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 |
Year: | 2017 |
Journal: | Water |
Volume (Issue): | 9(1) |
Pages: | |
Article ID: | 7 |
DOI: | 10.3390/w9010007 |
URL (non-DOI journals): | |
Model: | SWAT |
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. |
Language: | English |
Keywords: | water balance; evapotranspiration; irrigation district; Soil and Water Assessment Tool |