• 한국물환경학회지
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• 제20권5호
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• pp.397-408
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• 2004

Due to the growing impact of non-point source pollution and limitation of water treatment technology, a new policy of water quality management, called a source protection, is now becoming more important in drinking water supply. The source protection means that the public agency purchases the pollution sensitive area, such as riparian zone, and prohibit locations of point and non-point sources. Many studies have reported that this new policy is more economical in drinking water supply than the conventional one. However, it is very difficult to determine location and size of the pollution sensitive zone in the watershed. In this paper, we presented the scientific criteria for the priority of the pollution sensitive zone, along with a case study of the upstream watershed of the Paldang Reservoir, Han River. This study includes applications of the analytical hierarchy process(AHP) and a watershed-based land prioritization(WLP) model. After major criteria affecting water quality were selected, the AHP and geographic analysis were performed. The WLP model allowed us to include both quantity and quality criteria, using AHP as the multi-criteria method in making decision and reflecting local characteristics and various needs. By adding a travel-time function, which represents the prototype effectively, the results secured adaptability and scientific objectivity as well. As such, the WLP model appeared to provide reasonable criteria in determining the prioritization of land acquisition. If the tested data are used with a validated travel-time and AHP method is applied after further discussion among experts in such field, highly reliable results can be obtained.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2017년도 학술발표회
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• pp.6-6
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• 2017

본 연구의 목적은 독립적으로 수행되어진 하천 복원 가치추정 선행연구들을 대상으로 메타회귀분석을 활용한 편익이전을 제시함으로써, 편익이전의 타당성 및 적용 가능성을 검토하는 데 있다. 문헌검색을 통해 '하천 가치평가', '하천 가치', '물 환경 가치추정', '하천 편익' 등에 관한 자료를 수집하였으며, 총 60편의 연구를 수집했다. 그 중 중복된 연구를 제외하고 가치추정 단위를 '원/년/가구'로 통일함으로써 51편의 연구를 분석에 사용했으며, 90개의 가치 추정치가 실증분석에 사용되었다. 본 연구는 국내에서 수행된 하천 복원 가치 추정연구를 집대성하여 DB를 구축하고 요약통계량을 중심으로 선행연구 결과를 기술하였으며, 메타회귀분석을 실시한 후, policy site의 특성과 조건에 맞게 함수를 조정하고, 조정된 함수를 사용하여 policy site의 가치를 예측하였다. 종속변수로는 총 가치(원/년/가구, 2015년 불변가격)가, 독립변수로는 하천유형, 위치, 규모, 환경 서비스특성, 그리고 방법론 특성, 지불형태, 대상지 사회경제적 특성 변수들이 포함되었다. 모형의 추정결과 조정된 값은.420으로써 종속변수 총변이의 42.0%를 모형이 설명하는 것으로 나타났다. 메타회귀분석을 통해 본류에서 멀어지는 소규모하천일수록 하천의 경제적 가치를 더 크게 느끼는 것으로 나타났으며, 전체적인 영향력 크기를 고려해 본다면 하천을 복원할 때 수질정화기능, 서식지기능, 이수기능, 치수기능, 여가 및 수변공간으로의 기능 순으로 고려하는 것이 하천의 가치를 보다 높일 수 있을 것으로 보였다. 또한 지불방법은 매월, 인당 지불하는 것으로 제시할 때 경제적 가치 추정치를 높일 수 있는 것으로 해석되었다. 모델추정 결과를 활용한 함수이전에서는 만경강의 특성을 반영하고 조정함으로써 만경강의 가치를 추정하였으며, 모형으로부터 얻은 만경강 가치 예측치는 가구당 매년 41,214원으로 추정되었다. 본 연구의 메타회귀분석은 선행연구를 객관적으로 종합할 수 있는 분석의 틀로서 충분한 활용 타당성이 인정되는 것으로 보이며, 편익이전 시에 policy site의 자원특성과 조건에 맞춰 함수를 조정하여 예측치를 제시함으로써 메타회귀분석 함수이전의 융통성을 보여주었다. 이에 메타회귀분석을 통한 편익이전은 타당성 및 적용 가능성 측면에서 긍정적으로 판단된다.

• 대한토목학회논문집
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• 제26권3D호
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• pp.375-383
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• 2006

국회주차장은 지속적으로 증가하는 주차수요와 함께 주차장 이용을 무료로 개방하여 상근자들의 장시간 주차, 국회방문 공무원 및 민간차량의 자가용이용 선호, 국회업무이외에 주변 상가나 오피스 이용차량의 국회주차장 무단 점유 등으로 주차시설의 부족현상이 심화되고 있다. 국회내 주차수요와 공급의 불균형으로 국회내부 및 외부 도로상의 불법주차차량으로 국회주차질서는 매우 무질서하다. 본 연구는 국회의사당의 주차실태 및 이용실태조사를 근간으로 단기적으로 유출 입 관리시스템 구축, 중 장기적으로 국회주차장의 유료화 및 관리운영의 민간위탁, 주차장 상한제 폐지를 통한 입체주차장 건설과 지상주차장의 공원화 방안 등 적극적인 주차관리대책을 제시하였다. 새로운 주차관리대책과 병행하여 상근자 및 방문자의 주차수요를 관리하기 위해 요일제와 부제운행의 강화, 셔틀버스노선 및 통근버스 노선의 확대, 둔치주차장의 이용활성화 방안, 다양한 대중교통이용촉진대책의 시행를 제시하였다. 결론적으로 국회 주차문제는 시설공급보다 주차수요를 관리하는 수요관리정책이 더 적합하다.

