Study On The Simulation Of Agricultural Non-Point Source Pollution In Jiangchuan Farm

At present, water pollution has become one of a serious pollution impact on the survival of mankind. This paper mainly research the agricultural non-point source pollution on JiangChuan farm. At first, investigate and calculate the main agriculture non-point source pollution element N,P emissions and burden . Then in the situation of investigate the whole farm in detail, studies the agricultural non-point source pollution on JiangChuan farm with AnnAGNPS model, Based on that we made the control methods and countermeasures on the farm, The main results as follows:(1) By collection of three consecutive years of water quality data on JiangChuan farm , we use gray clustering method to evaluate the water quality data , the results shows that all the water pollution level are above III,most of them are IV,so the water pollution is very serious.(2) Estimated the man-made factors on the farm caused by non-point source pollution burden , in study time enter the water's TN is107.67t/yr,TP is 12.73t/yr, among that, the agricultural non-point source pollution take up 96% of the whole pollution, is a major source of Non-point source pollution(3) By studies the agricultural non-point source pollution on JiangChuan farm with AnnAGNPS model, we obtain the space distribution of TN,TP and sediment on JiangChuan farm . moreover ,we also obtain the time distribution and distribution of TN,TP and sediment on JiangChuan farm, the results is :TN is 439.3t/yr, TP is 28.7t/yr, sediment is 22387.6t/yr(4) According to the characteristics of non-point source pollution on JiangChuan farm ,give some effective and feasible measures.