Impact of the Ponds Regulation for the Nitrogen Discharge of Irrigation Area under the Future Climate Change
WU Di
CUI Yuanlai
Abstract：A distributed hydrological model based on SWAT2009 was constructed for Yangshudang basin in Zhanghe Irrigation Area.The model was used to simulate the water balance and non-point source pollution,and the impacts of future climate change on the nitrogen discharge in this region.Furthermore,the regulatory effect on nitrogen discharge was simulated by increasing the pond area in this region.The results showed that the nitro-gen discharge in this region was significantly increased under the future climate scenarios.Whereas,by increas-ing the pond area in this region under the future climate scenarios,the runoff could be greatly cut down,and the nitrogen discharge could be kept as the same to present situation or even less.By increasing the pond area in the irrigation area would be a valid way to control the nitrogen discharge under future climate scenarios.According to the decreasing rate of the nitrogen discharge from paddy rice field or basin outlet under the future climate sce-narios by increasing the pond area,in order to ensure the nitrogen discharge same to present,increasing the pond area by 30%would be reasonable for Zhanghe Irrigation Area.
Keywords：non-point source pollutionSWAT modelclimate changenitrogenpond
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 20-24 )