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  • 1.
    Chen, Xuanjing
    et al.
    College of Resources and Environment, Southwest University, Chongqing, PR China, Water Systems and Global Change Group, Wageningen University & Research, PB, Wageningen, the Netherlands..
    Strokal, Maryna
    Water Systems and Global Change Group, Wageningen University & Research, PB, Wageningen, the Netherlands..
    Kroeze, Carolien
    Water Systems and Global Change Group, Wageningen University & Research, PB, Wageningen, the Netherlands.
    Ma, Lin
    Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, PR China..
    Shen, Zhenyao
    State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, PR China..
    Wu, Jiechen
    Key Lab of Plant-Soil Interaction, MOE, Center for Resources, Environment and Food Security, College of Resources. Environmental Sciences, China Agricultural University, Beijing, PR China..
    Chen, Xinping
    College of Resources and Environment, Southwest University, Chongqing, PR China, Academy of Agricultural Sciences, Southwest University, Chongqing, PR China..
    Shi, Xiaojun
    College of Resources and Environment, Southwest University, Chongqing, PR China, Academy of Agricultural Sciences, Southwest University, Tiansheng Road 02, Chongqing 400715, PR China..
    Seasonality in river export of nitrogen: A modelling approach for the Yangtze River2019In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026Article in journal (Refereed)
  • 2.
    Gao, Xiang
    et al.
    College of Land Science and Technology, China Agricultural University, Beijing 100193, China.
    Han, Wenchao
    College of Land Science and Technology, China Agricultural University, Beijing 100193, China.
    Hu, Qiyuan
    College of Land Science and Technology, China Agricultural University, Beijing 100193, China.
    Qin, Yuting
    College of Land Science and Technology, China Agricultural University, Beijing 100193, China.
    Wang, Sijia
    College of Land Science and Technology, China Agricultural University, Beijing 100193, China.
    Lun, Fei
    College of Land Science and Technology, China Agricultural University, Beijing 100193, China.
    Sun, Jing
    Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering.
    Xiao, Xiao
    College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
    Lan, Yang
    The Bartlett School of Environment, Energy and Resources, University College London, London WC1E 6BT, UK.
    Li, Hong
    Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
    Planting Age Identification and Yield Prediction of Apple Orchard Using Time-Series Spectral Endmember and Logistic Growth Model2023In: Remote Sensing, E-ISSN 2072-4292, Vol. 15, no 3, p. 642-642Article in journal (Refereed)
    Abstract [en]

    In response to significant shifts in dietary and lifestyle preferences, the global demand for fruits has increased dramatically, especially for apples, which are consumed worldwide. Growing apple orchards of more productive and higher quality with limited land resources is the way forward. Precise planting age identification and yield prediction are indispensable for the apple market in terms of sustainable supply, price regulation, and planting management. The planting age of apple trees significantly determines productivity, quality, and yield. Therefore, we integrated the time-series spectral endmember and logistic growth model (LGM) to accurately identify the planting age of apple orchard, and we conducted planting age-driven yield prediction using a neural network model. Firstly, we fitted the time-series spectral endmember of green photosynthetic vegetation (GV) with the LGM. By using the four-points method, the environmental carrying capacity (ECC) in the LGM was available, which serves as a crucial parameter to determine the planting age. Secondly, we combined annual planting age with historical apple yield to train the back propagation (BP) neural network model and obtained the predicted apple yields for 12 counties. The results show that the LGM method can accurately estimate the orchard planting age, with Mean Absolute Error (MAE) being 1.76 and the Root Mean Square Error (RMSE) being 2.24. The strong correlation between orchard planting age and apple yield was proved. The results of planting age-driven yield prediction have high accuracy, with the MAE up to 2.95% and the RMSE up to 3.71%. This study provides a novel method to accurately estimate apple orchard planting age and yields, which can support policy formulation and orchard planning in the future.

  • 3. Gong, Haiqing
    et al.
    Guo, Yu
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering.
    Wu, Huijun
    Nkebiwe, Peteh Mehdi
    Pu, Zhengxian
    Feng, Gu
    Jiao, Xiaoqiang
    Synergies in sustainable phosphorus use and greenhouse gas emissions mitigation in China:: Perspectives from the entire supply chain from fertilizer production to agricultural use2022In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, p. 155997-155997, article id 155997Article in journal (Refereed)
    Abstract [en]

    Synergies to achieve high phosphorus (P) use efficiency (PUE) and mitigate greenhouse gas (GHG) emissions are critical for developing strategies aimed toward agricultural green development. However, the potential effects of such synergies in the entire P supply chain through optimizing P management in crop production are poorly understood. In this study, a partial life cycle of a GHG emissions model was developed to quantify the P-related GHG emissions in the entire P supply chain in China. Our results showed that 16.3 kg CO2-equivalent (CO2-eq) was produced from the entire P supply chain per unit of P used for grain agriculture (maize, rice, and wheat). P-related GHG emissions in China increased more than five-fold from 1980 (7.2 Tg CO2-eq) to 2018 (44.9 Tg CO2-eq). GHG emissions were found to be strongly associated with the intensity of grain production in China, and they varied considerably across production regions owing to the differences in the P fertilizer production efficiency. Mineral P fertilizer use in crop production was the primary source of P-related GHG emissions. The results suggest that sustainable P management by matching mineral P fertilizer rates and fertilizer types with crop needs can mitigate GHG emissions by 10.8–27.7 Tg (24.0–65.1%). Moreover, this can improve PUE and reduce mineral P input by 0.7–1.4 Tg (24.0–46.0%). These findings highlight that potential synergies between high PUE and low P-related GHG emissions can be achieved via sustainable P management, thereby enhancing green agricultural development in China and other regions worldwide.

