• Water for future
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• v.50 no.11
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• pp.51-55
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• 2017

• Proceedings of the Korea Water Resources Association Conference
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• 1989.07a
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• pp.79-82
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• 1989

• Water for future
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• v.8 no.2
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• pp.6-12
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• 1975

• Water for future
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• v.16 no.3
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• pp.142-147
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• 1983

• Water for future
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• v.16 no.4
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• pp.199-203
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• 1983

• Proceedings of the Korea Water Resources Association Conference
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• 1985.07a
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• pp.7401-7412
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• 1985

• Water for future
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• v.55 no.7
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• pp.6-13
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• 2022

• Water for future
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• v.18 no.2
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• pp.143-152
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• 1985

A method is suggested for the reappearance of a surface runoff hudorgraph of a river basin by linking the hydrologic response of a catchment represented by the instantaneous unit hydrograph(IUH) with the Horton's empirical gemorphologic laws. The geomorphologic theory of the IUH developed by G. Itrube et al. and the geomorphoclimatic theory of the IUH developed by Bras et al. are used to derive the new hydrologic response function in consideration of geomorphologic parameters and climatic characteristics by applying to Sukekawa's rainfall-runoff model. The derived response function was tested for on some observed hydrographs in a natural watershed and showed promising, and by considering a drainage basin as m(1∼4) identical linear reservoir in series, it was founded that the model(m=2) is most applicable to predict hydrologic response regardless of the size of basins. A modelization algorithm of a basin using Sthahler's ordering scheme of drainage network will give good result in analysis of the surface runoff huydrograph by the method of this study.

• Proceedings of the Korea Water Resources Association Conference
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• 2019.05a
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• pp.355-355
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• 2019

본 연구에서는 물리적 매개변수 기반의 물 순환 해석 모형인 CAT(Catchment hydrologic cycle Assessment Tool)을 이용하여 보령댐 유역 상류에 위치한 삼산저수지의 저류량을 분석하였다. 연구기간은 2012~2017년이며 2015년 발생한 가뭄 대책의 일환으로 2016년 이후 금강과 보령댐을 잇는 도수로를 설치하여 유역내로 외부유입량이 유입되었다. 이에 본 연구에서는 보다 정확한 저류량 산정을 위해 모의 기간을 2012~2015년 및 2016~2017년으로 나누어 연구를 수행하였다. 매개변수 보정에 앞서 CAT에서 제공하는 세 가지 침투해석방법인 Rainfall Excess, Green&Ampt, Horton 방법을 모두 적용하여 모의하였으며 그 결과 Rainfall Excess 침투방법을 적용했을 때의 모의 정확도가 비교적 높게 나타나는 것을 확인할 수 있었다. 이에 본 연구에서는 Rainfall Excess 침투방법의 주요 토양 관련 매개변수인 토양수분율(${\theta}s$), 연직방향 투수계수(ks) 및 사면방향 투수계수(ksi)를 대상으로 전역최적화기법(SCEUA-P)을 이용한 보정을 수행하였으며 보정 전 후의 모의 저류량과 관측 저류량을 연도별로 비교 및 분석하였다.

• Journal of the Korean Geosynthetics Society
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• v.19 no.2
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• pp.13-21
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• 2020

In Korea, small reservoirs have been constructed for the supply of agricultural water, but most of them have been over 50 years from the year of construction. Aging agricultural reservoirs are being investigated for serious defects such as leaks and movements in slope, which are very vulnerable to safety. Accordingly, grouting methods are used to reinforce aging agricultural reservoirs in Korea. However, cement used as a grouting injection material consumes natural resources and generates a large amount of greenhouse gases during production. In addition, there is a problem that sufficient reinforcement is not made due to various factors such as the injection amount, the compounding ratio, the injection pressure, and etc. Therefore, due to these problems, the development of new materials and methods that can replace the grouting method and cement is required. In order to solve these problems, this study conducted an laboratory test on the surface stabilizer used to secure the stability of road and rail slopes. In addition, the program was analyzed and the reinforcing effect was examined when the surface stabilizer was used as reinforcement material for aging agricultural reservoir. As a result of the laboratory test, when the surface stabilizer is mixed, the increase of cohesion is possible up to 9% and there is no change in the friction angle. The results of the program analysis showed that the 1.0m reinforcement of slopes increased the factor of safety by 1.4 times, making it possible to reinforce the aging agricultural reservoir using surface stabilizers. And as a reinforcement method, it was analyzed that it is most appropriate to reinforce the slope and the bottom of slope simultaneously.