Abstract
The objectives of this study are to simulate pollutant runoff load into Lake Biwa using Macro Model and examine the runoff characteristics of pollutants. As a result of the simulations, runoff pollutant load in every river which flowed into Lake Biwa was calculated. And the runoff characteristics of pollutants during dry weather days and storm events from Lake Biwa basin were examined in consideration of the characteristics of the basin. In the results, some available knowledge concerned with the environmental management in Lake Biwa basin was obtained.