  • 4.
    Gong, Haiqing
    et al.
    National Academy of Agriculture Green Development, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China.
    Meng, Fanlei
    National Academy of Agriculture Green Development, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China.
    Wamg, Guohao
    National Academy of Agriculture Green Development, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China.
    Hartmann, Tobias Edward
    Institute of Crop Science, University of Hohenheim, Stuttgart 70593, Germany.
    Feng, Gu
    National Academy of Agriculture Green Development, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China.
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
    Jiao, Xiaoqiang
    National Academy of Agriculture Green Development, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China.
    Zhang, Fusuo
    National Academy of Agriculture Green Development, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing 100193, China.
    Toward the sustainable use of mineral phosphorus fertilizers for crop production in China: From primary resource demand to final agricultural use2022In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 804, no 150183Article in journal (Refereed)
  • 5. Gong, Haiqing
    et al.
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering.
    Feng, Gu
    Jiao, Xiaoqiang
    Phosphorus supply chain for sustainable food production will have mitigated environmental pressure with region-specific phosphorus management2023In: Resources, Conservation and Recycling, ISSN 0921-3449, E-ISSN 1879-0658, Vol. 188, p. 106686-106686, article id 106686Article in journal (Refereed)
  • 6. Gong, Haiqing
    et al.
    Xiang, Yue
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
    Nkebiwe, Peteh Mehdi
    Feng, Gu
    Jiao, Xiaoqiang
    Zhang, Fusuo
    Using knowledge-based management for sustainable phosphorus use in China2022In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 814, p. 152739-152739, article id 152739Article in journal (Refereed)
    Abstract [en]

    Sustainable phosphorus (P) management presents challenges in crop production and environmental protection; the current understanding of chemical P-fertilizer manufacturing, rock phosphate (RP) mining, P loss within supply chains, and strategies to mitigate loss is incomplete because of a fragmented understanding of P in the crop production supply chain. Therefore, we develop a knowledge-based management theoretical framework to analyze P supply chains to explore ways to mitigate China's P crisis. This framework connects upstream P industries and crop production, addressing knowledge gaps and stakeholder involvement. We demonstrate the potential to improve P use efficiency in the supply chain, thereby mitigating the P crisis using optimized P management. Our results showed that P footprint and grain production demand for RP can be reduced without yield penalty using a crop-demand-oriented P supply chain management that integrates P use in crop production, P-fertilizer manufacturing, and RP mining. Food security and P-related environment sustainability can be achieved by sharing responsibility and knowledge among stakeholders. 

    Download full text (pdf)
    Gong et al., 2022
  • 7.
    Hou, Yong
    et al.
    College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China..
    Wei, Sha
    College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China..
    Ma, Wenqi
    College of Resources and Environmental Science, Hebei Agricultural University, Baoding 071001, PR China..
    Roelcke, Marco
    Institute of Geoecology, Technische Universität Braunschweig, Braunschweig 38106, Germany..
    Nieder, Rolf
    Institute of Geoecology, Technische Universität Braunschweig, Braunschweig 38106, Germany..
    Shi, Shengli
    College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China..
    Wu, Jiechen
    College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China..
    Zhang, Fusuo
    College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, PR China..
    Changes in nitrogen and phosphorus flows and losses in agricultural systems of three megacities of China, 1990–20142018In: Resources, Conservation and Recycling, ISSN 0921-3449Article in journal (Refereed)
  • 8. Ishfaq, Muhammad
    et al.
    Wang, Yongqi
    Xu, Jiuliang
    Hassan, Mahmood Ul
    Yuan, Hao
    Liu, Lianlian
    He, Boyi
    Ejaz, Irsa
    White, Philip J.
    Cakmak, Ismail
    Chen, Wei-Shan
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering.
    van der Werf, Wopke
    Li, Chunjian
    Zhang, Fusuo
    Li, Xuexian
    Improvement of nutritional quality of food crops with fertilizer: a global meta-analysis2023In: Agronomy for Sustainable Development, ISSN 1774-0746, E-ISSN 1773-0155, Vol. 43, no 6, article id 74Article in journal (Refereed)
    Abstract [en]

    Providing the world’s population with sufficient and nutritious food through sustainable food systems is a major challenge of the twenty-first century. Fertilizer use is a major driver of crop yield, but a comprehensive synthesis of the effect of fertilizer on the nutritional quality of food crops is lacking. Here we performed a comprehensive global meta-analysis using 7859 data pairs from 551 field experiment-based articles published between 1972 and 2022, assessing the contribution of fertilization with a wide set of plant nutrients to the nutritional quality of food crops (i.e., fruits, vegetables, cereals, pulses/oil crops, and sugar crops). On average, fertilizer application improved crop yield by 30.9% (CI: 28.2–33.7%) and nutritional quality (referring to all nutritionally relevant components assessed; carbohydrates, proteins, oil, vitamin C, representative mineral nutrients, and total soluble solids) by 11.9% (CI: 10.7–12.1%). The improvements were largely nutrient- and crop species dependent, with vegetables being the most responsive. Potassium, magnesium, and micronutrients played important roles in promoting crop nutritional quality, whereas the combined application of inorganic and organic source(s) had the greatest impact on quality. Desirable climatic conditions and soil properties (i.e., silt loam, soil organic matter 2.5–5.0%, and pH 4.5–8.5) supported further enhancements. Considering cross-continent responsiveness, the increase in the nutritional quality of food crops with fertilizer application was greatest in Africa. In a nutshell, our findings pave the way towards a quantitative understanding of nutrient management programs and responsible plant nutrition solutions that foster the sustainable production of nutritious and healthy food crops for human consumption.

