SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Hydrological components variability under the impact of climate change in a semi-arid river basin 
Authors:Zhang, X., Y. Xu, F. Hao, C. Li and X. Wang 
Volume (Issue):11(6) 
Article ID:1122 
URL (non-DOI journals): 
Broad Application Category:hydrologic only 
Primary Application Category:blue, green and/or gray water, or crop water productivity 
Secondary Application Category:climate change 
Watershed Description:44,750 km^2 Luanhe River, which drains to the Bohai Sea located in Hebei Province in northeast China. 
Calibration Summary: 
Validation Summary: 
General Comments: 
Abstract:With increased attention paid to the changes of global climate, the impacts on hydrological processes remain poorly understood in specific basins. In this study, we selected Luanhe River Basin, which is an important source of water supply to Beijing and Hebei, as a case study for the analysis of the combined impact of precipitation and temperature change to hydrological components in a semi-arid river basin. This study investigated the change of the blue water flow (BWF), green water flow (GWF), and green water storage (GWS) by employing the SWAT (Soil and Water Assessment Tool) model and stochastic methods in different time scales during 1960 to 2017. The contribution of climate changes to hydrological change were quantified by 16 hypothetical scenarios by recombining climatic data. The results show that the annual daily maximum and minimum temperature (Tmax, Tmin) increased while their differences (DTR) decreased. However, there was no significant trend in annual precipitation and hydrological components. The trend of precipitation has a positive impact to the change of all three hydrological components. Although precipitation contributes more to changes in hydrological components, more attention also needs to be given to the change of DTR, which has positive impact of GWF that contrasts with that of BWF and GWS. Seasonal scale studies of these changes suggested that more attention should be paid to the climate change in spring and winter when the hydrological components were more sensitive to climate change. Our results summarized hydrological components variability under the impact of climate change and demonstrated the importance of analyses at different time scales, which was expected to provide a reference for water resources management in other semi-arid river basins. 
Keywords:hydrological components; climate change; SWAT model; attribution analysis