Calculation Model Of Water Environment Capacity Of River And Visual System Development

In the context of the continuous development of urbanization and industrialization in China,a large amount of waste water has been discharged into rivers,lakes and other waters,which results in deterioration of water quality.At present,the destruction of water ecological environment has attracted the attention of governments,scientists and the public.In order to better improve and manage the water ecological environment,researchers have established numerous water quality models through long-term research.However,these models generally involve many parameters and complex calculations,and the individual result values cannot be combined with the spatial information of the study area for analysis in these models,which produce some difficulties to the promotion and application of the water quality model.Therefore,the data needs to be automatically processed and integrally displayed with spatial information.This thesis chose calculation model of water environment capacity,and selected ArcGIS as the development platform and Python as the scripting language,to study visualization system of the model.The main research results are as follows:?1?The calculation model of water environment capacity realized the convenience function to search and manage data for users,and the automation of data processing and calculation.More importantly,the spatial information and attribute data of the study area were integrated into the integrated visual display in the ArcGIS interface,which provided decision-making basis for relevant managers.?2?The pollution capacity of Fuhe River in Wuhan without generalized sewage outlet under the zero-dimensional,one-dimensional,and two-dimensional models of the river were obtained;and through analysis,the calculation results under the one-dimensional model of the river were selected as water environment capacity of the river section.The water environment capacity of COD of Fuhuan River in Wuhan was 58228.21t/a,and NH₃-N was-12745.62t/a.?3?In addition,this thesis studied the water environment capacity under conditions of non-generalization,center of gravity generalization and midpoint generalization of the sewage outlet.It was found that the calculation results under the center of gravity generalization were closer to those under non-generalization,which meant that compared with the midpoint generalization,the center of gravity generalization was closer to the actual situation of the sewage outlet.