• 한국지리정보학회지
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• 제12권2호
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• pp.111-119
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• 2009

본 연구의 목적은 생태도시 구상을 위한 토지용도의 적지분석을 위한 방법으로 GIS를 활용하여 생태환경을 정리, 분석하여 지역 및 공간에 대한 적합성을 판정하는 것이었다. 적합성 판정에 영향을 미치는 생태환경 요소로서 표고, 경사, 수계/저류지, 비오톱, 토양생산성, 시각민감도, 식생, 녹지연결성 등 8가지를 선정하였다. 각 요소의 범주를 개발 및 보존가치에 따라 5등급으로 등급화하고, 각 요소별 가중치를 부여하였다. 도면중첩은 최대값을 이용하였으며, 분석의 최종단계에서 5등급의 토지 적합성 등급을 제시하였고 이에 따라 개발, 보전, 절대보존 공간 등 등급별로 토지용도를 제안하였다.

• 한국산림과학회지
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• 제90권4호
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• pp.573-581
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• 2001

본 연구는 산불재해 방지기금을 지불수단(payment vehicle)으로 한 2단계(二段階) 2선(二選) 가상가치추정법(double-bounded dichotomous choice DVM)을 사용하여 산불예방을 위한 서울 시민의 평균 지불의사 금액과 금액에 영향을 미치는 변수들의 영향력 정도를 정산하였다. 자료는 19~59세의 서울시민들 중에서 2단계 군집표본추출 방법으로 선택된 500명을 대상으로 개별 대면 면접하여 수집하였다. 분석결과 면접대상인 서울시민의 과반수(64.6%)가 산불재해 방지기금에 대한 지불의사가 있었다. 이들의 평균 지불의사금액은 7,016원이였으며, 지불의사가 없는 응답자들을 포함하면 평균 4,532원이었다. 이를 근거로 19세부터 59세까지의 전체 서울시민들의 총 지불의사금액은 34,165,758,000원으로 집계되었다. 관련변수의 지불의사금액에 대한 영향력을 와이블 비례위험함수 모형(Weibull proportional hazard model)으로 검토한 결과, 교육수준이 높을수록, 환경보존에 대한 필요성을 크게 느끼는 사람들일수록, 또한 산불로 인한 영향을 부정적으로 볼수록 높은 것으로 나타났다.

• Journal of Forest and Environmental Science
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• 제29권1호
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• pp.49-57
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• 2013

Malaysia possesses about 1.56 million ha of Peat Swamp Forest (PSF). The PSF safeguard enormous biological diversity, while providing crucial benefits for the sustainable development of human communities. Numbers of threatened plant species are associated with the PSF, including the commercially important Gonystylus bancanus timber. To prevent significant losses of biodiversity, it is important to manage the PSF for both biological conservation and sustainable use. Equally important is to restore all degraded PSF in an attempt to ensure the PSF ecosystem is suitable for the vegetation to grow and rehabilitate back to the normal condition. Prior to plan any forest restoration program, there is a need to properly map the degraded PSF in order to estimate the forest conditions and determine the vegetations status. Most of the time this need to be done at a landscape level and requires a technology that can provide accurate, timely and reliable information for the planner to make decision. This paper describes a study using geospatial technology in combination with ground survey to classify the degraded PSF in South East Pahang Peat Swamp Forest (SEPPSF), Malaysia, into different degree of vegetation classes. With map accuracy of about 83%, the technique proved to be useful in delineating the different degree of PSF degradation from which the information can be used to properly plan forest restoration program in the area. The final output which is in the form of map can be used in developing a Restoration Master Plan for the degraded PSF areas.

• 한국습지학회지
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• 제15권2호
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• pp.203-214
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• 2013

생태계내 생물종 분포는 환경조건에 의해 결정되므로 종의 분포를 확인하는 것은 중요하다. 본 연구는 경상북도 상주에 있는 공검지를 대상으로 2012년 4월에서 10월까지 식물상을 조사하였다. 조사결과 관속식물은 69과 176속 204종 2아종 29변종 5품종으로 총 240분류군이었다. 이중 특산식물은 3분류군, 식물구계학적 특정식물종은 질경이택사, 물옥잠, 노랑어리연꽃 등 11분류군, 귀화식물은 26분류군으로 귀화율은 10.8%로 나타났다. 수생식물은 31분류군으로 한국 수생식물의 17.8%에 해당된다. 따라서, 습지보존을 위하여 불필요한 인간의 간섭을 최소화하고, 생태계의 변화에 대한 지속적인 모니터링을 통하여 효율적인 관리대책을 마련하는 방안이 요구된다.

