• 한국농공학회논문집
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• 제48권1호
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• pp.91-102
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• 2006

Most projects of tideland reclamation with dike construction produce estuarine reservoirs, which may result in water quality problems due to blocking of natural flow of stream water to the sea. External loadings to the reservoirs through tributaries are major concerns in a concerned water quality management. The water quality of a reservoir is greatly influenced by watershed drainage, and accurate estimation of pollutant is indispensable for in the reservoir management. Concentrations of the microorganisms in stream water and conventional parameters were monitored in the 13 water quality monitoring sites located in a rural watershed of Hwaong estuarine reservoir. The indicator of microorganisms showed strong correlation between them, and regression equations with $R^2\geq0.70$ may be used fur estimating one from other microorganisms. The relationships between water quality parameters obtained in this study may be used to infer one unknown pollutant concentrations from the measured pollutant loadings. This methodology could be applied to other areas where the watershed characteristics are not significantly different from the study area. High concentrations of nitrogen was observed in water quality monitoring sites affected by urban land uses and numbers of livestock in wet day as well as dry day, due to the influent of diffuse sources.

• 한국물환경학회지
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• 제29권4호
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• pp.466-475
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• 2013

Non-point source pollution management is one of the most important issues in Korean water quality/watershed management. In recent years, Low Impact Development (LID) has emerged as an effective approach to control stormwater in an urban area. This study illustrates how to design and evaluate the effect of non-point pollutant management using EPA-SWMM LID module and suggests design parameters for modeling LID facilities. In addition, optimal installation locations of LID can be determined by a simple distributed hydrologic model by using SWMM for a long-term.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2003년도 학술발표논문집
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• pp.235-238
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• 2003

In this study, we developed Open Water Management Program (OWMP) with an open architecture to deal with newly arising upgrade problems for a water management automation system. When we executed OWMP with data produced from an experimental field in Korea, the relative errors of this simulation were less than 5%. We developed runoff calculation model and verified it with measured data of 4 basins included in IHP. The relative errors came out less than 5% in all basins, except for one basin. We also applied OWMP to seongju irrigation reservoir to simulate daily runoff from 1998 to 2002, and the day, month, and year relative error between measured and simulated value was 0.25-0.05. Therefore the OWMP can be a tool nicely adapted to the optimal water management of irrigation reservoir.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2022년도 학술발표회
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• pp.8-12
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• 2022

Water loss is one of the typical but challenging problems in water management. To reduced water loss or increase water efficiency, the pilot projects were implemented in the TTD's irrigation area. Modern soil moisture technology and local level water user training were conducted together as a mean to achieve improved water efficiency. In terms of technology, soil moisture sensors and monitoring system were used to estimate crop water requirement to reduce unnecessary irrigation. This was found to save 16.47% of irrigated water and 25.20% of irrigation supply. Further improvement of water efficiency was gained by means of local level water user training in which stakeholders were engaged in the network of communications and co-planning. The lessons learnt from the TTD pilot project was translated into good water management practices at local level.

• 수산경영론집
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• 제32권2호
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• pp.127-148
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• 2001

Korean distant water trawl fisheries were sector of most important distant water fisheries with tuna long liner fisheries during the development age in Korea. Nevertheless Korean distant water trawl fisheries have suffered from catches and Income problem. It was caused to the strengthen regulation of costal countries, the rapid liberalization trend of trade on the fishing products and the shortage of cheap manpower, etc. In this situation, Korean government is inclined to convert big adjacent trawl fisheries of distant water trawl fisheries for structure adjustment In domestic fisheries. that is analyzed to incorrect method because the efficiency of management indicator in adjacent trawl fisheries was bad than distant water trawl fisheries. Then this policy of Korean government needs to convert anything else. Also it was compared with one of Japan to the efficiency of management indicator of Korean distant trawl fisheries. The result of analysis, Korea was better than Japan in some factor, especially labor cost Then if Korean government will put weighted policy on this viewpoint, Korean distant water trawl can more grow.

• 한국콘텐츠학회논문지
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• 제13권10호
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• pp.266-277
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• 2013

최근 기후변화와 도시화의 진전으로 물에 대한 수요가 확대되고 있는 반면, 깨끗하고 안전한 물의 공급은 한정됨에 따라, 효율적인 물 관리의 중요성이 강조되고 있다. 그러나 우리나라의 물 관리 행정체계는 다부처가 관여하는 전형으로 효율성이 매우 떨어지고 있는 것으로 평가되고 있다. 즉 물과 관련된 업무가 국토부, 환경부, 농림부, 안전행정부, 산업부 등으로 분산되어 있다. 이에 따라 물 관리와 관련된 주요 업무의 조정과 통합이 어렵고, 효율성이 떨어지는 문제가 지속되고 있다. 본 연구는 우리나라 물 관리 행정체계에 관한 선행연구를 검토하여 핵심쟁점을 도출하고, 현행 물 관리 체계의 현황과 문제점을 분석한 후, 이에 대한 전문가 인식을 설문조사를 통해 조사하였다. 조사결과, 우리나라의 물 관련 전문가들은 물 관리 행정체계의 가장 큰 문제를 '부처간 물 관리 정책조정의 실패(55.8%)'로 인식하고 있고, 대안으로 새로운 통합 조정 조직인 '(가칭)물 관리위원회의 신설'(77.0%)을 지지하고 있는 것으로 나타났다. 또한 새로운 조직의 신설 없이, 하부조직, 수도, 통계 등 세부적인 물 관련 업무를 통합하는 방안에 대해서는 환경부로의 통합을 지지하는 의견이 상대적으로 높은 것으로 나타났다. 이러한 전문가 인식조사에 기초할 때, 우리나라의 물관리 행정체계는 통합 조정을 강화하는 방향으로 개편될 필요가 있으며, 개발보다는 보전의 관점에서 수량보다는 수질을 중심으로, 새로운 조직의 신설 또는 환경부로의 통합을 통 해 효율성을 강화하는 방향으로 개편될 필요가 있다.

