Abstract
Rainfall data is measured by rain gauge and the effects of wind speed on the data have not been considered when the data is dis-tributed. The calculated runoff using there rainfall data could be underestimated or overestimated. In this study, therefore, the rainfalldata was calibrated using the wind speed, and the runoff was analayzed in the Geum Cheon catchment which has impervious areamore than 90% of the catchment. SWMM model was used to calculate the runoff. Runoff characteristics were analyzed in dry, wet,and entire period. In wet period, the peak discharge has increased about 1.3 times than the runoff in dry period. The amount of totaldischarge in wet period has increased upto 1.3 times as well. The amount of rainfall and runoff has increased as the wind speedincrease. Therefore, when stormwater pipes are designed, the wind speed should be considered to avoid underestimated runoff cal-culation which could cause urban flood.Key words : Effect of wind speed, Urban runoff calculation, Calibration of runoff, Stormwater pipe design
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