Abstract
A surface water quality analysis and pollutant diffusion simulation system was studied and developed using WebGIS. This paper introduces the structural design, technology development and main functions of the system. Using Liyang City of Jiangsu Province as an example, an environmental water monitoring database was established. Based on the database, a comprehensive analysis and evaluation of water quality in Liyang City were determined and provided decision support for pollution management. In addition, two authoritative water pollution diffusion analysis models (including a one-dimensional model and a two-dimensional model) were integrated, and a dynamic simulation of water pollution accidents was constructed with the support of GIS technology.
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