  • 9.
    Li, Shuo
    et al.
    School of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei, 071002, China. College of Natural Resources and Environment, Northwest Agriculture and Forestry University, Yangling, Shaanxi, 712100, China.
    Hu, Mengjun
    International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng, Henan 475004, China.
    Shi, Jianglan
    College of Natural Resources and Environment, Northwest Agriculture and Forestry University, Yangling, Shaanxi, 712100, China.
    Tian, Xiaohong
    College of Natural Resources and Environment, Northwest Agriculture and Forestry University, Yangling, Shaanxi, 712100, China.
    Wu, Jiechen
    College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, 100193 Beijing, China.Luleå tekniska universitet, Arkitektur och vatten.
    Integrated wheat-maize straw and tillage management strategies influence economic profit and carbon footprint in the Guanzhong Plain of China2021In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 767, article id 145347Article in journal (Refereed)
    Abstract [en]

    Appropriate straw and tillage management strategies increase grain yields, and promote atmospheric carbon dioxide (CO2) mitigation through soil organic carbon (SOC) sequestration. However, little is known about economic parameters and carbon footprint (CF, defined as total greenhouse gases emission from the whole life cycle perspective) of intensive wheat (Triticum aestivum L.)-maize (Zea mays L.) double cropping production under different integrated strategies of straw-return and tillage. To quantify the differences of straw-return and tillage integrated strategies in economic parameters and carbon sustainability, a field experiment was established in 2008 in which six integrated strategies were evaluated: straw return of both maize and wheat (MR-WR), MR-WR with subsoiling to ~40 cm depth after maize harvest (MS-WR), single straw return of wheat (MN-WR), single straw return of maize (MR-WN), MR-WN with subsoiling to ~40 cm depth after maize harvest (MS-WN) and no straw return (MN-WN). Results showed that the MS-WR had the greatest grain yields of both wheat and maize, gross revenue and economic profit with increases of 45.5%, 35.6%, 26.5%, and 79.7% relative to the MN-WN, respectively. Compared with the initial SOC level, the SOC stock increased by 22.9% under MS-WR, following by MR-WR (16.0%), MS-WN (11.6%), MR-WN (8.0%), MN-WR (5.1%), and MN-WN (-3.8%). The MS-WR reduced the net CF and net CF per economic profit by 35.4% and 64.1% relative to the MN-WN although it elevated the CF by 25.3%. Therefore, adopting the integrated strategies of both maize and wheat straw return with subsoiling to ~40 cm depth after maize harvest represented an economically and C-friendly optimal field management practice for intensive wheat-maize double cropping production in the Guanzhong Plain or other regions with similar environmental conditions in the world.

  • 10. Li, Shuo
    et al.
    Wang, Shujuan
    Shi, Jianglan
    Tian, Xiaohong
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering.
    Economic, energy and environmental performance assessment on wheat production under water-saving cultivation strategies2022In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, p. 125330-125330, article id 125330Article in journal (Refereed)
    Abstract [en]

    Improvements in economic profit, energy-use efficiency and environmental friendliness are critical for the sustainability of wheat production. The present study was aimed at evaluating the suitability of wheat production shifting conventional flat planting (CFH) and supplemental irrigation (SIH) with water-saving cultivation strategies [straw mulching (SML) and plastic film mulching (PFL) with 50% less N fertilizer] from economic, energy, and environmental perspectives on the Loess Plateau of China. Results showed that the PFL exhibited ∼18.5% and 12.7% higher grain yields, and 74.0% and 59.9% higher economic profit over the CFH and SML, while reduced grain yields by 9.6% retative to the SIH. Meanwhile, the economic profit and the ratio of income to cost remained consistent between the PFL and SIH. The PFL had the highest net energy out, energy use efficiency and energy productivity, but had the lowest specific energy. Compared with the SIH, the total environmental emissions final score increased by 36.6% under SML, while decreased by 24.8% under PFL. Overall, the strategy of plastic film mulching with 50% less N fertilizer has great potential to cater to the demands of wheat production with environmental sustainability on the Loess Plateau of China.

  • 11. Li, Shuo
    et al.
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
    Ma, Lin
    Economic, energy and environmental consequences of shifting from maize-wheat to forage rotation in the North China Plain2021In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 328Article in journal (Refereed)
    Abstract [en]

    Intensive self-sufficient forage production is one of the dominant challenges for the boosting intensification of livestock production. However, there is limited information on the economic, energy and environmental consequences of converting conventional crop systems with intensive forage production systems. Based on 4-year field experiments, this work proposed a comprehensive assessment of the shift from maize-wheat (M-W) to forage production systems [silage maize-ryegrass (SM-R), sweet sorghum-ryegrass (SS-R), and sorghum-sudangrass hybrids-ryegrass (SH-R)] from economic, energy, and environmental perspectives in the northern part of the North China Plain (NCP). The results revealed that SH-R had the highest yields of dry shoot biomass and crude protein, followed by SS-R, SM-R, and M-W. Similar trends were also found for the net return, ratio of income to costs, net energy output, energy use efficiency, and energy productivity. Furthermore, the environmental assessment through a life cycle assessment suggested that compared with the M-W, the total potential environmental impacts for the product-based indicators were reduced by 50%, 55%, and 72% in SM-R, SS-R, and SH-R, respectively, even if crop protection was based on a prophylactic approach. Thus, shifting from maize-wheat to forage rotation systems, especially the sorghum-sudangrass hybrids-ryegrass system, may be promising for forage production in the northern part of the NCP. This work provides valuable insight into forage production system design and environmental change adaptation for improving food security and achieving green/circular economy.

