SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Evolution of drought–flood abrupt alternation and its impacts on surface water quality from 2020 to 2050 in the Luanhe River Basin 
Authors:Bi, W., B. Weng, Z. Yuan, Y. Yang, T. Xu, D. Yan and J. Ma 
Journal:International Journal of Environmental Research and Public Health 
Volume (Issue):16 
Article ID:691 
URL (non-DOI journals): 
Broad Application Category:hydrologic and pollutant 
Primary Application Category:drought assessment 
Secondary Application Category:flood impacts and/or processes 
Watershed Description:44,750 km^2 Luanhe River, which is a tributary of the Haihe River and drains portions of Hebei Province, Liaoning Province and Inner Mongolia Autonomous Region in northeast China. 
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Abstract:It has become a hot issue to study extreme climate change and its impacts on water quality. In this context, this study explored the evolution characteristics of drought–flood abrupt alternation (DFAA) and its impacts on total nitrogen (TN) and total phosphorous (TP) pollution, from 2020 to 2050, in the Luanhe river basin (LRB), based on the predicted meteorological data of the representative concentration pathways (RCPs) climate scenarios and simulated surface water quality data of the Soil and Water Assessment Tool (SWAT) model. The results show that DFAA occurred more frequently in summer, with an increasing trend from northwest to southeast of the LRB, basically concentrated in the downstream plain area, and the irrigation area. Meanwhile, most of the DFAA events were in light level. The incidence of TN pollution was much larger than the incidence of TP pollution and simultaneous occurrence of TN and TP pollution. The TN pollution was more serious than TP pollution in the basin. When DFAA occurred, TN pollution almost occurred simultaneously. Also, when TP pollution occurred, the TN pollution occurred simultaneously. These results could provide some references for the effects and adaptation-strategies study of extreme climate change and its influence on surface water quality. 
Keywords:drought–flood abrupt alternation, tempo-spatial evolution, surface water quality, model simulations, Luanhe River Basin