A STUDY ON THE INTEGRATION OF BASIN INFORMATION AND APPLICATION FOR ESTIMATION OF POLLUTION LOAD USING GIS

This paper focuses on the estimation of pollution loads by integrating various kinds of information in GIS through its effective function. In this paper, we report on the method used and the results obtained. First, information about the water environmental information was stored before and after the Development Project in the Lake Biwa basin to reproduce the cycle and movement of water and pollutants. Next, the emission of pollution loads from all sources, including point and non-point sources was determined. And we evaluate the effect of the development and the countermeasures on the water environment by comparing the estimated load before and after the project.