Research On Nonpoint Source Pollution In Typical Region Of Yellow River Basin

In recent years, along with the social and economy fast developing and the utilization of water resources further enhancing, the volume of wastewater in Yellow River basin is increasing day by day. The water pollution problem in Yellow River basin is getting more serious. Previous studies on Yellow River basin water resources conservation primarily focused on the point source pollution control. However, the research on the nonpoint source pollution formation and control cannot be ignored, as it is also an important aspect within bearing capacity of water resource.This research focused on the nonpoint source pollution in two typical regions of Yellow River: the agriculture filled draws back region and the soil erosion region.1, Author chose three typical areas in the Ning xia Yellow river irrigation area to investigate and monitor the directing and drawing back water volume and the water quality, did simulation test of soil pollutant leaching in typical area, studied the hydrology at standing hydrological cross section, water quality monitor data, and other relative information in Xiaheyan irrigation area and Shizuishan in terminal. Through the generalized analysis and the macroscopic survey on the nonpoint source pollution of the agricultural irrigation draw back water at Ningxia irrigation area, author estimated the influence of draw back water to the Yellow River water quality in this area.2, By monitoring and analyzing the soil, silt, and water samples from the six typical branch basins (Wudinghe River, Kuye river, Huang Fuchuan in Yellow River coarse sand origin area and Weihe River, Luohe river (north Luohe river), Jinghe River which are fine sand origin areas), conducting the experiment of typical area soil sample's soaking and raising, and combining with years of hydrological data from the Yellow River and its typical branches, author carried out the generalized analysis on nonpoint source pollution in the soil erosion region and estimated the influence of soil erosion region to the Yellow River water quality.Through the investigation on different types of nonpoint source pollution in typical area in the Yellow River basin, author provided the estimating methods, technologies and measures to the quantity of contamination, further enriched the research in this field. This research can provide some technical supports to controlling nonpoint source pollution in the Yellow River basin, formulating and implementing the basin pollutant control plan, and protecting the Yellow River water resources.