• Magazine of the Korean Society of Agricultural Engineers
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• v.37 no.2
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• pp.13.2-20
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• 1995

An water balance model was formulated to simulate the change in water levels at the estuary reservoir from sluice gate releases and the inflow hydrographs, and an one-di- mensional flood routing model was formulated to simulate temporal and spatial varia- tions of flood hydrographs along the estuarine river. Flow rates through sluice gates were calibrated with data from the estuary dam, and the results were used for a water balance model, which did a good job in predicting the water level fluctuations. The flood routing model which used the results from two hydrologic models and the water balance model simulated hydrographs that were in close agreement with the observed data. The flood forecasting model was found to be applicable to real-time forecasting of water level fluc- tuations with reasonable accuracies.

• Journal of the Korean GEO-environmental Society
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• v.14 no.11
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• pp.55-63
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• 2013

Agricultural small dam reservoirs in Korea are vulnerable to flooding because of insufficient flood control capacity and deterioration such that reservoir water level is likely to rise rapidly and a large amount of water release quickly to downstream without flood warning. In this study, we performed hydrologic analysis to estimate design flood(200 years return period ${\times}1.2$) and also evaluated the effect of siphon spillway as a structural countermeasure for flood control and mitigation by applying reservoir routing to the Jipyeong reservoir, located in Sangju, Korea. The results show that the design flood was calculated at $284.3m^3/s$, and water level and water release decreased by 40cm and $91m^3/s$, respectively.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.9 no.1
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• pp.63-70
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• 1989

The numerical model for the flood routing at the downstream of the Han river is established by using Preissmann's four-point linear implicit finite difference scheme. It is approved by the applications of this model to the selected four flood events that the released discharge hydrograph at Paldang dam which is used as upstream boundary condition of this model is better than the discharge hydrograph at Goan site. Such a result is due to the poor reliability of rating curve at Goan site. As its alternative, new rating curve at Goan site is proposed by means of applications of this numerical flood routing model. The variations of Manning's roughness coefficient may be negligible in view of the flood routing results.

• Water for future
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• v.26 no.1
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• pp.93-101
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• 1993

Because of the Keumkangsan-Dam and the Peace-Dam constructed in recent years, it is expected that the peak flood discharge and the peak flood stage at the Hwachun-Dam site have been changed. In this study, two methods were used to simulate and compare the effects of the upstream dam construction on the change of the discharge and the stage. One is the storage function method widely used for the hydrological routing in this country. The other is the DWOPER (Dynamic Wave Operational Model) package developed by the U.S. NWS for the hydraulic routing. Flood routing simulations have been performed on four different scenarios:1) Before the construction of the Keumkangsan-Dam and the peace-Dam, 2) The exclusion of the Keumkangsan-Dam watershed (before the construction of the Peace-Dam), 3) The exclusion of the Keumkangsan-Dam watershed (after the construction of the Peace-Dam), 4) The exclusion of the Peace-Dam watershed. The results of the four test cases from the two methods show that the peak flood discharge and the peak flood stage at the Hwachun-Dam site are reduced due to the construction of the Peace-Dam. From these findings, it is suggested that the operational criteria for the optimal dam-operation of the hwachun-Dam need to be modified.

• Journal of Korea Water Resources Association
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• v.30 no.2
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• pp.131-141
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• 1997

In this study, the Storage Function Method and Loopnet Model (Unsteady flow analysis model) were used to construct the flood prediction system which can predict the effects of the water release in the downstream region of Teachong Dam. The regional frequency analysis (L-moment) was applied to compute frequency-based precipitation, and the flood prediction system was also used for flood routing of the down stream region of Teachong Dam in the Kum River Basin to calculate frequency based flood. The magnitude of flood, water level, discharge, and travel time to the major points of the downstream region of Teachong Dam, which can be used as an imdex of flood control management of Teachong Dam, were calculated.

• Water for future
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• v.18 no.3
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• pp.265-270
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• 1985

The prediction of a design-flood hydrograph at a particular site on a river may be based on the derivation of discharge or stage hydrograph at an upstream section, togeater with a method to route this hydrograph along the rest of river. On the other hand, flood routing methods provide a useful tool for the analysis of flooding in all but the smaller catchment, and these methods are largely stored into hydrological method and hydraulic method. Although the Muskingum Method as a hydrological method ignores dynamic effects on the flood wave, Muskingum-Cunge Method based on hydraulic method is possible to improve the method so that it gives a good approximation to the solution of the linear convective-diffusion equation. This is made on the basis of the finite diffeience equation for the Muskingum Method. In the study, the outflows predicted by Muskingum-Cunge Method are campared with the observed outflows of the Pyung Chang River.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.09a
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• pp.785-786
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• 2005

• Proceedings of the KAIS Fall Conference
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• 2009.05a
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• pp.520-524
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• 2009

본 논문에서는 격자형태의 무선 Ad-hoc 통신망에서 사용하는 포화경로 선정 알고리즘의 성능을 분석하였다. 대체경로 라우팅을 함으로써 좀 더 낮은 차단확률을 기대할 수 있어, 포화경로 선정 알고리즘을 사용의 타당성을 확인할 수 있었다. 또한 기존의 Flood search 알고리즘, Restricted flooding, Hybrid routing의 성능을 모의시험을 통하여 분석한 결과 통신망 효율면에서 Flood search 알고리즘이 우수한 것으로 나타났다.

• Water for future
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• v.22 no.1
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• pp.99-107
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• 1989

KEUM River downstream has some characteristics in which the dowunstream is affected with tidal motion, the several tributaries are forming a dendritic river system, and the channel cross-sections are irregular. The flood in this downstream can now be analyzed by the hydrological flood routing methods and under the assumption regarding the dendritic river system as a single reach. In this study the river system was used for the flood routing. The flood records which were measured in 1978 and 1987 were applied for calibration and verification of the unsteady flow model respectively. The results show that the flood at KANG-KYONG station was not affected with the tidal motion when the discharge at KONG-JU station exceeded about 5, 000$m^3$/sec, and that the bottle neck at IP-PO station intercepted the tidal influences.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06a
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• pp.129-130
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• 2007

본 논문에서는 격자형 Ad-hoc 전술통신망에서 Alternating Routing Algorithm 의 적합성 연구를 수행하였다. 이 통신망의 신호 방식은 공통선 신호 방식을 사용하며, 경로선정 방식은 Flood search Routing을 사용한다. 분석 결과 alternate routing을 함으로써 좀 더 낮은 차단확률(Stocking Probability)을 기대할 수 있는 것으로 판단되었다.