Abstract
In this studs, hydraulic routing model has been developed to predict the water level and discharge in each river section with considering the full interaction between surface runoff and river flow. It improved the computation of flood runoff by reflecting the shape of hydrograph that was determined by the geological and flood characteristics, and the excessive computation of the peak discharge was eliminated by considering the effect of infiltration. The Inflow from surface runoff to river flow was applied to the equation of continuity by implementing effectively the flow in a number of river section, and resulted in a numerical stability at the rapid variation of rainfall. Measurements were conducted during heavy rain in the watershed area of Yang-Yang Namdae-Chun. The present model was tested to the field, and the computed results were compared to the observed data. Its applicability was confirmed with its verification.
본 연구에서는 지표면유출과 하천유출의 실시간 연계를 통하여 하천 각 구간에서의 수위와 유량을 예측하는 수리학적 홍수추적 모형을 개발하였다. 주로 유역의 지형특성에 따라 결정되는 수문곡선의 형상을 반영하여 홍수 유출량 산정방법을 개선하였으며, 침투과정을 고려하여 강우초가 첨두유량의 과다산정을 제거하였다. 지표면유출의 하천유입을 연속방정식에 반영하여 여러 단면에서의 유입이 용이하였으며, 이는 강우의 급격한 변이에서도 수치적 안정을 가져다 주었다. 폭우시 양양 남대천 유역에서 현장 관측을 실시하였으며, 관측자료에 적용하여 개발된 모형의 현장 적용성과 신뢰성을 확보하였다.
