하천수위에 의한 침수피해 평가 시스템

Abstract

1) 기존 모형을 이용하여 침수분석을 할 수 있도록 체계화 하였고 강우에서부터 침수피해액까지 하나의 시스템에서 침수분석을 할 수 있도록 시스템(K-FDAS)화 하였으며, 행정구역별, 토지이용별, 침수심별로 구분된 면적에 의해 침수피해액 산정을 위한 프로그램(FDEM)을 개발하였다. 2) 대도시, 중소도시, 농촌지역으로 구분하여 침수면적에 따라 피해액을 산정 할 수 있도록 함수식을 제시하였다. 3) 비교적 조사 자료가 신뢰성이 있다고 판단되는 태풍 Rusa때 실측 조사와 모의발생 사이에서 침수면적은 약 9 % 차이를 보였고 침수피해액은 약 7 % 차이를 나타내었다. 4) 태풍 Rusa때 침수규모는 부정류 해석으로 첨두 홍수량 발생 시간에 따른 침수 면적이 실제 조사 면적과 가장 유사하게 산출되었다. 여기서 제시된 K-FDAS 및 함수식은 하천수위에 의한 침수평가 시스템으로 하천 실무에서 경제성 분석, 기본계획 등에 적용 가능 할 것이다.

Many people have been suffering and loosing their property from concentrated rain and massive storm. Although, river banks are strengthened and pumping stations are constructed to protect the life and property of people, the flood disaster could not be controlled, in fact it is increasing. In USA, CWMS (Corps Water Management System) has very good system of integration of study of rainfall data, computation of flood level and simulation of flood disaster, but there is lack of this type of study and analysis in the domestic context, so we have been facing many difficulties in simulation of flood disasters. Therefore, a systematic collecting of data, analysis and evaluation of flood damage is felt necessary. The main objective of this study is to suggest a systematic data collection and evaluation method, which could be useful to prevent the life and property from unusual disasters. In this study, the system (Flood Damage Evaluation Model; FDEM) is proposed to evaluate the flood damage from rainfall with considering many field parameters. The results of this study have been summarized as follows: 1) The process for analyzing inundation systematically (Flood Damage Analysis System; K-FDAS) was given by combining the various existing simulation models used in the domestic field. 2) Estimation of inundation damage can be easily computed by using FDEM which is consisted of Visual C++6. 3) A functional equation is suggested to compute flood damage according to different size of residential areas, megapolis, medium city and small towns. 4) A good agreement was found between the surveyed inundated areas and simulated inundated areas by typhoon Rusa. It showed about 9% difference between these two results. 5) It showed about 7% difference between the surveyed flood damage and simulated flood damage on typhoon Rusa. 6) Considering a tidal level, it showed that simulated flood area was the most similar to that of surveyed area when the out level peak flood was come used as cardinal level. Therefore, the result of this study(K-FDAS, FDEM), showed a good application to economic and feasibility study in the flood damage evaluation. It is hoped that the results would be helpful to analyze the flood damages effectively and reduce the loss of the life and property.