• 한국환경교육학회지:환경교육
• /
• 제3권1호
• /
• pp.125-129
• /
• 1992

The purpose of this study was to investigate the condition of school water supply systems and to provide a way to supply safe and sanitary water in schools. In 1991 present, 56.9% of schools in the whole nation are provided with water supply system. And in urban schools, the percentage of small water supply system was larger than that in city. In the survey on water quality of supply water in Seoul city, the items violating the water quality standard were total bacteria, Zinc and Manganse. For supply the safe drinking water changing the old water mains and executing periodical water quality surveys are needed in addition regulations on school supply water and sanitation are also necessary to the drinking water management in schools.

• 한국농공학회논문집
• /
• 제54권3호
• /
• pp.125-132
• /
• 2012

Saemangeum development project is the world's largest tidal flat reclamation project. It is currently under construction, and proceeding with phased developments. The construction of agricultural areas within the Saemangeum reclamed lands is also a part of this project. These areas will have multi-functional complexes aiming to produce mainly eco-friendly horticultural crops and livestock products for the purpose of export. The major concern is to obtain sufficient water with appropriate quality to supply to those areas. The objective of this study is therefore to provide available water supply plans for agricultural purpose, especially for horticulture and livestock complexes. Alternative methods for water supply are purifying water from the Saemangenm lake or using water supply services providing by K-water or local governments. This study investigates to find an economical water supply plan through comparisons of these methods. As a result, the water purification method with Saemangeum lake water could be advantageous for given water supply conditions to horticulture and livestock complexes.

• 설비공학논문집
• /
• 제18권10호
• /
• pp.768-775
• /
• 2006

The water supply system has been designing by decision process such as calculation of water supply amount, capacity of water tanks and pumps, pipe size. Especially, when we estimate excessively water supply amount, the initial cost and running cost will increase according to enlargement of the water tank and pump capacity, and water quality of ground water tank can become worse. Therefore, calculation of water supply amount is basically most important factor. In order to calculate exactly water supply amount applying domestic real situation, we should set up basic data as well as study calculation methods. This research would consider calculation methods of water supply amount for school building through examine domestic and foreign basic data of water supply amount and characteristics of domestic school, and estimate daily water supply in high school.

• 한국수자원학회논문집
• /
• 제54권6호
• /
• pp.443-452
• /
• 2021

혼합정수 계획의 최적화 기법으로 유도한 '용수 감량 공급 기준'은 용수를 미리 감량 공급함으로써 가뭄 기간에 상대적으로 많은 물을 확보하여 저수지를 운영하는 기준이다. 우리나라의 다목적 저수지 운영에 적용하고 있는 현행 기준은 모의 운영 기법으로 유도된 '용수공급 조정기준'이다. 2003-2018년 기간의 저수지 유입량을 입력 자료로 하여, 합천 다목적댐 저수지의 모의 운영에 두 방법을 적용한 결과, 두 방법 모두 2015년부터 2018년까지 지속된 가뭄에 장기간 물 공급 부족이 발생하였다. 특히 2017년 하반기에 물을 전혀 공급하지 못하거나 간헐적으로 공급하는 기간이 지속해서 나타났다. 용수공급 조정기준은 '정상 용수공급 환원 기준 저수량'을 둠으로써, 2017년 7월에 용수공급 불가 상태에 이른 다음, 저수량이 정상 용수공급 환원 기준 저수량 보다 커지는 2018년 1월까지 용수공급을 중단하는 결과를 낳았다. 저수지에 물이 유입되어 저수량이 증가하는 상태에도 불구하고 물 공급을 중단하는 결과는 실행 상 개선이 필요하다. 현행 용수공급 조정기준과 용수 감량 공급 기준 모두 가뭄 단계별 용수의 감축 공급 개념을 과학적 수치로 나타낸 저수지 운영 기준으로서 유용하고 현실적이다. 그렇지만 위와 같이 몇 개월간 물을 전혀 공급하지 못하거나 간헐적으로 공급하는 저수지 모의 운영 결과를 개선하기 위하여, 현재 적용 중인 가뭄 단계별 물의 공급 축소량을 증가시킬 필요가 있다.

