抄録
Various pollutants caused by urban activities are accumulated in our environment, and the accumulated pollution loads have a great amount of potential for the water pollution. According to the occurrence of rainfall, these pollution loads are flushed out through a road surface and gutters etc., and the loads are directly flowed into the receiving water, where the pollution loads are increased.
For the purpose of reducing these nonpoint-pollution loads, we must firstly survey the quantity of accumulated load amount of the road surface, we investigate the composit and the local distribution of accumulated load amount, and we must examine how these loads are flushed out by rainfall.
In this paper, in the first half, the accumulated load amount is determined and the characteristics of the accumulation are examined in each use area. In the latter half, runoff characteristics of accumulated loads by rainfall are considered by simulating the runoff accumulated load amount.
The accumulated load amount of the road surface is determined in each use area, and it has become clear that the accumulated load amount of the road surface has a large difference among each use area and that it is flushed out in great quantities at comparatively initial rainfall. It is concluded that in this way we will be able to simulate the runoff accumulated loads of the road surface, and we can obtain a useful information on the prevention of water quality.
