Study On The Impact Of Surface Water Environment Caused By The Groundwater Pollution Of Agricultural Region

In vast rural areas, over used chemical fertilizers and pesticides, livestock,aquaculture and other activities have become the main reason of rural waterenvironment pollution, and caused the surface water deterioration andgroundwater pollution, etc. As an important part of environmental system,groundwater water supplys to the river directly, and nitrogen and phosphoruspollutants are discharged into the surface water as well, it is the importantinfluence factors of the water-body eutrophication acceleration.Based on the basis investigation of groundwater environment condition,domestic and international research evaluation theory and method issynthesized, the agricultural region’s characteristics are combined, a set ofindex system about surface water environmental impact of groundwaterpollution in agricultural region is initially set up, the general study methodsabout surface water environmental impact of groundwater pollution inagricultural region are discussed. The ecological growing farmland region ofthe ecological network experimental station in Qianyan zhou, Jiangxi Provinceis considered as case area, the groundwater flow field and total nitrogenmigration is simulated using the Visual MODFLOW numerical simulationsystem; and the total nitrogen concentration that groundwater rechargessurface water Jiazhu River is forecasted at a period of time; the differentscenes of rainfall, fertilizer amount, conductivity, K-mobile coefficient,Dispersion are simulated, the sensitivity of influence factors is analyzed,it is concluded that the fertilizer ammount is the main control factors. Thedevelopment of the work is of some theoretical and practical significance tothe water environment sustainable development of the agricultural productionarea in our country.