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영어

The purpose of this study was investigated to runoff characteristics and unit pollutant load of nonpoint source of first runoff from road during storm event. Road runoff generally contains significant loads of micro-particles, heavy metals and organic constituents. There were two major objectives of this study. The first objective was to characterize pattern of road runoff. The second objective was to estimate of the unit pollutants load from the road first runoff. First flush runoff for four storm events was monitored on three sites of road areas in Daejeon along with traffic volume. The quantity of road runoff and quality constituents, including chemical oxygen demand(CODcr), sus-pended solids(SS), biological oxygen demand(BOD5), total nitrogen(T-N), total phosphorus (T-P), heavy metals were analyzed. The results showed that the event mean
concentration(EMC) of BOD5, CODcr, SS, T-N, T-P, Fe, Cu, Cr, Zn, Pb average rages were 66 mg/L, 272 mg/L, 263 mg/L, 13.77 mg/L, 0.52 mg/L, 8.937 mg/L, 0.130 mg/L, 0.113 mg/L, 0.616 mg/L, 0.171 mg/L, respectively. The average unit pollutants load for first runoff from road BOD5, CODcr, SS, T-N, T-P, Fe, Cu, Cr, Zn, Pb were 102, 298, 552, 23.4, 0.77, 17.24, 0.47, 0.09, 1.18, 0.58 g/a/day, and 1.243, 3.685, 3.282, 0.180, 0.009, 0.115, 0.002, 0.002, 0.010, 0.0035 g/a/mm, respectively.