  • 12.
    Li, Shuo
    et al.
    Key Laboratory of Agricultural Water Resources, Hebei Key Laboratory of Soil Ecology, Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology, Chinese Academy of Science, 286 Huaizhong Road, Shijiazhuang, 050021, Hebei, China. College of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, Hebei, China.
    Wu, Jiechen
    Luleå tekniska universitet, Arkitektur och vatten.
    Wang, Xiaoqin
    College of Natural Resources and Environment, Northwest Agriculture and Forestry University, Yangling, 712100, China.
    Ma, Lin
    Key Laboratory of Agricultural Water Resources, Hebei Key Laboratory of Soil Ecology, Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology, Chinese Academy of Science, 286 Huaizhong Road, Shijiazhuang, 050021, Hebei, China.
    Economic and environmental sustainability of maize-wheat rotation production when substituting mineral fertilizers with manure in the North China Plain2020In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 271, article id 122683Article in journal (Refereed)
    Abstract [en]

    Substituting mineral fertilizers with manure has been promoted to enrich soil fertility and maintain field productivity in agricultural production systems. However, there is limited information regarding the effect of substituting mineral-N with manure on eco-efficiency (economic and environmental trade-offs) from a Life Cycle Assessment (LCA) perspective. This study investigated the eco-efficiency of maize-wheat rotation production under three fertilization strategies: mineral fertilizer NPK (CK), substituting 50% of mineral-N with solid manure (SM + NK), and substituting 50% of mineral-N with liquid manure (LM + NP) in the North China Plain. The economic profits were evaluated based on the prevailing market prices of inputs, outputs, and services. The potential environmental impacts were assessed by the LCA approach. The eco-efficiency was evaluated as the ratio of economic profit to individual environmental impact categories. The results from the economic analysis and the LCA showed that, compared with CK, the economic profit increased by 17.2% and 19.1%, while the environmental impacts at the endpoint level decreased by 24.6% and 37.9% under SM + NK and LM + NP, respectively. Additionally, the eco-efficiencies under SM + NK and LM + NP at the endpoint level were calculated to be 55.4% and 91.7%, respectively, higher than CK. Overall, the results suggested that substituting 50% of mineral-N with manure, especially liquid manure, had a great potential for sustainable maize-wheat rotation production in the North China Plain.

  • 13.
    Li, Suyang
    et al.
    College of Metrology and Measurement Engineering, China Jiliang University, 310018 Hangzhou China.
    Chen, Junjie
    College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou China.
    Xu, Wanbing
    College of Metrology and Measurement Engineering, China Jiliang University, 310018 Hangzhou China.
    Sun, Biao
    School of Electrical and Information Engineering, Tianjin University, 300072 Tianjin China.
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
    Chen, Qiang
    College of Optical and Electronic Technology, China Jiliang University, 310018 Hangzhou China.
    Liang, Pei
    College of Metrology and Measurement Engineering, China Jiliang University, 310018 Hangzhou China.
    Highly homogeneous bimetallic core-shell Au@Ag nanoparticles with embedded internal standard fabrication using a microreactor for reliable quantitative SERS detection2023In: Materials Chemistry Frontiers, E-ISSN 2052-1537, Vol. 7, no 6, p. 1100-1109Article in journal (Refereed)
    Abstract [en]

    Bimetallic gold core-silver shell (Au@Ag) surface-enhanced Raman scattering tags draw broad interest in the fields of biological and environmental analyses. Herein, an efficient hybrid microfluidic chip was designed to prepare uniform Au@Ag core-shell nanoparticles, and DTNB was used as the internal standard tag molecule to prepare Au@DTNB@Ag for SERS detection. Homogeneous core-shell nanoparticles with a particle size of 90 nm were prepared by mixing a silver precursor and a gold core in a microfluidic chip. The relative standard deviation (RSD) of the particle size distribution was close to 10%, and the detection limit of 4-MBA was as low as 10-10 M. In order to solve the influence of SERS signal fluctuation, a uniform Au@DTNB@Ag core-molecule-shell structure was synthesized in a microfluidic chip, and the characteristic peak of the analyte was corrected by the relative intensity of the DTNB characteristic peak (1335 cm−1). The experimental results showed that the SERS detection was achieved with high reproducibility, and the SERS peak intensity had a good linear correlation with the concentration. The homogeneous SERS substrate prepared using a microfluidic chip has potential for sensitive and reliable detection of environmental chemical contaminants.

  • 14.
    Li, Suyang
    et al.
    China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Peoples R China..
    Liang, Pei
    China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Peoples R China..
    Chen, Qiang
    China Jiliang Univ, Coll Metrol & Measurement Engn, Hangzhou 310018, Peoples R China..
    Sun, Biao
    Tianjin Univ, Sch Elect & Informat Engn, Tianjin 300000, Peoples R China..
    Shang, Ziyang
    China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Peoples R China..
    Huang, Jie
    China Jiliang Univ, Coll Opt & Elect Technol, Hangzhou 310018, Peoples R China..
    Zou, Mingqiang
    Chinese Acad Inspect & Quarantine CAIQ, A 3 Gaobeidian Rd, Beijing 100123, Peoples R China..
    Qi, Xiaohua
    Chinese Acad Inspect & Quarantine CAIQ, A 3 Gaobeidian Rd, Beijing 100123, Peoples R China..
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering.
    One-pot fabrication of Mo1-xWxS2 alloy nanosheets as SERS substrates with highly Raman enhancement effect and long-term stability2022In: Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, ISSN 1386-1425, E-ISSN 1873-3557, Vol. 279, p. 121465-, article id 121465Article in journal (Refereed)
    Abstract [en]

