The use of GIS technology-based water quality safety in environmental impact evaluation

Abstract

In order to solve the water environment problems in China, it is necessary to rely on the adjust-ment of policy and scientific evaluation and prediction technology. After empirical research, the practical operation content of the geographic information system (GIS) applied to regional surface water environmental impact evaluation has been pointed out. Based on the environmental monitoring data, the computer software ArcView is used to analyze the spatial distribution of monitoring values of two evaluation parameters, biochemical oxygen demand and chemical oxygen demand in the water area and generate the regional isopleth. According to the evaluation standards of surface water, the water quality is analyzed to determine the spatial distribution of different grades of water quality. Finally, the problems that should be paid attention to in the application of GIS technology are put forward.