• The Journal of Society for e-Business Studies
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• v.20 no.1
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• pp.183-199
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• 2015

Due to the Four Major Rivers Restoration Project, Nakdong River Estuary Barrage's designed flood quantity has been largely increased, and this has caused to construct several drainage gates at the right side of Eulsukdo island to secure the safety of downstream river area. For successful functioning of Nakdong River Estuary Barrage, such as flood control, disaster prevention, and the securing of sufficient water capacity, drainage gates at the both sides of island have to operate systematically and reliably. To manage this under restricted personnel and resources, we have implemented the IOS (Integrated Operation System) by integrating previous facilities and resources via information and communication technologies. The IOS has been designed to have higher availability and fault tolerance to function continuously even with the partial system's failure under the emergency situation like flood. Operators can use the system easily and acknowledge alarms of facilities through its IWS (Integrated Warning System) earlier. Preparing for Integrated Water Resources Management and Smart Water Grid, the architecture of IOS conformed to open system standards which will be helpful to link with the other systems easily.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.11 no.1
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• pp.99-108
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• 1991

Rapid changes of urban hydrologic events need new management operation rule of detention reservoir which is essential outflow control system in urban area. Therefore, this study is to develop the outflow management method of Seoul city considering the Han river flood characteristics, to analyze the inundation of detention reservoir according to variation of design storm patterns, and to examine the safety of gate due to design flood water level. From this study, new operation rule is presented. The design storm patterns are determined by instantaneous intensity method and Huff's quartile method. And the inflow hydrograph of detention reservoir is obtained by applying ILLUDAS model and RRL method. The operation rule of existing drainage pump is designed to have linear relation between storage and pumping discharge. But in this study, it is effective for preventing inundation when the operation rule of drainage pump have Gaussian function which is combined the storage of detention reservoir with its inflow according to increasing or decreasing of inflow hydrograph.

• Journal of Wetlands Research
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• v.14 no.2
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• pp.289-301
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• 2012

Tidal artificial lake capable of inflow and outflow of seawater is planned for waterfront and eco-friendly space at Songdo, Incheon, Korea. This study for hydrodynamic behaviors of tidal artificial lake was carried out and predicted about water level and velocity within the lake corresponding to width of channel or waterway using by 1 dimensional numerical model(CEA) and 2 dimensional numerical model(FLOW2DH). As a result, the proper width, 100.0m of the channel between the lake and the open sea was calculated reasonable conclusions such as tidal phase lag and maximum velocity from CEA. Also, water level and velocity of each point within the lake was predicted and compared to the measured data from FLOW2DH. FLOW2DH was added to the gate control case for maintenance and administration purpose of the lake and obtained the results that the velocity was decreased by approximately 20% at flood and 50% at ebb than the case without gate control.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.42 no.6
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• pp.793-802
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• 2022

Non-structural improvements to urban drainage systems are necessary to overcome the elevated levels of urban flood damage. This study proposed a type of automatic pump/gate operation technology for urban pump stations that takes reservoir inflows and river water levels into account and its performance is compared with the current operation using the concept of residual flow-based resilience. The proposed automatic operation relies on three pump operations and two gate operations. The water depth at the monitoring node was used for the pump operation, and the monitoring node was selected in consideration of the first overflow node and the maximum overflow node. The target area is the Daegu Bisan urban pump station, and the rainfall data consisted of probability rainfall sets with durations of 30 minutes, 60 minutes, 90 minutes and 120 minutes, and frequencies of 30, 50, and 70 years. As a result of the application of the proposed operation, differences in the resilience between the automatic operation and the current operation were at least 5.20E-05 with a maximum of 8.07E-04. The longer the duration is, the greater the difference in the resilience.