    A new Mo1-xWxS2 two-dimensional nanosheets were prepared by the one-pot method. After certain Mo atoms in MoS2 were replaced by W ones in a hydrothermal reduction procedure, Mo1-xWxS2 was formed on the Mo foil. Well enhanced Mo1-xWxS2 nanosheets were prepared when the sodium tungstate concentration got under control. Various characterizations were carried out, which indicate that Mo1-xWxS2 nanosheets with good crystallinity. Compared with MoS2, the Raman intensity of Rhodamine 6G (10-6 M) was amplified by 1.7 times with Mo1-xWxS2 nanosheets as the substrate. The characteristic Raman peaks could still be clearly distinguished until the concentration of Rhodamine 6G (R6G), Methylene blue (MB) and Crystal violet (CV) down to 10-8, 10-8 and 10- 7 M, respectively. With abundant edge active sites that facilitate charge transfer, Mo1-xWxS2 nanosheets could better enhance SERS signals of target detection molecules and get a good linear relationship exists within the concentration and Raman peak strength. In addition, R6G SERS detection also shows excellent reproducibility and long-term stability of this TMDs SERS substrate.

  • 15. Li, Ziyue
    et al.
    Chen, Yongliang
    Meng, Fanlei
    Shao, Qi
    Heal, Mathew R.
    Ren, Fengling
    Tang, Aohan
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering.
    Liu, Xuejun
    Cui, Zhenling
    Xu, Wen
    Integrating life cycle assessment and a farmer survey of management practices to study environmental impacts of peach production in Beijing, China2022In: Environmental Science and Pollution Research, ISSN 0944-1344, E-ISSN 1614-7499Article in journal (Refereed)
    Abstract [en]

    While intensive peach production has expanded rapidly in recent years, few studies have explored the environmental impacts associated with specific regional systems or the optimal management strategies to minimize associated environmental risks. Here, data from a survey of 290 native farmers were used to conduct a life cycle assessment to quantify the acidification potential (AP), global warming potential (GWP), eutrophication potential (EP), and reactive nitrogen (Nr) losses in peach production in Pinggu District, Beijing. Total annual Nr losses, and GWP, AP, and EP values for peach production in Pinggu District were respectively 10.7 kg N t−1, 857 kg CO2-eq t−1, 12.9 kg SO2-eq t−1, and 4.1 kg PO4-eq t−1. The principal driving factors were fertilizer production, transportation, and application, which together accounted for 94%, 67%, 75%, and 94% of Nr losses, GWP, AP, and EP, respectively. In the high yield, high nitrogen-use efficiency (HH) group, relative values of Nr losses, GWP, AP, and EP were respectively 33%, 25%, 39%, and 32% lower than the overall averages for 290 orchards. Further analyses indicate that improved farming practices such as decreasing application rates of fertilizers, increasing proportion of base fertilization rate, and proper fertilization frequency in the HH group were the main reasons for these orchards’ better performance in peach yields and partial factor productivity of nitrogen fertilizer, and their reduced environmental impacts. These results highlight the need to optimize nutrient management in peach production in order simultaneously to realize both environmental sustainability and high productivity in the peach production system.

  • 16. Masso, Cargele
    Adhya, Tapan
    S A Blackwell, Martin
    A Macintosh, Katrina
    J. Johnes, Penny
    M Haygarth, Phil
    Withers, Paul
    Feng, Gu
    Li, Haigang
    Zhang, Chaochun
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering.
    Shen, Jianbo
    I. Stutter, Marc
    Cheng, Lingyun
    Brownlie, Will
    Our Phosphorus Future: Chapter 4. Opportunities for better phosphorus use in agriculture2022Report (Refereed)
  • 17.
    Wang, Zihan
    et al.
    College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, PR China.
    Fang, Ke
    College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, PR China.
    Lun, Fei
    College of Land Science and Technology, China Agricultural University, Beijing, 100193, PR China.
    Hartmann, Tobias Edward
    Landwirtschaftskammer für Das Saarland, Bexbach, 66450, Germany.
    Hou, Yong
    College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, PR China.
    Zhang, Fusuo
    College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, 100193, PR China.
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
    Phosphorus flow analysis for megacities using a coupled city-hinterland approach: Case study of Beijing2021In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 320, article id 128866Article in journal (Refereed)
    Abstract [en]

    Rapid urbanization has decoupled phosphorus (P) urban consumption and hinterland production, which has accelerated the need for a broader perspective that includes the city and hinterland in managing the P cycle. However, there is a scarcity of frameworks for the combined city and hinterland approach, aimed at quantifying the transboundary P flow between the city and hinterland. In this study, we developed a coupled city-hinterland framework (using Beijing as a case study) to assess the P flow pattern at the source, waste, and transboundary flow using substance flow analysis, and proposed a pathway to identify the key subsystem in the coupled system by sensitivity analysis. Results shows that the P waste within Beijing is due to human consumption, rather than production, while P waste in the hinterland was nearly twice that observed in Beijing. Further, hinterland crop production subsystems were identified as the key subsystem to reduce P rock demand for the whole coupled system; 39% of P rock demand could be reduced by optimizing fertilizer use in the hinterland. In the scenarios that consider an improvement in technology both in Beijing and its hinterland, 64% and 60% of the total P rock demand and waste were reduced, respectively. Therefore, we provided suggestions to reduce P waste in the coupled system. This study provides a broader perspective to evaluate the impacts of urban consumption on the hinterland, which will serve as a basis for policy decisions for sustainable P flow in the supply chain of other similar cities.

