SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Modeling climate and landuse change impacts on streamflow and sediment yield of an agricultural watershed using SWAT 
Authors:Ndulue, E.L. and C.C. Mbajiorgu 
Journal:Agricultural Engineering International: CIGR Journal 
Volume (Issue):20(4) 
Article ID: 
URL (non-DOI journals):http://www.cigrjournal.org/index.php/Ejounral/article/view/4837 
Broad Application Category:hydrologic and pollutant 
Primary Application Category:climate change and land use change 
Secondary Application Category:sediment loss and transport 
Watershed Description:Upper Ebonyi river, located in south central Nigeria. 
Calibration Summary: 
Validation Summary: 
General Comments: 
Abstract:Quantifying the hydrological response due to changes in climate and land-use is imperative for the proper management of water resources within a watershed. The impact of climate and land-use changes on the hydrology of the Upper Ebonyi river (UER) watershed, South East Nigeria, was studied using the Soil and Water Assessment Tool (SWAT) hydrological model. A climatological time series analysis from 1985-2014 using non-parametric test showed significant negative trends in precipitation and relative humidity trend while minimum and maximum temperature, solar radiation and wind speed showed significant positive trends. Future hypothetical land-use change scenarios representing urbanization and conversion of forest to agricultural land were combined with future downscaled climate model (CSIRO-Mk3-6-0) and simulated in SWAT model. Scenario 1 represents urbanization and climate data of 2020-2030; Scenario 2 represents urbanization and climate data of 2040-2050; Scenario 3 represents conversion of forest to agricultural land and climate data of 2020-2030 and Scenario 4 represents conversion of forest to agricultural land and climate data of 2040-2050 while the Baseline Scenario is the present land-use and climate data of 2005-2014. Relative to the Baseline (2005-2014), the results showed a decrease in streamflow by 10.3%, 26.2%, 11.8% and 26.72% for Scenarios 1, 2, 3, and 4 respectively, while sediment yield decreased by 7.54%, 19.4%, 11.1% and 9.01% for Scenarios 1, 2, 3, and 4 respectively. The results suggest development of adaptation strategies to cope with the predicted hydrological conditions under future climate and land-use change in the watershed. 
Keywords:climate change, land-use change, swat model, hydrology, upper ebonyi watershed