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Predicting agricultural drought indicators: ML approaches across wide-ranging climate and land use conditions
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering. Stockholm Univ, Dept Phys Geog, SE-10691 Stockholm, Sweden..
Stockholm Univ, Dept Phys Geog, SE-10691 Stockholm, Sweden.;Polytech Inst Coimbra, Res Ctr Nat Resources Environm & Soc CERNAS, Coimbra Agrarian Tech Sch, P-3045 Coimbra, Portugal..
Stockholm Univ, Dept Phys Geog, SE-10691 Stockholm, Sweden..
Shanghai Jiao Tong Univ, Sch Publ & Int Affairs, 800 Dongchuan Ra, Shanghai 200240, Peoples R China..
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2023 (English)In: Ecological Indicators, ISSN 1470-160X, E-ISSN 1872-7034, Vol. 154, article id 110524Article in journal (Refereed) Published
Abstract [en]

Agricultural drought can severely reduce crop yields, lead to large economic losses and health impacts. Combined climate and land use variations determine key indicators of agricultural drought, including soil moisture and the Palmer drought severity index (PDSI). This study investigated the use of machine learning (ML) methods for predicting these indicators over Sweden, spanning steep climate and land use gradients. Three data arrangement methods (multi-features, temporal, and spatial) were used and compared in combination with seven ML/deep learning (DL) models (random forest (RF), decision tree, multivariate linear regression, support vector regression, autoregressive integrated moving average (AMIRA), artificial neural network, and convolutional neural network). Seven investigated features, obtained from Google Earth Engine, were used in the ML/DL modeling (soil moisture, PDSI, precipitation, evapotranspiration, elevation, slope and soil texture). The temporal ARIMA model (found most suitable for local scale prediction) and the multi-features RF model (more suitable for national-scale prediction) emerged as best performing for soil moisture prediction (with MAE of 9.1 and 11.95, and R2 of 0.79 and 0.59, respectively). All models generally performed better in predicting the soil moisture than the PDSI indicator of drought. For drought indicator prediction and mapping, previous-year average monthly soil moisture emerged as the most important feature, combined with the four additional corresponding features of PDSI, precipitation, evapotranspiration and elevation.

Place, publisher, year, edition, pages
Elsevier BV , 2023. Vol. 154, article id 110524
Keywords [en]
Drought, Soil moisture, Palmer drought severity index, Climate, Land use, Machine learning, Sweden
National Category
Agriculture, Forestry and Fisheries
Identifiers
URN: urn:nbn:se:kth:diva-333778DOI: 10.1016/j.ecolind.2023.110524ISI: 001034589400001Scopus ID: 2-s2.0-85163201022OAI: oai:DiVA.org:kth-333778DiVA, id: diva2:1786916
Note

QC 20230810

Available from: 2023-08-10 Created: 2023-08-10 Last updated: 2025-02-07Bibliographically approved

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Kan, Jung-ChingKalantari, Zahra

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