  • 18.
    Wang, Zihan
    et al.
    College of Resources and Environmental Sciences, China Agricultural University, PR China..
    Hartmann, Tobias Edward
    Institute of Crop Science, University of Hohenheim, Germany..
    Wang, Xiuheng
    State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, PR China..
    Cui, Zhenling
    College of Resources and Environmental Sciences, China Agricultural University, PR China..
    Hou, Yong
    College of Resources and Environmental Sciences, China Agricultural University, PR China..
    Meng, Fanlei
    College of Resources and Environmental Sciences, China Agricultural University, PR China..
    Yu, Xingchen
    College of Resources and Environmental Sciences, China Agricultural University, PR China..
    Wu, Jiechen
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water. College of Resources and Environmental Sciences, China Agricultural University, PR China..
    Zhang, Fusuo
    College of Resources and Environmental Sciences, China Agricultural University, PR China..
    Phosphorus flow analysis in the maize based food-feed-energy systems in China2020In: Environmental Research, ISSN 0013-9351, E-ISSN 1096-0953, Vol. 184, article id 109319Article in journal (Refereed)
    Abstract [en]

    Phosphorus (P) is an essential and limiting nutrient for agricultural systems, where the demand for agricultural products such as food, feed, and bio-fuel are the major drivers of the intensification of agricultural production systems. Globally, maize is one of three main cereal crops, a main feedstock for animal production and a substrate for the production of bio-ethanol. This study investigated P flows through the multiple utilization systems of maize (as represented by the subsystems of food, feed and energy production) at a crop level of 2016 as reference year and made future predictions of P flows for the year 2030 based on different scenarios for foodfeed-energy systems in China. For 2016, the subsystem of animal production resulted in the highest waste of P due to inappropriate manure management, but the subsystem of value-added products (Bio-fuel production, distillers dried grains with solubles (DDGS), maize-oil) showed the lowest P use efficiency (39%). From the value-added subsystem, 17% of P from the process flow to the subsystem of animal production as DDGS, and 61% of P is wasted associated with wastewater and sludge. Future scenarios of structural adjustments in the maize consumption system predict that the supply of maize for animal feed will be threatened if the policy of the Biofuel National Promotion before 2020 is fully implemented in China, as current maize production will not meet the future demand of food, feed and energy simultaneously. The results emphasized the use of P waste resources and better sludge management from a systems perspective. This also implied the importance of exploring coordinated development and integrated strategies for sustainable P flow management in multiple utilization systems.

  • 19. Wang, Zihan
    et al.
    Yin, Yulong
    Liu, Gang
    Lun, Fei
    Zhang, Fusuo
    Cui, Zhenling
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Water and Environmental Engineering. College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
    International trade reduces global phosphorus demand but intensifies the imbalance in local consumption2022In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 830, p. 154484-, article id 154484Article in journal (Refereed)
    Abstract [en]

    International trade has led to increasing levels of economic development; however, its role in altering the global phosphorus (P) demand and local P footprint (PF) is unclear. Here, through a multi-regional input–output (MRIO) analysis, we quantified the PF associated with the global consumption of agricultural products for 159 countries and 169 crops over the period of 1995–2015. The results suggested that the international network of P flows was highly connected and the flow distribution was overridingly driven by developed economies (e.g., USA and Germany) and large emerging economies (e.g., China and India). A decoupling between the PF and economic growth was observed in most countries. The high PF per capita in developed economies was mainly driven by imports from developing countries rather than domestic P applications. Our results also highlighted that international trade had two impacts on global P management. Firstly, it reduced the total global P demand from agricultural production by 16%; secondly, it intensified the imbalance of local P consumption. Therefore, the future sustainable management of P requires consideration of the original suppliers and final consumers along the global supply chains and the associated consequences on P management from both local and global perspectives.

  • 20.
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Systems Perspectives on Modelling and Managing Future Anthropogenic Emissions in Urban Areas: Nitrogen, Phosphorus and Carbon Studies in Stockholm, Sweden2016Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Managing anthropogenic emissions in urban areas is a major challenge in sustainable environmental development for cities, and future changes and increasing urbanisation may increase this challenge. Systems perspectives have become increasingly important in helping urban managers understand how different changes may alter future emissions and whether current management strategies can efficiently manage these emissions. This thesis provides some systems perspectives that have been lacking in previous studies on modelling and managing future anthropogenic emissions in urban areas. The city of Stockholm, Sweden, was selected as the study site and studies about nitrogen, phosphorus and carbon were chosen, given world-wide urban eutrophication and global concerns about climate change. A substance flow analysis (SFA) structured model, comprising a source model coupled with a watershed model in an SFA structure, was developed to investigate future nutrient loading scenarios under various urban changes in small urban lake catchments. The results demonstrated that climate change potentially posed a greater threat to future nutrient loads to a selected lake catchment in Stockholm than the other scenarios examined. Another SFA-based study on future phosphorus flows through the city of Stockholm indicated that the best management option may depend on the perspective applied when comparing future scenarios of phosphorus flows and that both upstream and downstream measures need to be considered in managing urban phosphorus flows. An evaluation approach for examining current management plans and low-carbon city initiatives using the Driving forces-Pressure-States-Impact-Response (DPSIR) framework, was formulated. With such an evaluation approach, investigation of how well selected plans cover different aspects of the DPSIR framework and whether root causes and systematic measures are highlighted is possible. The results revealed that the current low-carbon city initiative in Stockholm falls within pressure-based, driver-orientated plans and that technical, institutional and cognitional measures are generally well covered. 

