• Korean Journal of Hydrosciences
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• 제4권
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• pp.11-19
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• 1993

The peak flood discharge at a downstream station and the flood travel time between a pair of dams due to a specific flood release from the upper reservoir are computed using a hydraulic river channel routing method. The study covered the whole large reservoir system in the Han River, Korea. The computed flood discharges and the travel times between dams were correlated with the duration and the magnitude of flood release rate at the upstream reservoir, and hence a multiple regression model is proposed for each river reach between a pair of dams. The peak flood discharge at a downstream location can be converted to the peak flood stage by a rating curve. Hence, the proposed regression model could be used to forecast the peak flood stage at a downstream location and the flood travel time between dams using the information on the flood travel time, release rate and duration from the upper dam.

• 한국지반환경공학회 논문집
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• 제14권11호
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• pp.55-63
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• 2013

농업용 저수지의 경우, 인위적인 홍수조절 기능이 없어 홍수 발생 시 급격한 저수지 수위상승에 따른 월류로 인해 제체의 파괴위험이 높고, 예 경보 없이 상류에서 유입되는 홍수량을 그대로 방류하여 하류 지역에 농경지 침수 등 홍수피해가 발생할 위험성이 높다. 본 연구에서는 경상북도 상주시에 위치한 지평저수지를 대상으로 수문분석을 실시하여 설계홍수량(200년 빈도의 1.2배)을 산정하고, 저수지 추적기법을 통해 기존 여수로와 사이펀 여수로 설치에 따른 저수지 홍수조절능력을 비교 분석하여 사이펀 여수로의 홍수조절 효과를 분석하였다. 그 결과, 지평저수지의 설계홍수량은 $284.3m^3/s$, 로 산정되었으며, 사이펀 여수로의 사전방류를 통해 수위가 약 40cm 정도 하강하고 방류량은 $91m^3/s$, 정도 감소하는 것으로 분석되었다.

• 한국수자원학회논문집
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• 제36권2호
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• pp.325-343
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• 2003

본 연구는 설계확률강우량에 대한 다양한 강우의 시간적 분포유형을 시화호 유역에 적용하여 강우분포유형에 따른 유출특성을 비교 분석하였으며 시화호의 저수지 추적을 통하여 저수위에 미치는 강우분포유형의 특성을 분석하였다. 저수지추적시 외조위 조건을 고려하였으며, 저수위를 산정할 수 있는 프로그램(IWSEA)을 개발하였다. 연구결과를 요약하면 저수지 유입 홍수유량은 Mononobe분포식을 적용할 때 제일 크게 나타났고, 최고저수위는 외조위 조건이 소조일 때, 강우분포유형을 Pilgrim-Cordery방법을 적용하였을 때 가장 높게 나타났다.

• 한국농공학회지
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• 제6권1호
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• pp.721-736
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• 1964

Flood routing is one of the most important engineering problems for the design of a spillway, and the procedures for the routing should be thoroughly understood by the engineers engaged in the planning of a spillway. There are many methods for the flood routing such as Muskingum, Steinberg, Puis, Holton, Goodrich, Rutter, Graves, Snyder, etc., which are being used in many countries. This article introduces the theory of the modified PuIs Method in detail which is exclusively being used in the Bureau of Reclamation, Department of Interior, U.S.A. Also, this article includes a routing example worked by the writter for the Ee-dong Reservoir of the Ki-ho Irrigation Association. in Kyong-gi Province.

• 한국수자원학회논문집
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• 제38권9호
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• pp.747-760
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• 2005

본 연구에서는 한강수계를 대상으로 1차원 동역학적 홍수추적모형인 DAMBRK 모형을 이용하여 상류댐 및 중간댐의 영향을 고려한 홍수추적을 실시하였다. 또한 중간댐에서의 홍수추적기법의 타당성을 검토하기 위해서 다양한 형태의 가상의 저수지에 대한 dynamic routing과 storage routing에서의 유출량을 검토하였다. 모형의 적용성을 검증하기 위해서 1990년 9월 및 1995년 8월 홍수사상에 대한 홍수추적을 실시하여 실측값과 비교${\cdot}$검토하였다. 한강수계에 극한홍수사상과 각 하천의 설계홍수량을 적용하여 중간댐들의 영향을 고려한 홍수추적을 수행하여 그 결과를 도시하였다. 본 연구를 통해서 향후 한강유역에서의 홍수예경보와 효율적인 홍수조절을 통한 홍수정보시스템 확립에 크게 기여할 것으로 판단된다.

