THE CHARACTERISTICS AND MEASURING TECHNIQUE OF REFRACTORY DISSOLVED ORGANIC SUBSTANCES IN URBAN RUNOFF

The authors investigated the organic matter in the first flush of stormwater runoff from a road in the watershed area of the lake, and studied the possibility of improvement in the water environment from that aspect. After percolating the stormwater through soil, we analyzed organic substances fractionated by using GPC-TC. They examined the effect of removal of organic substances by comparing the peak height before and after percolation. In the result of the experiments, and found that soil infiltration reduced the refractory dissolved organic substance and we successfully designed a system for a simple and easy experimental facility to treat urban runoff.