유역토양수분 추적에 의한 실시간 홍수예측모형

Real-time Flood Forecasting Model Based on the Condition of Soil Moisture in the Watershed

  • 발행 : 1995.10.01

초록

One of the most difficult problem to estimate the flood inflow is how to understand the effective rainfall. The effective rainfall is absolutely influenced by the condition of soil moisture in the watershed just before the storm event. DAWAST model developed to simulate the daily streamflow considering the meteologic and geographic characteristics in the Korean watersheds was applied to understand the soil moisture and estimate the effective rainfall rather accurately through the daily water balance in the watershed. From this soil moisture and effective rainfall, concentration time, dimensionless hydrograph, and addition of baseflow, the rainfall-runoff model for flood flow was developed by converting the concept of long-term runoff into short-term runoff. And, real-time flood forecasting model was also developed to forecast the flood-inflow hydrograph to the river and reservoir, and called RETFLO model. According to the model verification, RETFLO model can be practically applied to the medium and small river and reservoir to forecast the flood hydrograph with peak discharge, peak time, and volume. Consequently, flood forecasting and warning system in the river and the reservoir can be greatly improved by using personal computer.

키워드

참고문헌

  1. 저수지 치수관리에 관한 연구 농림수산부
  2. 산지 소유역의 홍수 유출예측을 위한 모의발생 수문모형의 개발 v.30 no.3 권순국;고덕구
  3. 한국농공학회지 v.33 no.4 유역토양수분 추적에 의한 유출모형 김태철;노재경;박승기
  4. 한국농공학회지 v.36 no.4 영산호 운영을 위한 홍수예보모형의 개발(I) 박창언;박승우
  5. 한국농공학회지 v.33 no.1;2 장단기유출 양용 저류탱크모델의 개발에 관한 연구(I),(II) 이순혁
  6. Hydraulics and hydrology in the small computer age, ASCE Proceeding v.2 A microcomputer based real-time flood warning system Scott A. Brown(et al.)
  7. Case studies on realtime river flow forecasting G.Fleming
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