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Simulating streamflow in the Upper Halda Basin of southeastern Bangladesh using SWAT model

Raihan, F., Beaumont, L. J., Maina, J., Saiful Islam, A. and Harrison, S. P. (2020) Simulating streamflow in the Upper Halda Basin of southeastern Bangladesh using SWAT model. Hydrological Sciences Journal, 65 (1). pp. 138-151. ISSN 2150-3435

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To link to this item DOI: 10.1080/02626667.2019.1682149

Abstract/Summary

Most catchments in tropical regions are ungauged and data deficient, complicating the simulation of water quantity and quality. Yet, developing and testing hydrological models in data-poor regions is vital to support water management. Here, we used the Soil and Water Assessment Tool (SWAT) to predict stream runoff in Halda Basin in Bangladesh. While the calibrated model’s performance was satisfactory (R2 = 0.80, NSE = 0.71), the model was unable to track the extreme low flow peaks due to the temporal and spatial variability of rainfall which may not be fully captured by using data from one rainfall gauging station. Groundwater delay time, baseflow alpha factor and curve number were the most sensitive parameters influencing model performance. This study improves understanding of the key processes of a catchment in a data-poor, monsoon driven, small river basin and could serve as a baseline for scenario modelling for future water management and policy framework.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Archaeology, Geography and Environmental Science > Department of Geography and Environmental Science
ID Code:87387
Publisher:Taylor & Francis

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