• 한국방재학회:학술대회논문집
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• 2007.02a
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• pp.399-402
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• 2007

This project is the 1st. stage for the foreshore reclamation at Jang-Hang area and its scope is to construct a seawall as outer facilities, road adjacent to the seawall and drainage gate. for the safe protections of the facilities at the reclaimed land hereafter, we adopted the mild slope rubble mound type for the seawall structure which was excellent in interrupting the wave overtopping, as a result of numerical & hydraulic model test about alternative 4 sections. For the flooding prevention of the reclaimed land, we planned the drainage system that could make the flood water level lower than the reclaimed land level. Also, we planned the eco-friendly waterfront area with 8 nature themes through the whole seawall sections.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2003.10a
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• pp.539-542
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• 2003

In South Korea, flooding is controlled with large or small reservoirs scattered spatially over the territory. Because recent unexpected hard-rain events requires more flood control capacities, the pre-release system is considered with the most economical alternative. In this case time and volume of discharge should be determined by the simulation. But, existing pre-release simulation system has the problem of specificity. Therefore, GASS is considered to estimate the pre-release time and volume with different configurations of pre-release system. This paper shows that pre-release simulation system could be constructed with arranging GASAtmosphere, GASWatershed, Reservoir, Gate components using GASS. It is also shows that GASS could be used as a foundation for constructing pre-release simulation system that is easy to use and is flexible to reflect the changing configurations of reservoir systems.

• Proceedings of the Korea Water Resources Association Conference
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• 2004.05b
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• pp.303-307
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• 2004

본 연구의 목적은 수리 수문학적 모형인 HEC-GeoHMS, HEC-HMS 및 HEC-RAS 모형을 연계 응용 하여 성주댐 유역을 내상으로 수문분석, 홍수유출량분석, 하류 하천의 홍수영향분석 등을 실시하고 이를 이용하여 최적 수문조작 기법을 개발 하는데 있다. 홍수유출량과 하류부 홍수영향분석 결과 유출량은 실측값과 $0.07\~0.12$의 상대 오차를 나타냈고 하류부는 실측값과 $0.06\~0.07$의 오차로 적용성이 입증되었다. 최적 수문조작을 위해 모의 방법인 RigidROM과 성주댐 수문조작 방법을 비교해 본 결과 강우량 $350\~470mm$ 구간에서는 모의 방법이 $470mm\~550mm$ 구간에서는 성주댐 수문조작 방법이 효과적인 것으로 나타났다.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.736-740
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• 2007

본 연구에서는 Fusegate의 방류량 증대효과, Fusegate의 역학적 거동 확인 및 천변저류지의 활용성을 목적으로 수리실험과 수치실험을 병행하였으며 다음과 같은 결론을 얻을 수 있었다. 우선 Fusegate에 대한 이론적 연구를 바탕으로 Fusegate를 설계 및 제작하여 역학적 거동을 확인 및 이해 할 수 있었으며 방류량 증대효과도 확인하였다. 마지막으로 일반하천과 Fusegate가 설치된 천변저류지가 있는 하천의 극한 홍수 시 비교를 통해 천변저류지가 설치된 하천의 홍수방어능력이 증대됨을 알 수 있었다. 따라서 이번 연구를 통해 Fusegate 및 천변저류지의 활용 필요성을 입증할 수 있었으며, Fusegate의 개선방안을 제시할 수 있었다.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2005.10a
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• pp.193-198
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• 2005

The solar energy floodgate which discusses will minimize a quotient bringing up for discussion friction resistance and it will do to write a disturbance power, with the base which will reach it will be able to use the solar power unit in order. It is a plan which to magnification supply the practicality and will give proof will the effort with the irrigation facility of the farming village. Magnification supply of the solar energy floodgate which it sees hazard the stack supervisor and the possibility the use against the farmer and the easy frost does the monitoring against and the work which it complements is necessary.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2000.10a
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• pp.371-377
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• 2000

Environmental impact on a land reclamation project, Hwaong tidal barrier was studied using the dispersion and advection model to predict the influence of polluted water discharged from freshwater reservior. The simulation results show that the distribution of concentration by influence of polluted water discharged during a tidal cycle appeared to be extinguished at atmost all points after two tidal cycle. Peak concentration near the sluice gate is found out to be higher during the spring tide than neap tide. Equi-concentration contour line appeared to distributed a longer according to line of sea dike in spring tide than neap tide. The reasons is because influence by currents of northwest direction is a stronger, compared to spring tide and neap tide in the flood tide.