The construction study of water environment evaluation system on the basis of GIS and ANN

This article constructs the integrated evaluation system on the basis of GIS secondary development. Through spatial expression ability of GIS, we make overall situation of water quality and variation tendency more clear to the administrators. For different years and monitoring sections, through the menu, we can easily obtain monitor water quality values from backstage supported database, and calculate the evaluation value through model in the model-base automatically, then come out to show directly at electronic map. All these can realize the integration of many functions: evaluation work of water quality, spatial analysis, automatic calculation, etc, greatly improve working efficiency of water quality evaluation.