Surface Water Quality Analysis&Prevention And Control Scheme Of Wudalianchi Nature Reserve

Based on the water quality monitoring data of 2007-2018 years in the nature reserve,based on the water environmental function zoning,in accordance with the pri-nciples of scientificity,dynamism,comprehensiveness and pertinence,the index sys-tem of surface water environmental quality evaluation was constructed by combinin-g the main and objective methods,and the factors affecting the quality of the surface water environment were determined.Through the calculation of the amount of lake pollution into the lake,the causes of surface water pollution in the nature reserve are further summarized,and the targeted control measures are put forward.According to the temporal and spatial distribution law,the improvement of water quality from two to three was analyzed.The four indexes of two pools in 2013 were all higher than those of class V.In October 2013,the TP index was inferior to class V and the concentration was 0.215mg/L.In the three pool,the TP index in January 2009 was 1.27mg/L,exceeding the limit of class V,6.4 times to 2.In 2018,the first and the third pools were all type IV water bodies,but the environmental functions of the water areas were not classified as type III water bodies.The water pollution index assessment method was used to analyze the annual and monthly terms of the year.The results showed that the heavy pollution of one pool and three pools was in 2013 and 2009 respectively,and the heavier pollution months were January.COD is mainly agricultural pollution,accounting for 64% of the total pollution load into the lake,followed by soil erosion accounting for 32%,a small amount of domestic pollution and tourism pollution.TN is mainly agricultural pollution,accounting for 75% of the total pollution load into the lake,followed by soil erosion,accounting for 16% of the total pollution load into the lake,a small amount of domestic pollution and tourism pollution.TP is mainly agricultural pollution,accounting for 74% of the total pollution load into the lake,followed by domestic pollution,accounting for 17% of the total pollution load into the lake.Agricultural pollution and soil erosion are the main contributors to the load of COD,TN and TP in Wudalianchi.Through actual investigation and data access,the causes of pollution can be summarized as four aspects: point source,non-point source,internal source and soil erosion.In view of these four causes,taking the overall improvement of water quality as the goal,based on past research and practical protection,the "system control source-clean water into the lake-lake water ecological environment improvement-watershed management" is the main consideration.The idea of pollution prevention and environmental protection is to improve water quality in the short term by means of manual intervention.This study will play an important guiding role in the sustainable development of surface water environment in Wudalianchi.The research results will facilitate the scientific management and effective utilization of water resources and realize the benign circulation of surface water in Wudalianchi.