• 상하수도학회지
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• 제20권4호
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• pp.527-534
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• 2006

Demand side management(DSM) is the newly raised issues in the water resources management in recent. Many of the policy tools among demand management, the most important measures might be a pricing system. Furthermore, the responses of consumers on the price for water consumption level is the key factor for policy making. Here, we estimated panel data for 167 regions and over 7 years periods in Korea. Compare to other previous studies the price elasticities were somewhat low. The estimated price elasticity was -0.05. It was because the short term estimated period may derive lower elasticities. However, it might be a recent trend after the continuous increment of water pricing and consumers not willing to decrease their residential water consumption with increasing water pricing. According to this results, water saving effect might be much smaller than we expect with pricing policy. However, It does not imply there is no price effects on water consumption and it's still meaningful as a tool of water management.

• 자원ㆍ환경경제연구
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• 제27권1호
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• pp.195-214
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• 2018

우리나라에서도 최근 잦아진 가뭄으로 물 부족에 대한 경각심이 높아졌다. 특히, 2015년의 가뭄은 경제적으로 큰 피해를 야기하였고 적극적인 물 수요 관리의 필요성을 부각시킨 계기가 되었다. 경제학적 측면에서 수요관리 정책을 설계하기 위해 선행되어야 될 점 중 하나는 신뢰성 있는 가격탄력성의 추정이다. 그러므로 본 연구에서는 기존 국내 선행연구들에 비해 강건한 생활용수 수요의 가격탄력성을 추정하고자 한다. 이를 위해 2010년도에서 2013년도까지 지방 상수도 공급지역 161개의 자료를 패널 분위수회귀모형을 사용해 추정하였고 이를 패널자료 회귀모형의 결과와 비교 분석하였다. 분석 결과, 생활용수 수요의 가격탄력성은 -0.156에서 -0.189 사이의 값을 갖는 것으로 추정되었다. 또한 본 연구에서는 조건부 평균 회귀를 사용하는 경우 왼쪽꼬리가 길고 오른쪽 분포가 두꺼운 우리나라 생활용수 수요량 분포의 특징으로 수요량이 많은 지역들의 성향이 추정결과에 상대적으로 크게 반영된다는 점을 확인하였다.

• 한국수자원학회논문집
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• 제43권11호
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• pp.957-965
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• 2010

국민들의 삶의 질과 직접적으로 연관되어 있는 생활용수의 수요 관리 및 공급을 위한 적절한 투자 등 합리적인 정책을 수립, 시행하기 위해서는 생활용수의 경제적 가치에 관한 정확하고 객관적인 정보가 필요하다. 본 연구에서는 수요함수 접근법을 이용하여 16개 시도의 생활용수의 소비자 잉여 및 경제적 가치를 추정하였다. 분석결과, 2009년 전국의 생활용수의 $m^3$당 소비자 잉여와 경제적 가치는 각각 1,180.7원과 1,812.8원으로 추정되었으며 시도별 1,082.7원에서 3,268.6원의 범위를 갖는 것으로 나타났다. 또한 지역에 상관없이 비가정용수의 경제적 가치가 가정용수의 경제적 가치를 초과하였고, 수돗물의 가격에 비해 생활용수의 경제적 가치는 매우 높은 것으로 나타났다. 본 연구결과는 생활용수 공급의 경제적 편익에 대한 정보로 활용될 수 있으며 더 나아가 수도요금 산정의 배경자료로도 참고할 수 있을 것이다.

• 한국수자원학회논문집
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• 제39권7호
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• pp.563-574
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• 2006

경제이론에 의하면 소비자들은 언제나 효용을 극대화하기 위한 선택에 직면한다. 이 같은 소비자의 선택은 생활용수의 가격, 공급 및 수요 등에 정보가 시장을 통해 나타나고 정책결정자들은 이를 정책 지표로 이용하게 된다. 그러나 수자원의 경우는 시장이 형성되어 있지 않기 때문에 시장에서의 그 같은 정보 획득이 제한적이다. 본 연구는 생활용수의 수질개선에 따른 소비자 지불의사를 1,000 가구를 대상으로 조사하고 이를 추정하였다. 또한 생활용수에 대한 소비행태에 대한 분석도 시도되었다. 소비자들은 현재의 물 값에서 50%의 인상에 대해서는 강한 절수 의지를 보인 반면 25% 이하의 물 값 인상에 대해서는 거의 절수 의지가 없는 것으로 나타나 현행 물 값이 절수를 유도하는 데는 낮은 수준임을 나타내고 있다. 수돗물의 수질이 향상된다는 조건으로 소비자는 매월 현행 물 값의 16%, $1m^3$당 약 153원을 지불할 수 있음을 보였다. 이 같은 정보를 토대로 생활용수에 대한 정책 제언을 하였다.

