Study On Regional Water Pollution Control Based On MIKE11

With the continuous exploitation and utilization of water resources,the river water ecological environment is gradually destroyed and the pollution problem is becoming more and more serious.It is of great significance to study the water environment capacity of water body.Firstly,the single factor evaluation method and principal component analysis method are used in this paper to analyze the pollution status of nanning city.Based on the water quality model Mike11,the COD and NH3-N are used as the research indexes,a water quality model for the yongjiang waters of nanning city is established to simulate the spatial and temporal evolution of target pollutants.Secondly,the analytical formula and model test are used to calculate the water environment capacity of yongjiang river.The environmental capacity of NH3-N in the shajiang river,the santang and the liangqing river are-36.14 t/a,-583.48 t/,-63.72t/a,so corresponding measures should be taken to improve the water quality.The water environment of the zhupai river,sitang river,bachi river,the pinghua river,the fenghuang river,the liangeng river,natan river is moderate.The water environment of yongjiang is large and the water quality is good.According to the calculation results of the residual capacity of water environment,the remaining water environment in the study area is seldom except bachi river of inland water.Finally,based on the calculation results of the remaining environment capacity,the water quality of sewage treatment plant is adopted to reduce the water quality of the study area.And the established water quality model is used to verify this reduction plan,the results prove that the effect of the reduction plan is relatively good.It can provide some technical support for the development of the discharge standard of nanning sewage treatment plant.