SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Hydrologic simulation of a winter wheat–summer maize cropping system in an irrigation district of the Lower Yellow River Basin, China 
Authors:Liu, L., J. Ma, Y. Luo, C. He and T. Liu 
Volume (Issue):9(1) 
Article ID:
URL (non-DOI journals): 
Broad Application Category:hydrologic only 
Primary Application Category:irrigation impacts or irrigation BMP scenarios 
Secondary Application Category:crop, forest and/or vegetation growth/yield and/or parameters 
Watershed Description:32 field experimental plots located near the city of Yucheng in Shandong Province in eastern China. 
Calibration Summary: 
Validation Summary: 
General Comments: 
Abstract:Conflicts between water supply and water demand are intensifying in irrigation districts along the Lower Yellow River due to climate change and human activities. To ensure both adequate food supply and water resource sustainability in China, the Soil and Water Assessment Tool (SWAT) model was used to simulate the water balance and water use of agro-ecosystems in an irrigation district of the lower Yellow River Basin, China. Simulated average annual irrigation requirements decreased from 1969 to 2010. Irrigation requirements during the winter wheat season decreased owing to reduced reference evapotranspiration and increased precipitation. Annual evapotranspiration (ET) increased with increasing irrigation volume, and differences among irrigation scenarios were mainly due to ET of winter wheat. Water deficit typically occurred during winter wheat seasons with less precipitation. Field seepage and surface runoff tended to occur in years with high precipitation, particularly during the summer maize season under full irrigation and scheduled irrigation scenarios. Frequent and heavy irrigation did not always lead to high water use efficiency. To cope with limited water resources in this region, it is necessary to properly irrigate crops based on soil water content and take full advantage of precipitation and surface runoff during the summer maize season. 
Keywords:water balance; evapotranspiration; irrigation district; Soil and Water Assessment Tool