• 한국지하수토양환경학회지:지하수토양환경
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• 제23권3호
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• pp.10-26
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• 2018

This paper reviews the soil conservation policies (SCP) in the global community and suggests the improved options in SCP in Korea. Soil Environment Conservation Act in Korea states soil is a valuable natural resource and it's value should be enhanced to provide the benefits that soil ecosystem can offer to people. However, SCP in Korea limits its application to not only the scope of soil environment but also the issues on soil pollution. The SCPs in the advanced countries have shifted their scopes from soil environment to soil ecosystem, put emphasis on the conservation of soil health rather than soil quality, and set the goals to optimize the soil ecosystem services to people while minimizing the soil threats. In this context, the soil security initiative was recently proposed to accomplish this goal while employing the nexus concept to bridge the soil ecosystem services with water, atmosphere, climate and biodiversity. Therefore, the key policies in soil conservation in Korea should expand the scope from soil environment to soil ecosystem, focus on soil health management, and develop the holistic governance among diverse stakeholder to maximize the soil ecosystem services. Soil ecosystem should be secured by national soil policies for human health.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.143-145
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• 2021

시화호는 초기 목적인 담수호 개발을 심각한 환경 오염으로 달성하지 못한 채 해수로 복구되었다. 파괴와 복원의 시간 동안 시화호의 생태계는 변화를 겪어왔는데, 특히나 철새가 많이 지나는 곳이었기 때문에 조류 생태계에 가시적인 변화가 나타났다. 이에 따라 본 연구는 총 8가지 Ecosystem Index를 바탕으로 시화호 조류 생태계의 변화를 분석하였다. 그리고 더 나아가, 경사 하강법을 적용하여 그간 환경 오염의 척도로도 이용되었던 COD (Chemical Oxegen Demand, 화학적 산소 요구량)지수가 앞서 언급한 8가지 중 3가지 Ecosystem Index의 함수로 표현하였다. 이는 직접적인 환경에 대한 측정 및 정보 수집 없이 생태계의 정보만으로 환경 자체의 상태를 파악할 수 있다는 점에서 큰 가치가 있으며, 더 쉽게 구해낼 수 있기에 그 범용성이 넓다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2018년도 학술발표회
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• pp.355-355
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• 2018

Natural hydrology systems, including high flow and low flow events, are important for aquatic ecosystem health and are essential for controlling the structure and function of ecological processes in river ecosystems. Ecosystem responses to flow changes have been studied in a variety of ways, but little attention has been given to how episodic typhoons and atmospheric circulation patterns can change these hydrologic regime-ecological response relationships. In this diagnostic study, we use an empirical approach to investigate the salient features of interactions between atmospheric circulation, climate, and runoff in the five major Korean river basins.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회(2)
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• pp.1369-1370
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• 2005

• 한국환경복원기술학회지
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• 제18권2호
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• pp.1-17
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• 2015

Ecological reservoir is a multifunctional space where provides the functions of retention, animal habitat and improvement of ecosystem health and landscape. The ecological reservoir of Anteo Eco Park located in Gwangmyeong-si has established to functions for water purification, maintenance of healthy aquatic ecosystem. Because the Anteo Eco Park is located in the site where nonpoint pollutant materials flow in, Anteo Eco Park has potential factors which aquatic ecosystem health deteriorates and damages the habitat of golden frog(Rana plancyi chosenica) which is restoration target species. Therefore, the purpose of this study is to suggest the plan to manage the variables which impede the right functions of aquatic ecosystem by understanding the causal loop diagram for the change of water quality environment and the interaction of predator-prey through system thinking. The results are as follows. First, the study showed that the individual number of golden frog which is an indicator species of Anteo Eco Park is threatened by snakeheaded fish, which is an upper predator. Therefore, balanced food chain should be hold to protect golden frog by capturing the snakeheaded fish which is individual number's density is high, and the monitoring management of the individual number for predator(snakeheaded fish)-prey(golden frog) should be performed. Second, the study represented that water pollution and carnification is caused by the sediment as the dead body of the large emergent vegetation in the winter cumulates as sediment. Ecological reservoir in Anteo Eco Park has been managed by eliminating the dead body of the large emergent vegetation, but the guideline for the proper density maintenance of vegetation community is additionally needed. Lastly, the study showed that aquatic ecosystem of Anteo Eco Park where is contaminated from the inflow of nonpoint pollutants affects the individual number's decline of golden frog and snakeheaded fish. Accordingly, the creation of a buffer area and a substitution wetland is needed in the periphery of the Anteo Eco Park to control the inflow of nonpoint pollutants including organic matters, nutrients and heavy metals. This study will be helpful that Anteo Eco Park improves the regional landscape and maintain healthy aquatic ecosystem space for the park visitors including local residents.