    Download full text (pdf)
    Jiechen Wu_Doctoral thesis 2016
  • 21.
    Wu, Jiechen
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Brandt, Nils
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Malmström, Maria E.
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Climate change effects on nitrogen loading to urban lakes: The case of Råcksta Träsk, Stockholm, Sweden2013In: Proceedings of the 6th International Perspectives on Water Resources & the Environment, 2013Conference paper (Refereed)
    Abstract [en]

    Nutrient loads to aquatic recipients can be expected to change due to climate change. In this work, we focus on nitrogen loads to the lake Råcksta Träsk in Stockholm, Sweden as an example of an urban ecosystem. A substance flow model is developed to describe the sources and pathways of nitrogen at present. A feed-back table approach is applied to indicate potential climate change effects on nitrogen source strengths and processes in pathways, using existing regional climate change scenarios. The tentative results indicate that biological, hydrological, meteorological and biogeochemical effects and change in human behavior as response to climate change may lead to altered nitrogen flows through an urban catchment.

    Download full text (pdf)
    fulltext
  • 22.
    Wu, Jiechen
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Franzén, Daniel
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Malmström, Maria E.
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Anthropogenic phosphorus flows under different scenarios for the city of Stockholm, Sweden2016In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 542, p. 1094-1105Article in journal (Refereed)
    Abstract [en]

    Today, concerns prevail about the unsustainable use of phosphorus and worldwide eutrophication, thus requiring efficient management of phosphorus flows. With increasing population and associated urban growth, urban management of phosphorus flows in the perspectives of recycling, eutrophication and total budget becomes increasingly important. This study mapped phosphorus flows for a reference year (2013) and a future year (2030) using different scenarios for the city of Stockholm, Sweden. The results indicated that the Swedish goal of recycling phosphorus from wastewater would cover the majority of the total phosphorus budget for Stockholm. However, in 2013, only 10% of phosphorus was recycled for agricultural use, around half of which was from sewage sludge and the other half from food waste. Almost 50% of total phosphorus was sent to landfill/mining waste capping with sewage sludge, for economic reasons and lack of market. Among the scenarios of upstream and downstream urban management options studied in combination with population growth, recovery of phosphorus from sewage sludge had the greatest potential to increase the fraction recycled to agriculture. However, only upstream measures, e.g. changed diet, were able to reduce the total phosphorus budget. Urban management of phosphorus flows based on the different perspectives of recycling, eutrophication or total budget was shown to potentially result in different preferred management actions and both upstream and downstream measures need to be considered. Moreover, management needs to pay attention to small but environmentally sensitive flows, particularly when setting city goals on phosphorus recycling by percentage in a large budget.

    Download full text (pdf)
    fulltext
  • 23.
    Wu, Jiechen
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Franzén, Daniel
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Malmström, Maria E.
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Nutrient flows following changes in source strengths, land use and climate in an urban catchment, Råcksta Träsk in Stockholm, Sweden2016In: Ecological Modelling, ISSN 0304-3800, E-ISSN 1872-7026, Vol. 338, p. 69-77Article in journal (Refereed)
    Abstract [en]

    Managing nutrient flows to urban lakes is one of the main challenges to environmental sustainability in cities. Considering that future urban and climate changes may increase the challenge of handling future eutrophication, prediction of future nutrient loadings to aquatic environments in urban catchments has become increasingly important. Based on a new, innovative, structured Substance Flow Analysis (SFA) approach, where a source model was coupled to a Generalised Watershed Loading Functions (GWLF) model, this study investigated nutrient (nitrogen and phosphorus) delivery from sources to a water recipient for an urban catchment, using the case of Racksta Trask in Stockholm, Sweden, as an example. Potential effects from future changes in atmospheric deposition, vehicle volume and land use and from climate change (temperature and precipitation) were examined by comparing model scenarios in two periods (2000-2009 and 2050-2059). Model results suggested that climate change may have a greater impact on nitrogen loading to Racksta Trask lake than increasing vehicle volume and land use change. In addition, the results suggested that nitrogen loading to the lake may increase taking into account all changes examined, despite the expected decrease in background atmospheric deposition of nitrogen. In contrast, a marginal impact was found for phosphorus loading to the lake under all scenarios examined, resulting in only a slight increase in the combined scenario. From a nutrient pathways perspective, the results suggested that major pathways of nutrient loadings to the lake may not be much affected under most future scenarios examined, although groundwater was found to be a potentially sensitive pathway of nitrogen transport in the climate scenario. The model results provided important information for managers who need to plan for future nutrient handling in urban catchments, and the coupled SFA-GWLF model was suggested to be worthy of further testing at other sites and conditions.

  • 24.
    Wu, Jiechen
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water. College of Resources and Environmental Sciences, China Agricultural University, Beijing, PR China..
    Hartmann, Tobias Edward
    Fertilisation and Soil Matter Dynamics (340i), Institute of Crop Science, University of Hohenheim, Stuttgart, Germany..
    Chen, Weishan
    Environmental Technology Group, Wageningen University & Research, The Netherlands..
    Toward sustainable management of phosphorus flows in a changing rural–urban environment: recent advances, challenges, and opportunities2019In: Current Opinion in Environmental Sustainability, ISSN 18773435Article in journal (Refereed)
    Abstract [en]

    While food is mainly produced in rural areas, the main drivers of consumption are urban environments. The increasing demand for food in cities leads to an accumulation of phosphorus (P) in urban environments, which affects P flows at multiple scales. This study reviewed recent advances, challenges, and opportunities for sustainable management of P flows in decoupled rural–urban environments. We discussed recent advances in Substance Flow Analysis (SFA) that enable the characterization of P flows in rural–urban environments and illustrate how urban consumption affects rural food production systems. Most challenges of SFA are associated with the (1) spatial decoupling of food production in rural areas and food consumption in urban systems at multiple scales, (2) temporal implications of substance flows on system analysis, and (3) increasing complexity of resource flows in rural–urban environments. We identified three main opportunities for future research on sustainable management of P flows. These opportunities lie in linking urban and rural SFA through multi-scale analysis, increasing both spatial and temporal resolution of P flows within various environments and identifying how linking urban to rural environments can reduce pressure on primary production systems. Also, we highlighted that methodological development on high-resolution SFA at multiple scales is needed to close P cycles between rural and urban systems and to allow the development of future, sustainable P management systems in the anthropogenic food production chain.