• Water Engineering Research
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• 제3권4호
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• pp.269-278
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• 2002

A cross sectional analysis for residential water demand was conducted to help understand and explain the spatial and temporal variations in per capita water use in the rapidly growing city of Riyadh, Saudi Arabia. The analysis was based on data previously collected from May 1983 to June 1984. 195 randomly selected households were distributed to three groups according to house condition, household income level, and social and cultural factors. The generated models using stepwise multiple regression indicated that plot size and number of males, females and children are the most significant independent variables. Although, coefficients of determination achieved for most of the developed models were low (0.2-0.5), the independent variables could still explain a part of the variations fur such a complex social and cultural structure.

• 산경연구논집
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• 제11권10호
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• pp.39-48
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• 2020

Purpose: Management of water is a crucial issue globally and is becoming more critical due to climate change. The purpose of this study is to explore water resource management by considering price and water usage based on river basins and to suggest more efficient residential water demand management in South Korea. Research Design, data, and methodology: This study applied data of water usage and water price of 15 regions in four major river basins by considering up and downstream locations from 1997 to 2017 collected by Ministry of Environment in Korea. This study applied regression analyses, ANOVA, and 2-Way ANOVA to verify its claims. Results: The results found that effects of price on water usage showed significant in many cities. The results also showed that means of water usages differ based on location (upstream and downstream) and river basins. Conclusion: The findings provide important policy and management implications for the improvement of water resource management in terms of demand. The results also indicate that water price should be reconsidered by comparing water price levels with those of OECD countries. Furthermore, the results imply that water management in Korea needs to improve in terms of supply to cope with climate change.

• 한국환경과학회지
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• 제21권9호
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• pp.1115-1129
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• 2012

The objective of this study was to analyze long-term annual and seasonal trends of water chemistry on landuse patterns and seasonal precipitation using 72 sampling sites within Namhan River watershed during 2001-2010. Water quality, based on multi-parameters of water temperature(WT), dissolved oxygen(DO), biochemical oxygen demand(BOD), chemical oxygen demand(COD), suspended solids(SS), total nitrogen(TN), total phosphorus(TP), and electric conductivity(EC) varied largely depending on monsoon rain and landuse patterns such as forest, cropland, and residence. Concentrations of BOD and COD as an indicator for organic matter pollution, increased during summer monsoon season at the cropland and residential streams. Values of TN and TP were higher in residential streams than in the forest and cropland streams. In the meantime, DO values had weak relations to the landuse patterns of forest and cropland cover. Water quality was worst in cropland and residential streams, and also most degradated in 4th order streams. Overall, our results suggest that efficient water quality management is required in the cropland and residential landuse streams.

• 한국환경과학회지
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• 제25권3호
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• pp.447-456
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• 2016

Access to clean and affordable water is one of the fundamental human rights because water is essential to life and a foundation for socioeconomic development of any country in the world. Despite the efforts to secure water supply in Burundi, the amount of water supplied by public utilities does not meet the demand of the population because population keeps increasing with fluctuation of weather conditions. This study selected north Bujumbura that is a sprawling new residential area in the western part of Burundi as a case to investigate the potential of rainwater harvesting in meeting water demand of the country. Based on a long-term average monthly precipitation in the region, the rainwater harvesting potential was assessed as a function of roof sizes, number of households, and runoff coefficients of roof materials. For the entire region of north Bujumbura, the current water supply capacity of the local water company combined with the rainwater harvesting potential resulted in the water surplus of $468,604.1m^3/yr$. Although three communes among them still showed water deficit in dry season, they still got help from rainwater to relieve their water shortage. This suggests that at the regional scale, proper storages and water quality control for harvestable rainwater could contribute to relieving the regional water shortage and allow the population growth.

• 한국주거학회논문집
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• 제25권3호
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• pp.53-62
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• 2014

This paper investigates whether the use of Rainwater Harvesting Systems (RWHSs) to provide water for washing machines in Hong Kong residential buildings would be financially attractive. In such systems, rainwater is accumulated and reused for doing laundry, garden irrigation, flushing toilets, and even drinking. Thus, the analysis of RWHSs' financial feasibility is essential for construction projects. RainCycle is used to validate financial feasibility, considering particular circumstances and data relevant to the Hong Kong context. A range of different scenarios by adjusting three factors are evaluated: catchment area, water demand, and discount rate. It is suggested that $2,000m^2$ would be a suitable catchment area in a typical Hong Kong residential building and it is demonstrated how water demand and discount rate influence the financial performance of RWHSs. In particular, the financial performance of RWHSs is sensitive to discount rates. The results suggest that the RWH system would be worthwhile for buildings with a lower number of floors, but would barely achieve financial validation in Hong Kong's super high-rise residential buildings.

• KIEAE Journal
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• 제7권2호
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• pp.25-30
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• 2007

The purpose of this research is to analyze the water quantity of the rainwater detention system based on the Planning Simulation in Residential Areas. The contents of this research consists of two main parts. The first part is to calculate the supply water quantity of the rainwater detention system and the demand water quantity of the Wonheungs' ecological park. The second part is to analyze the difference between demand and supply of water quantity, based on the Planning Simulation, in the rainwater detention system. This research will contribute to the establishment of the environment-friendly site planning methods which increase the quality of residential environment in apartment housing.