• 환경생물
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• 제17권4호
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• pp.521-527
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• 1999

강진만의 생태계의 변화를 조사하기 위해 1998년 2월부터 11월까지 계절별로 주요인 분석을 수행하였다. 이러한 목적을 위해 영양염류, 수온, 염분도, COD, DO, 종속영양세균, 균류 그리고 분변성 대장균 등의 항목들이 6개의 정점에서 조사되었다. 이들 항목을 상관분석과 주요인분석 등의 통계처리를 한 결과 강진만의 생태계는 계절에 따라 2∼4개의 요인에 의하여 영향을 받고 있는 것으로 조사되었다. 그 중에서 특히 담수유입에 따른 영양염류, 부유물질, 염분도 및 수온의 변화 등이 강진만 생태계에 영향을 미치는 요인으로 나타났다. 그리고 다른 만에 비해 강진만에 미치는 환경요인의 영향은 비교적 적었던 것으로 판단되었다.

• 한국조경학회지
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• 제18권2호
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• pp.111-125
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• 1990

Korea is a nation with poor natural resources. There is a greats need to save resources that are running out in fast face. The purpose of this thesis is to bind the means to save rosources in housing site, especially in highrise apartment. The reason why the high-rise apartments are chosen as a case is 7hat the high-rise is becoming the major form of dwelling in most urban areas. As a tool of saving the ecological way is chosen because ecological energy is free, clean and unlimited. The resources to be saved are divided into two categories, namely energy and non - energy resources as water, land and food. The contents of the thesis are comprised of 4 chapters. The early chaspters are devoted to the understanding of the ecosystem and problems of current energy consumption in the apartment. It is fellowed by the introduction of the hypothesis that can possibly save reouruces. The hypothesis are then transformed into the actual theories through verification, to be established as the new techniques of the site planning. The ecosystem is the functional relationship between the living organisms and their physical surroundings. The living organisms are the plants that produce, animals that consume and bacterias that decompose. They live in the environment which consists of the three worlds of atmosphere, hydrosphere and lithosphere. The whole system is activated by the solar energy that turns the inorganic mallet- into the living organism and back to the inorganic. It is the recycling principle of the ecosystem. The elements of ecosystem that fan be unilimited as the tools of resources -saving are the sun, wind, water, soil, plant and waste. They are unlimited sources of energy. free of pollution and cheap in price. Each of these ecological elements Provide the opportunities that can save the heating fuel, air conditioning energy, water resource, land and food. The ecological approch should be pursued actively in this age of short resources and growing pollution. In the scale of total energy consumption the housing takes the second position next to the industrial use. It is followed by the transportation which shows for less consumption than former two.

• 한국수산과학회지
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• 제35권4호
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• pp.356-365
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• 2002

One of the most important factors that cause eutrophication is nutrient materials containing nitrogen and phosphorus which stem from excreation of terrestial sources and release from sediment. Therefore, to improve water quality, the reduction of these nutrients loads should be indispensible. At this study, the three-dimensional numerical hydrodynamic and ecosystem model, which was developed by Institute for Resources and Environment of Japan, were applied to analyze the processes affecting the eutrophication. The residual currents, which were obtained by integrating the simulated tidal currents over 1 tidal cycle, showed the presence of a typical counterclockwise eddies between Gyewha and Garyuk island. Density driven currents were generated westward at surface and eastward at the bottom in Saemankeum area where the fresh waters are flowing into, The ecosystem model was calibrated with the data surveyed in the field of the study area in annual average. The simulated results were fairly good coincided with the observed values within relative error of $30\%$. The simulations of DIN and DIP concentrations were performed using ecosystem model under the conditions of $40\~100\%$ pollution load reductions from pollution sources. In study area, concentration of DIN and DIP were reduced to $59\%$ and $28\%$ in case of the $80\%$ reduction of the input loads from fresh water respectively. But pollution loads from sediment had hardly affected DIN and DIP concentration, The $95\%$ input load abatement is necessary to meet the DIN and DIP concentration of second grade of ocean water quality criteria.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2019년도 학술발표회
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• pp.149-149
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• 2019