  • 25.
    Wu, Jiechen
    et al.
    Luleå tekniska universitet, Arkitektur och vatten.
    Larm, Thomas
    StormTac Corporation, Stockholm, Sweden.
    Wahlsten, Anna
    StormTac Corporation, Stockholm, Sweden.
    Marsalek, Jiri
    Luleå tekniska universitet, Arkitektur och vatten.
    Viklander, Maria
    Luleå tekniska universitet, Arkitektur och vatten.
    Uncertainty inherent to a conceptual model StormTac Web simulating urban runoff quantity, quality and control2021In: Urban Water Journal, ISSN 1573-062X, Vol. 18, no 5, p. 300-309Article in journal (Refereed)
    Abstract [en]

    Assessing uncertainties of urban drainage models is important for their applications. While most attention in the literature was paid to large comprehensive models, little has been published about Low-Complexity Conceptual Models (LCCMs). This paper explores the uncertainties inherent to a conceptual, data-based proprietary model StormTac Web, simulating annual urban runoff quantity and quality, and serving here as an example of a LCCM. The analyses were demonstrated for a small urban catchment, Sätra in Stockholm, Sweden, using the Law of Propagation of Uncertainties and Morris screening methods. The results indicate that the uncertainty of the modelled annual runoff quality (about 30%) is greater than that of annual runoff volumes (about 24%), and the latter uncertainties can significantly contribute to the uncertainty in runoff quality. In computations of pollutant loads, the most sensitive inputs were land-use specific parameters, including the annual volumetric runoff coefficients and default pollutant concentrations for various land uses.

  • 26.
    Wu, Jiechen
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Malmström, Maria E.
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Nutrient loadings from urban catchments under climate change scenarios: Case studies in Stockholm, Sweden2015In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 518-519, p. 393-406Article in journal (Refereed)
    Abstract [en]

    Anthropogenic nutrient emissions and associated eutrophication of urban lakes are a global problem. Future changes in temperature and precipitation may influence nutrient loadings in lake catchments. A coupling method, where the Generalized Watershed Loading Functions method was tested in combination with source quantification in a Substance Flow Analysis structure, was suggested to investigate diffuse nutrient sources and pathways and climate change effects on the loadings to streamflow in urban catchments. This method may, with an acceptable level of uncertainty, be applied to urban catchments for first-hand estimations of nutrient loadings in the projected future and to highlight the need for further study and monitoring. Five lake catchments in Stockholm, Sweden (Råcksta Träsk, Judarn, Trekanten, Långsjön and Laduviken) were employed as case studies and potential climate change effects were explored by comparing loading scenarios in two periods (2000-2009 and 2021-2030). For the selected cases, the dominant diffuse sources of nutrients to urban streamflow were found to be background atmospheric concentration and vehicular traffic. The major pathways of the nitrogen loading were suggested to be from both developed areas and natural areas in the control period, while phosphorus was indicated to be largely transported through surface runoff from natural areas. Furthermore, for nitrogen, a modest redistribution of loadings from surface runoff and stormwater between seasons and an increase in the annual loading were suggested for the projected future climate scenarios as compared to the control period. The model was, due to poor monitoring data availability, only able to set an upper limit to nutrient transport by groundwater both in the control period and the future scenarios. However, for nitrogen, groundwater appeared to be the pathway most sensitive to climate change, with a considerable increase and seasonal redistribution of loadings. For phosphorus, loadings by different pathways were apparently less sensitive to climate change.

  • 27.
    Zhou, Guanghong
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Singh, Jagdeep
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Wu, Jiechen
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Sinha, Rajib
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Laurenti, Rafael
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Frostell, Björn
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
    Evaluating low-carbon city initiatives from the DPSIR framework perspective2015In: Habitat International, ISSN 0197-3975, E-ISSN 1873-5428, Vol. 50, p. 289-299Article in journal (Refereed)
    Abstract [en]

    Current low-carbon city initiatives were evaluated using the DPSIR (Drivingforces-Pressures-State-Impacts-Responses) causal-effect framework for investigating interactions between environmental issues and human activities. For effective management towards achieving a low-carbon city, integrating the pressure-based, driver-oriented DPSIR approach could help decision makers examine whether greenhouse gas (GHG) reduction approaches deal with the root causes of GHG emissions and work to-wards low-carbon city development goals. The DPSIR framework was used on 36 global cities to analyse the socio-economic dynamics of GHG emissions and their pressures on the environment, the state of the environment, related climate change impacts and responses from society. The results indicated that numerous cities have awareness of low-car bon plans and that most of these plans are pressure-based and driver-oriented. Most city plans recognise energy, transportation and building as the main driving forces for GHG emissions, which cause environmental pressures, and highlight technical responses to reduce GHG emissions pressures from these root causes. Inaddition, most plans recognise institutional and cognitional responses to low-carbon city development, such as: policies and legislation; departmental planning and cooperation; measuring, monitoring and reporting performance; capital invest-ment; community education and outreach; and stakeholder involvement.

1 - 27 of 27
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