• 한국수소및신에너지학회논문집
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• 제25권4호
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• pp.386-392
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• 2014

The effective water management in a polymer electrolyte membrane fuel cell (PEMFC) is one of the key strategies for improving cell performance and durability. In this work, an ex situ measurement was carried out to understand the water droplet behavior on the surface of gas diffusion layer (GDL) as a fundamental study for establishing novel water management. For that purpose, simplified cell including one rib and two flow channels was designed and fabricated. Using this ex situ device, the water droplet emergence through the GDL of the PEMFC was emulated to understand liquid water transport through the porous diffusion medium. Through the visualization experiment, the emergence and growth of water droplets at the channel/GDL interface are mainly observed with the surface characteristics of GDL (SGL 10BA, 24BA) and rib when the liquid water passes through the GDL and is expelled to the flow channel. It is expected that the results obtained from this study can contribute to the better understanding on the water droplet behavior (emergence and removal) in the flow channels of PEMFC.

• 상하수도학회지
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• 제33권4호
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• pp.259-268
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• 2019

One of the most effective methods to consistently ensure the safety of a tap water supply can be achieved by application of a comprehensive risk assessment and risk management approach for drinking water supply systems. This approach can be termed water safety plans(WSP) which recommended by WHO(world health organization) and IWA(international water association). For the introduction of WSP into Korea, 150 hazards were identified all steps in drinking water supply from catchment to consumer and risk assessment tool based on frequency and consequence of hazards were developed. Then, developed risk assessment tool by this research was implemented at a water treatment plant($Q=25,000m^3/d$) to verify its applicability, and several amendments were recommended; classification of water source should be changed from groundwater to stream to strengthen water quality monitoring contaminants and frequencies; installation of aquarium to monitor intrusion of toxic substances into raw water; relocation or new installation on-line water quality analyzers for efficient water quality monitoring; change of chlorination chemical from solid phase($Ca(OCl)_2$) to liquid phase(NaOCl) to improve soundness of chlorination. It was also meaningful to propose hazards and risk assessment tool appropriate for Korea drinking water supply systems through this research which has been inconsistent among water treatment authorities.

• 한국태양에너지학회 논문집
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• 제32권5호
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• pp.118-123
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• 2012

Water balance has a significant impact on the overall fuel cell performance. Maintenance of proper water management should provide an adequate membrane hydration and avoidance of water flooding in the catalyst layer and gas diffusion layer. Considering the important of advanced water management in PEM fuel cell, this study proposes a simple one dimensional water transportation model of PEM fuel cell for use in a dynamic condition. The model has been created by assumption that the output is the water liquid saturation difference. The liquid saturation change is the total difference between the additional water and the removal water on the system. The water addition is obtained from fuel cell reaction and the electro osmotic drag. The water removal is obtained from capillary transport and evaporation process. The result shows that the capillary water transport of low temperature fuel cell is high because the evaporation rate is low.

• 한국수자원학회논문집
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• 제57권1호
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• pp.59-72
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• 2024

농업용저수지는 관개용수, 유지용수, 생활용수 등 다양한 목적을 가지고 용수공급을 수행한다. 농업용저수지는 계절과 기후 변화에 민감하게 반응하기 때문에 효율적으로 운용하기 위해선 공급량 및 유입량 계측은 필수적이며, 이러한 자료를 바탕으로 용수관리가 합리적으로 이루어져야 한다. 하지만 농업용저수지의 경우 다목적 댐에 비해 공급량 및 유입량에 대한 계측이 상대적으로 미비한 실정이며, 효율적이고 합리적인 용수 관리를 위해선 물수지 분석을 통한 농업용 저수지에서의 유입량-공급량 분석이 필요하다. 이에 ONE model, Tank model과 같은 강우유출해석모형이 개발되어 저수지 물수지 해석에 활용되고있으나, 미계측 유역에 대한 적용성 분석은 미비한 실정이다. ONE model은 기본적으로 일단위 유출계산을 위해서 설계되었으며, 해당 모형은 하나의 매개변수를 가지고 있어 Tank model의 한계로 지적되는 보정 및 미계측 유역 분석에 유리하다. 이에 15개의 댐상류 유역을 대상으로 ONE model과 Tank model을 통해 물수지를 분석하고, 두 모형의 성능을 정량적으로 비교분석하고자 R²와 NSE을 활용하였다. 모의결과에 따르면, ONE model의 R²와 NSE가 Tank model 보다 높게 나타났으며, 이는 ONE model이 미계측유역에 대한 유입량 예측에 더 적합할 것으로 평가된다.