期刊
WATER
卷 9, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/w9010007
关键词
water balance; evapotranspiration; irrigation district; Soil and Water Assessment Tool
资金
- National Natural Science Foundation of China [41601019]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [15HASTIT046]
- Science and Technology Project of Henan Province [152102110095]
- Key Scientific Research Project of Henan Province Universities [15A570008]
- North China University of Water Resources and Electric Power high-level personnel starting project [201214]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据