Gross Primary production (GPP) and evapotranspiration (ET) are the two critical components of carbon and water cycle respectively, linking the terrestrial surface and ecosystem with the atmosphere. The ratio between GPP to ET is called ecosystem water use efficiency (EWUE) and its quantification at the forest site helps to understand the impact of climate change due to large scale anthropogenic activities such as deforestation and irrigation. This study was conducted at the FLUXNET forest site CN-Qia (2003-2005) using Community land model (CLM 5.0). We simulated carbon and water fluxes including GPP, ecosystem respiration (ER), and ET using climatic variables as forcing dataset for 30 years (1981-2010). Model results were validated with the FLUXNET tower observations. The correlation showed better performance with values of 0.65, 0.77, and 0.63 for GPP, ER, and ET, respectively. The model underestimated the results with minimum bias of -0.04, -1.67, and -0.40 for GPP, ER, and ET, respectively. Effect of climate 'CLIM' and '$CO_2$' were analyzed based on EWUE and its trend was evaluated in the study period. The positive trend of EWUE was observed in the whole period from 1981-2010, and the trend showed further increase when simulated with rising $CO_2$. The time period were divided into two parts, from 1981-2000 and from 2001 to 2010, to identify the warming effect on EWUE. The first period showed the similar increasing trend of EWUE, but the second period showed slightly decreasing trend. This might be associated with the increase in ET in the wet temperate forest site due to increase in climate warming. Water use efficiency defined by transpiration (TR) (TWUE), and inherent-TR based WUE (IT-WUE) were also discussed. This research provides the evidence to climate warming and emphasized the importance of long term planning for management of water resources and evaporative demand in irrigation, deforestation and other anthropogenic activities.

• 생태와환경
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• 제57권2호
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• pp.83-91
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• 2024

본 연구는 한국의 멸종위기야생생물 II급으로 분류된 기수갈고둥 (Clithon retropictum)과 생태계 내 다른 종들 사이의 공동출현 양상을 분석하고자, 연관 규칙 학습과 군집분석 방법론을 통합적으로 사용했다. 이 연구의 주요 목적은 기수갈고둥과 다른 생물종 사이의 공동출현 패턴을 파악하는 것이다. 대규모 데이터 세트를 통한 연관 규칙 학습으로 종 간의 공동 출현 패턴과 그들사이의 연관성을 탐색하였고, K-mean와 계층적 군집분석을 통해 종들 간의 생태적 유사성과 차이에 기반으로 한 그룹화를 진행하였다. 연구 결과는 기수갈고둥과 다른 종들 사이에 상당한 공동 출현 관계가 있음을 보여주며, 이러한 공동 출현은 특정 환경 조건과 밀접하게 연결되어 있음을 나타냈다. 특히, 기수갈고둥이 출현하는 지점에서는 특정종의 출현 빈도가 높게 나타나는 패턴을 보였고, 이는 기수갈고둥이 생태계 내에서 중요한 생물지표종으로서의 역할을 수행하고 있음을 시사한다. 이러한 접근 방식은 기수갈고둥과 같은 멸종 위기종의 보존과 생태계 관리 전략 수립에 있어 중요한 의미를 지닌다. 생태계 내에서 공동으로 출현하는 종들 간의 복잡한 연관성을 이해함으로써, 보다 효과적인 보존 전략을 개발하고 생태계의 건강과 안정성을 유지하는 데 기여할 수 있다. 본 연구는 생태계 연구에 있어 데이터기반 접근법의 중요성을 강조하며, 생물 다양성 보존을 위한 새로운 방향을 제시한다.