HEC-HMS 모형과 HEC-GeoHMS 모듈을 이용한 농업소유역의 홍수유출 해석
Flood Runoff Analysis for Agricultural Small Watershed Using HEC-HMS Model and HEC-GeoHMS Module
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초록
본 연구에서는 농업소유역에서의 홍수량을 추정하기 위해 미공병단에서 개발한 HEC-GeoHMS와 HEC-HMS를 이용하였으며, 시험유역을 대상으로 모형을 적용하고 실측자료와 비교하여 모형의 적용성을
Abstract
This paper documents recent efforts to validate the GIS-based hydrologic models, HEC-HMS and HEC-GeoHMS by the US Army Corps of Engineers. HMS and Geo-HMS were used to simulate storm runoff from a small rural watershed, the Balan HS#6. The watershed is 3.85 km2 in size. The watershed topographic, soils, and land use data were processed using the GIS tool for the models. Input parameters were retrieved and calibrated with the field data. The simulated peak runoff, time to peak, and total direct runoff for twenty three storms were compared with the observed data. The results showed that the coefficient of determination (R2) for the observed peak runoff was 0.95 and an error, RMSE, 3.08 m3/s for calibration stages. In the model verifications, R2 was 0.89 and RMSE 6.79 m3/s, which were slightly less accurate than the calibrated data. The simulated flood hydrographs were well compared to the observed. It was concluded that HMS and GeoHMS are applicable to flood analyses for rural watersheds.