• Journal of Ecology and Environment
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• 제31권2호
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• pp.125-129
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• 2008

To predict Daphnia secondary productivity along a trophic gradient indexed as total phosphorus (TP) concentration, we estimated energy transfer efficiencies from food quality for Daphnia such as eicosa-pentaenoic acid (EPA) or docosahexaenoic acid (DHA) content. Eleven flow-through Daphnia magna growth experiments were conducted with seston from 9 lakes, ponds and river waters. Primary productivities were estimated from food supply rates in the flow-through experiments, producing energy transfer efficiencies from seston to D. magna. We found DHA content was the best predictor of energy transfer efficiencies among the essential fatty acids. An asymptotic saturation model explained 79.6% of the variability In energy transfer efficiencies. Based on empirical data in this study and empirical models from literature, we predict that Daphnia productivity would peak in mesotrophic systems by decreasing food quality and Increasing food quantity along trophic gradient.

• 환경위생공학
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• 제10권1호
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• pp.1-11
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• 1995

We had passed through a serious water pollution with a rapid urbanization and industrialization in the 1960's. Seoul Chunggyechun Sewage Disposal System set uP in 1966 and finished in 1976, as the first sewage disposal system in Korea, had covered only 4 percentage of the sewage disposal system per capita for 10 years. Through holding the Asian Games in 1986 and the Olympic Games in 1988, we expanded the sewage disposal system so that it became increased 18 percentage of the population in 1986. Finally, we have installed about 60 sewage disposal system by 1994 for a large environmental investment which was critically caused by "Phenol Accident in Nakdong River" . Now, the sewage disposal system per capita covers 42 percentage and the activity for water quality improvement is going on rapidly. The method of sewage disposal is mainly "activated sludge process" . However, the technical ability for the sewage disposal has largely developed since 1991 so the "extended aeration process" is used in Po$\v{u}$n, Tangyang, Mun$\v{u}$i, "rotating biological contact process" in Onch$\v{u}$ng, Pukok, and "oxidation ditch process" in K$\v{o}$ch'ana.

• 경영과학
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• 제29권1호
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• pp.1-14
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• 2012

The goal of the multi-reservoir operation planning is to provide an optimal release plan that maximize the reservoir storage and hydropower generation while minimizing the spillages. However, the reservoir operation is difficult due to the uncertainty associated with inflows. In order to consider the uncertain inflows in the reservoir operating problem, we present a Stochastic Dynamic Programming (SDP) model based on the markov decision process (MDP). The objective of the model is to maximize the expected value of the system performance that is the weighted sum of all expected objective values. With the SDP model, multi-reservoir operating rule can be derived, and it also generates the steady state probabilities of reservoir storage and inflow as output. We applied the model to the Geum-river basin in Korea and could generate a multi-reservoir monthly operating plan that can consider the uncertainty of inflow.

• 한국농공학회:학술대회논문집
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• 한국농공학회 2003년도 학술발표논문집
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• pp.91-94
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• 2003

In this study we propose the improvement countermeasure of disaster prevention by analyzing the damage cause and issue point from examination by Typhoon "maemi" in Kyongsangnamdo region. The main damage cause by Typhoon "maemi" in this region is the rising of water level in river and the overflowing of bank. The basic countermeasure is executing the disaster policy enforcement for the improvement of agriculture infrastructure facilities.

• 한국환경복원기술학회지
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• 제5권3호
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• pp.58-65
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• 2002

This study synthesizes previous research accomplishments with analysis of problems and counterplan for the riparian forest zone management and ongoing research strategy is suggested. If a part of budgets for water use allotments is supported for forest watershed owner, this policy for the forest owner could encourage the forest management of watershed. Integrated riparian forest management guideline in city and county needs to be established for the implementation of government guidelines. Base on the guideline, working plans of city and county could be evaluated. Public Forest Tending Work for stream water quality and quantity conservation should be enlarged for forest watershed and forest area management in five big river watersheds. Forest watershed should be managed with a connected system for a pollutant reduction strategy in urban and industrial areas.

• 환경영향평가
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• 제13권3호
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• pp.103-114
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• 2004

As most of environmental impacts caused by development projects are irrevocable, a thorough review is utmost necessary. Ecological-economic integrated approach inspired by Norgaard's co-evolution theory should be applied to the environmentally adjusted CBA, which plays a decisive role in the feasibility analysis. Based on case studies of NamHan River Management Project and Yeongsangang Wetland Reclamation Project, this paper attempts to show the usefulness of linking basic plan and implimentation design to EIA and suggests to integrate EACBA into the current EIA system institutionally as a more effective policy tool for realizing sustainable development in Korea.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.18-20
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• 2003

Land cover change detection is one of the most important trends in which remote sensing data could be used to assist strategists and the planners to decide the best land use policy. Two images of NOAA-AVHRR and SPOT vegetation acquired in November 1992 and 2002 were used to assess the changes of Agricultural lands in Egypt. A supervised classification together with two change images derived from classification result and NDVI were used to evaluate the trend and form of the change. It was found that agricultural areas increased by about 14.3 % during the study period in particular around the River Nile Delta and near the Northern Lakes of Egypt. The new cultivated lands were extracted mainly from the desert and from the salt marches areas. At the same time, parts of the agricultural lands were turned into non-cultivated land because of the urban expansion and soil degradation.