Study Of Non-point Source Pollution Of Nitrogen And Phosphorus Nutrients In Tumen River Watershed On SWAT

Water pollution can be divided into point source pollution and non-point source pollution. Non-point source pollution in the effective point source pollution control,increasing the harm revealed.Non-point source pollution with a wide range of temporal and spatial distribution, spatial variations,uncertainties,and difficult access to information,the process of composition and migration characteristics of complex and changeable,and they produce more harmful,research,control and management are more difficult,has attracted wide attention.This paper focuses on the use of the U.S.Department of Agriculture(USDA) Agricultural Research Center(ARS) research and development of distributed hydrological model SWAT Yanbian system components of the Tumen River Basin states of nitrogen and phosphorus non-point source pollution study on the SWAT model Tumen River Basin in the applicability of the corresponding research and evaluation,but also the initial establishment of the Tumen River basin non-point source pollution databasem In this paper,to explore the nutrients nitrogen and phosphorus non-point source pollution as the main goal of simulation to study the relevance of the content include:1 The use of SWAT model for the Tumen River basin nutrient nitrogen and phosphorus non-point source pollution simulation study of nitrogen and phosphorus,and other non-point source pollutants in the Tumen River Basin in the temporal and spatial distribution.2 To study the SWAT model was applied to the Tumen River basin simulation of non-point source pollution applicability.SWAT model has powerful features such as high-performance computing,and simulation based on the physical process calculus for non-point source pollutants to explore the migration and distribution of great help.Of the SWAT model through the adjustment of sensitive parameters,particularly the enhancement of the Tumen River basin simulation of non-point source pollution accuracy.3 The Tumen River basin to identify non-point source pollution of nitrogen and phosphorus nutrients and pollution contribute to the key areas for further study based on providing relevant.In this paper,the Tumen River basin during the non-point source pollution studies,water system in accordance with the relevant hydrological characteristics of the Tumen River basin will be divided into five regional study of nitrogen and phosphorus nutrients on the relevance of simulation,by the following conclusions:1 The application of SWAT model to the Tumen River basin of nitrogen and phosphorus to study non-point source pollution is feasible.SWAT model on the Tumen River Basin in the non-point source pollution study the applicability of the study,confirmed that the model can be applied to the Tumen River basin simulation of non-point source pollution,the simulation accuracy and the acceptable limit.2 The initial establishment of the Tumen River basin non-point source pollution-related databases,through the use of meteorological and hydrological data and related non-point source pollution data to establish the Tumen River Basin database of non-point source pollution,in order to continue to develop after the creation of a certain conditions.3 In the Tumen River basin nutrient nitrogen and phosphorus non-point source pollution are mainly located in the key areas Hailanhe River,Gayahe River and Buerhatonghe River near the intersection region,that this is due to human economic and social development of the exposed land,lack of water and soil and measures of vegetation,resulting in serious soil erosion,the formation of nitrogen and phosphorus nutrient non-point source pollution critical areas.