• Water for future
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• v.49 no.2
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• pp.47-56
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• 2016

• Water for future
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• v.44 no.8
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• pp.100-105
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• 2011

• Proceedings of the KGS Conference
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• 2005.05a
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• pp.199-201
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• 2005

• Proceedings of the Korea Water Resources Association Conference
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• 2003.05b
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• pp.651-654
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• 2003

• Journal of Korean Society of Water and Wastewater
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• v.12 no.2
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• pp.127-139
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• 1998

The objectives of this study is at the development of the channel routing model which can be used for flood prediction. Among the routing models, the hydraulic technique of the implicit scheme in the dynamic equation is selected to route the unsteady varied flow in the open channel. The channel routing model is catchment runoff which computed by the conceptual and transfer function model. The conceptual and transfer function model can simulate the catchment runoff accurately. As a result of investigating the channel routing model, the optimal weighting factor ${\theta}$ which fixes two points between time line is chosen, and also, the optimal error tolerance which satisfies computing time and converge of solution is determined in this study.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2001.10a
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• pp.324-329
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• 2001

Sediment yields from the reservoir watershed areas and raising of the spillway crest for the agricultural reservoir capacity enlargement were investigated and analysed through the 21 pilot reservoirs, have irrigated areas 200has. and over in the Kyoungpook province. In these studies, (1), the correlation analysis between various watershed characteristics and annual specific sediment yields were derived and (2), the excess effective reservoir capacity of the over 0.5m above the spillway crest could be estimated. In brief, catchment area should strongly be correlated with the annual specific sediment yields (R=0.90), the other side, average slope of the main stream is less than catchment area. The excess effective capacity of reservoir enlargement by the raising of spillway crest at 0.5m-height was resulted 12.1% of increasing capacity compare with the original reservoir capacity.

• 한국태양에너지학회:학술대회논문집
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• 2008.11a
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• pp.322-326
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• 2008

This paper presents an estimation method of small hydro power(SHP) potential using a SHP resource map. As a basic unit of SHP energy potential at a certain area, capacity and annual energy production of unit head was calculated from the catchment area given by a SHP resource map which was established by numerical hydrologic simulation so that a logical and relatively accurate potential estimation was possible comparing with the performance analysis model for SHP sites. The performance characteristics for Samok-Ri site were analyzed, using the SHP resource map and the developed model. It was found that the SHP resource map and the developed model is useful tool to estimate SHP potential.

• Journal of Environmental Science International
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• v.5 no.2
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• pp.103-112
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• 1996

Observational date is integral in our understanding of present climate, its natural variability and any cnange roue to anturopogenic effects. This study incorporates a brief overview of sampling requirements using data from the first ISLSCP Field Experiment (FIFE) in 1987, which was a multi-disciplinary field experiment over a 15km grid in Konza Prairie, USA. Sampling strategies were designed for precipitation and soil moisture measurements and also detecting land cover type. It was concludes that up to 8 raingages would be needed for valuable precipitation measurements covering the whole FIFE catchment, but only one soil moisture station. Results show that as new gages or station are added to the catchment then the sampling error is reduced, but the Improvement in error performance is less as the number of gages or stations increases. Sampling from remoteiy sensed instruments shows different results. It can be seen that the sampling error at 1arger resolution sizes are small due to competing error contribution from both commission and omission error.

• Water for future
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• v.37 no.2
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• pp.98-103
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• 2004

유역 통합수자원관리를 지원하는 모델링 Toolkit을 소개하는 Catchment Modelling School04가 2004년 2월 9∼20일 호주 멜버른대학교에서 개최되었다. 이 workshop을 주관한 CRC(Cooperative Research Centre)는 한국의 21세기 프론티어 연구사업단(수자원의 지속적 확보기술개발 사업단)과 유사한 기능을 가진 기구로서 1991년도에 설립된 이래 공익을 위한 기술혁신과 상용화에 중점을 둔 범국가적 수자원 기술개발을 주도하여 왔다. 이 CRC는 호주 기상국, 무레이 다링 유역위원회 등의 연방정부기관과 빅토리아, 뉴우 사우스 웨일스, 퀸스랜드 등의 주정부, CSIRO Land and Water, 멜보른 대학, 모나쉬대학, 그리휘스 대학 등의 연구집단과 연계해서 초창기의 1단계 7개년 연구사업 기간('92∼'99) 동안 주로 소규모 수자원 환경 계측기술개발과 모형개발을 해 왔으며, 2단계 6개년('99∼2006)의 중반인 현재 유역단위의 대규모 모델링에 중점을 두어 8개 분야의 21개 연구과제를 수행하고 있다.(중략)

• Magazine of the Korean Society of Agricultural Engineers
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• v.45 no.4
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• pp.89-97
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• 2003

Using inference models developed for estimation of the parameters necessary to implement the Runoff Block of the Stormwater Management Model (SWMM), a number of alternative inference scenarios were developed to assess the influence of inference model complexity and structure on the calibration of the catchment modelling system. These inference models varied from the assumption of a spatially invariant value (catchment average) to spatially variable with each subcatchment having its own unique values. Fur-thermore, the influence of different measures of deviation between the recorded information and simulation predictions were considered. The results of these investigations indicate that the model performance is more influenced by model structure than complexity, and control parameter values are very much dependent on objective function selected as this factor was the most influential for both the initial estimates and the final results.