• 물과 미래
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• 제25권3호
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• pp.115-124
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• 1992

상류댐에서의 홍수량에 의한 하류지점에서의 첨두 홍수량과 홍수 도달 시간은 수리학적 홍수추적방법에 의해 계산될 수 있다. 본 연구는 한강 유역의 전구간을 대상으로 시행되었다. 계산된 춤두 홍수량과 댐사이의 홍수도달시간은 상류에서의 방류계속시간과 바류량의 크기에 관련되어 있고 각 댐구간 사이에서 이 관계를 이용하여 다중회기모형을 제안하였다. 댐하류에서의 첨두홍수량은 수위-유량 관계식에 의해서 첨두홍수위로 변환될 수 있다. 그러므로, 제안된 다중회기모형은 상류댐에서의 홍수 방류량과 방류 계속시간에 의한 하류지점에서의 첨두홍수위와 댐구간 사이의 홍수도달시간을 예측하는데 이용될 수 있을 것이다.

• 한국농공학회논문집
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• 제56권6호
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• pp.103-111
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• 2014

This study was to develop the flood analysis module (FAM) for implementation of a web-based real-time agricultural flood management system. The FAM was developed to apply for an individual watershed, including agricultural reservoir. This module calculates the flood inflow hydrograph to the reservoir using effective rainfall by NRCS-CN method and unit hydrograph calculated by Clark, SCS, and Nakayasu synthetic unit hydrograph methods, and then perform the reservoir routing by modified Puls method. It was programmed to consider the automatic reservoir operation method (AutoROM) based on flood control water level of reservoir. For a $15.7km^2$ Gyeryong watershed including $472{\times}10^4m^3$ agricultural reservoir, rainfall loss, rainfall excess, peak inflow, total inflow, maximum discharge, and maximum water level for each duration time were compared between the FAM and HEC-HMS (applied SCS and Clark unit hydrograph methods). The FAM results showed entirely consistent for all components with simulated results by HEC-HMS. It means that the applied methods to the FAM were implemented properly.

• 한국농공학회논문집
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• 제54권3호
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• pp.103-111
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• 2012

Works for dam heightening plan have dual purposes: flood disaster prevention by securing additional storage volume and river ecosystem conservation by supplying stream maintenance flow. Now, the dam heightening project is in progress and there are 93 dam heightened reservoir. After the dam heightening project, 2.2 hundred million ton of flood control volume in reservoirs will be secured. Thus it is necessary to evaluate the effects of the dam heightening project on watershed hydrology and stream hydraulics, and resulting flood damages. This study was aimed to assess the impact of outflow from the dam heightened reservoir group on the Whangryong river design flood. The HEC-HMS (Hydrologic Engineering Center-Hydrologic Modeling System) model was used for estimating flood discharge, while HEC-5 (Hydrologic Engineering Center-5) was used for reservoir routing. This study analysed flood reduction effect on 100yr and 200yr return periods about the before and after heightening of agricultural dams. Based on the results of this study, the reduction of flood peak discharge at downstream of the reservoir group was estimated to be about 41% and 53% for 100yr and 200yr frequencies, respectively.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2006년도 학술발표회 논문집
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• pp.884-888
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• 2006

A system was developed to size flood detention storages at the planned Dangjin residing district. Components of system is consisted of module for deriving relationship between elevation and storage, module for calculating sediment elevation, module for setting outflow sizes and elevations, module for reservoir flood routing, and module for ascertaining sizes of detention facilities. And a system was constructed with Visual Basic 6.0. Using this system, sizes of flood detentions are able to be determined very easily and rapidly only by pushing command buttons and by viewing results.

• 한국환경과학회지
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• 제14권11호
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• pp.995-1004
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• 2005

As a research establish reservoir safety operation for small dam systems. This study presents hydrologic analysis conducted in the Duckdong and Bomun dam watershed based on various rainfall data and increase inflow. Especially the Duckdong dam without flood control feature are widely exposed to the risk of flooding, thus it is constructed emergency gate at present. In this study reservoir routing program was simulation for basin runoff estimating using HEC-HMS model, the model simulation the reservoir condition of emergency Sate with and without. At the reservoir analysis results is the Duckdong dam average storage decrease $20\%$ with emergency gate than without emergency gate. Also, the Bomun dam is not affected by the Duckdong flood control augmentation.