• 한국농공학회논문집
• /
• 제54권2호
• /
• pp.37-46
• /
• 2012

The change of rainfall pattern and hydrologic factors due to climate change increases the occurrence probability of agricultural reservoir water shortage. Water supply assessment of reservoir is usually performed current reservoir level compared to historical water levels or the simulation of reservoir operation based on the water budget analysis. Since each reservoir has the native property for watershed, irrigation district and irrigation water requirement, it is necessary to improve the assessment methods of agricultural reservoir water capability about water resources system. This study proposed a practical methods that water supply vulnerability assessment for an agricultural reservoir based on a concept of probabilistic reliability. The vulnerability assessment of water supply is calculated from probability distribution of water demand condition and water supply condition that influences on water resources management and reservoir operations. The water supply vulnerability indices are estimated to evaluate the performance of water supply on agricultural reservoir system, and thus it is recommended a more objective method to evaluate water supply reliability.

• 한국지열·수열에너지학회논문집
• /
• 제15권4호
• /
• pp.32-38
• /
• 2019

In this study, the effect of hot water supply flow rates on energy consumption for radiant floor heating system in apartment were researched by computer simulation. The parametric study of different hot water supply flow rates was done with regard to energy performance and control characteristics, respectively. Also the effect of different hot water supply flow rates on the hot water supply temperatures is studied. As a result, energy consumption were reduced but the response time is increased by reducing the supply flow rate. And energy consumption can be saved by adjusting the hot water supply temperatures with different supply flow rates.

• 한국환경과학회지
• /
• 제13권3호
• /
• pp.197-204
• /
• 2004

In this study analyzed the reliability indices against the water supply ability of Andong dam. The water supply analysis of Andong dam used the HEC-5 model. So Andong dam simulated planed water-supply capacity of Andong dam as increase and decrease +5% ～ -5% of water supply quantity. Water-supply capacity of Andong dam estimated, deficit occurrence, deficit quantity, deficit period. As the results estimated reliability(occurrence based, time based, quantity based) and resiliency vulnerability and with water supply capacity evaluation indices of Andong dam. Also reliability(occurrence based, time based, quantity based), resiliency, vulnerability and resiliency indices are estimated to evaluated the performance of water supply on Andong dam, and their relationships are evaluated.

• 한국농공학회논문집
• /
• 제54권6호
• /
• pp.39-44
• /
• 2012

Water supply capacity and operational capability in agricultural reservoirs are expressed differently in the limited storage due to seasonal and local variation of precipitation. Since agricultural water supply and demand basically assumes the uncertainty of hydrological phenomena, it is necessary to improve probabilistic approach for potential risk assessment of water supply capacity in reservoir for enhanced operational storage management. Here, it was introduced the irrigation vulnerability characteristic curves to represent the water supply capacity corresponding to probability distribution of the water demand from the paddy field and water supply in agricultural reservoir. Irrigation vulnerability probability was formulated using reliability analysis method based on water supply and demand probability distribution. The lower duration of irrigation vulnerability probability defined as the time period requiring intensive water management, and it will be considered to assessment tools as a risk mitigated water supply planning in decision making with a limited reservoir storage.

• 한국환경과학회지
• /
• 제11권12호
• /
• pp.1227-1233
• /
• 2002

In general, the evaluation of water supply capacity is important factor to establish various establishment of water resource supply plan include water resource security and determination of dam's mass. But former researchs about estimation of water supply capacity were lack in continunity of evaluation basis, and didn't excute analysis on reliability criteria also. In this study, Nakdong river was selected for study basin, and then water supply capacity was analyzed by HEC-5 model using identical reliability criteria.

• 한국농공학회논문집
• /
• 제54권5호
• /
• pp.123-128
• /
• 2012

For optimal reservoir operation and management, there are essential elements including water supply in agricultural reservoir and demand in irrigation district. To estimate agricultural water demand and supply, many factors such as weather, crops, soil, growing conditions cultivation method and the watershed/irrigation area should be considered, however, there are occurred water supply impossible duration under the influence of the variability and uncertainty of meteorological and hydrological phenomenon. Focusing on agricultural reservoir, amount and tendency of agricultural water supply and demand shows seasonally/regionally different patterns. Through the analysis of deviation and changes in the timing of the two elements, duration in excess of water supply can be identified quantitatively. Here, we introduce an approach to assessment of irrigation vulnerable duration for effective management of agricultural reservoir using time dependent change analysis of residual water supply and irrigation water requirements. Irrigation vulnerable duration has been determined through the comparison of water supply in agricultural reservoir and demand in irrigation district based on the water budget analysis, therefore can be used as an improved and basis data for the effective and intensive water management.