Pollutant Runoff Mechanism from Watershed under the Rain Condition and Its Modeling
抄録
In order to effectively carry out the water environmental management, it becomes necessary to know the pollutant runoff mechanism from the non-point sources, especially under the rain condition, and also to estimate the runoff rate about not only the stormwater but pollutant loads distributed over the watershed, considering the rainfall-runoff relationship. In this paper, field data about the nitrogenous pollutant runoff have firstly been introduced, executing at the Honmyo river, A-class river in Nagasaki. Afterward, above data have been discussed from several kinds of viewpoints, including those through a mathematical model. Finally, developed model has been proven to be available for estimating the diffuse pollution from the watershed.