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Assessment of Surface and Ground-water Resource Using SWAT model. A Case of Sigi River Catchments, Tanga Tanzania.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Sigi River is a very important fresh water resource in resident of Tanga region in Tanzania. Sigi River basin is one of the basins within Pangani main catchments contributing most of the recharge water into a man made reservoir named Mabayani Dam.

The SWAT model was applied to the Sigi Basin for modelling of the hydrological water components. The objective of this study is to evaluate the water balance of Mabayani reser-voir (dam) over the range of different years and to asses and evaluate the hydrological com-ponents of the catchments in relation to existing land use and stream flow prediction. The input data for this research were DEM, land use map, soil data, daily precipitation, daily min-imum and maximum temperature, dam management data, daily river discharge and dam wa-ter abstraction.

The sensitivity analysis of the model indicates that some hydrological controlling parameter can be identified without observed data. The sensitivity analysis indicates the flow is more sensitive to hydrologic response unit. The Parasol calibration of the monthly discharge gave moderately satisfactory Nash Sutcliffe Coefficient of Efficiency of 75%.

The hydrological modelling resulting to a mean total annual water yield of 850 mm of which the mean annual surface runoff was 500 mm and base flow was 310 mm. The simulation in-dicates the surface runoff is important hydrological component compared to base flow

The outcome of this study can assist the decision makers, water use planners, and stakehold-ers in the best ways to manage the existing surface and groundwater resources within the Sigi catchments.

Place, publisher, year, edition, pages
, TRITA-LWR Degree Project, ISSN 1651-064X ; 2014:16
National Category
Civil Engineering
URN: urn:nbn:se:kth:diva-171786OAI: diva2:844508
Educational program
Degree of Master - Water System Technology
Available from: 2015-08-11 Created: 2015-08-06 Last updated: 2015-08-11Bibliographically approved

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