• Ecology and Resilient Infrastructure
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• 제2권4호
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• pp.296-304
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• 2015

급속한 기후변화에 따른 자연재해의 증가와 재해 규모의 대형화 및 다양화는 근본적인 해결 방안을 요구하고 있다. 특히 도시 공간은 도시 인구의 증가 현상과 불투수층의 기반시설에 기초하여 재해의 피해와 대응에 대한 복합적 대책을 수립해야 하는 실정이다. 이에 공공 공간인 도시의 녹색공간을 활용하여 방재공간을 확보하고, 재해저감형 공원시스템을 도입함으로써 토지 매입의 경제적 문제와 방재시스템의 문제를 동시에 해결할 수 있다. 각 지자체는 최근 발표된 국토교통부의 가이드라인을 통해 재해저감 유형별 시스템과 선도 사업을 선정하여 진행 중에 있다. 본 연구의 목적은 도시민의 생활 건강과 행복의 녹색 공간인 도보권 근린공원을 대상으로 도시의 물 관리와 소생태계 보전을 함께 갖추는 도시 녹지 공간을 방재형 근린공원의 조성 모델로 제시하는데 있다. 이를 통해 추후 기존 도시 구조 내 생활권 근린공원의 기후변화 적응 모델로 활용하는데 기여하고자 한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.2036-2041
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• 2005

The underwater multi-agent technology has many potential for the various activities related to ocean development/conservation in the near future. For example, in such fields as water pollution investigation, aquaculture control, or coral reef research, we feel a growing need for a system that realizes underwater continuous monitoring in the wide rang e. In this case, the target monitoring area will be sliced planar hierarchically toward the depth as monitoring layers, and many AUVs arranged on each layer track the given trajectory and gather various environmental information continuously, with communicating each other in the layer or with other layers. To realize those systems we need to develop AUV multi-agent technologies. So we are now building basic systems for basin experiment for the development of AUV multi-agent behavior. We must experience many situations and problems to be solved for the development of its elemental technologies by using real systems as well as our computer simulations. In this paper we introduce our concept of the experiment in the near future and the hardware/software design of our two types of handy AUVs and ultrasound ranging/communication system for that experiment. One AUV is designed using a 17inches-diameter glass sphere with DOS/V and RT-Linux based subsystems, which is intended to use not only in the basin but also in the calm real sea. The other AUV is designed for the basin experiment using a 7inches-diameter acrylic sphere with low-cost embedded system with SH-2 based subsystems. The basin experiment to verify the basic AUV facilities and ultrasound ranging for position detection was carried out.

• Journal of Forest and Environmental Science
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• 제34권1호
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• pp.31-45
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• 2018

At present the biodiversity of the riparian forest is under threat due to various anthropogenic pressures. Hence study was conducted along the three unprotected zones of riparian forest in Dikhu river, Nagaland, north-east India in order to compared the diversity, distribution and population structure of riparian trees. In each zone $100{\times}100m^2$ plot were marked and subdivided into 20 plots of $10{\times}10m^2$. 10 plots on each side of the river were taken randomly covering 0.02 ha. Only tree with dbh ${\geq}10cm$ and dbh above 1.5 m above ground level were recorded as individual species. A total of 29 tree species belonging to 18 families were recorded from the three zones of the river. Tree species richness was highest at the middle zone (19) followed by upper (14) and lower zone (7). The most abundant species and family recorded at upper, middle and lower zones were Melia azaderach of Euphorbiaceae ($380\;stems\;ha^{-1}$), Terminalia chebula of Euphorbiaceae ($432.5\;stems\;ha^{-1}$) and Duabanga grandiflora of Lythraceae ($365\;stems\;ha^{-1}$) respectively. The ranges of diversity indices observed in the three zones were: Shannon-Wiener index (1.25-0.73), Simpson diversity index (0.42-0.93), Evenness index (0.47-0.37) and Index of co-dominance (0.75-0.94). Rest of other indices were also estimated and compared. Distribution of trees shows the contagious pattern common in the upper and middle zones and regular in the lower zone. The girth size class analysis demonstrated that the riparian forest is in less mature succession stage. This study emphasize the need for management and conservation of riparian forest by developing policy to declare the riparian zone as protected area to prevent further degradation and loss of biodiversity from these unregulated zones along the river.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 춘계 학술발표회
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• pp.1409-1416
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• 2010

It is essential to predict a blasting-induced excavation damage zone (EDZ) beyond the proposed excavation line of a tunnel because the unwanted damage area requires extra support system for tunnel safety. Complicated blasting process which may hinder a proper characterization of the damage zone can be effectively represented by two loading mechanisms. The one is a dynamic impulsive load generating stress waves outwards immediately after detonation. The other is a gas pressure that remains for a relatively long time. Since the gas pressure reopens up the arrested cracks and continues to extend some cracks, it contributes to the final formation of EDZ induced by blasting. This paper presents the simple method to evaluate EDZ induced by gas pressure during blasting in rock. The EDZ is characterized by analyzing crack propagation from the blasthole. To do this, a model of the blasthole with a number of radial cracks of equal length in an infinite elastic plane is considered. In this model, the crack propagation is simulated by using three conditions, the crack propagation criterion, the mass conservation of the gas, and the adiabatic condition. As a result, the stress intensity factor of the crack generally decreases as crack propagates from the blasthole so that the length of the crack is determined. In addition, the effect of rock properties, initial number of cracks, and the adiabatic exponent are investigated.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 춘계학술대회
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• pp.180-183
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• 2011

최근 환경문제가 급격히 악화되고, 지구 환경의 보존이 중요한 이슈로 거론되면서 환경보호 정책과 연구가 절실히 요구되고 있다. 환경오염의 대상은 수질, 대기 등이 있으며, 대상 오염의 예방을 위한 오염원 절감 및 시스템적인 연구가 활발하게 진행 중에 있다. 이에 본 논문에서는 온도, 습도, 조도, 기압, 이슬점 등의 대기환경 정보와 용존산소량, 수소이온지수, 수온 등의 수질환경 정보를 수집하기 위한 이동성이 고려된 필드서버를 제작하여 연안 해양지역에 배치함으로서 일정 시간동안 변화하는 대기 상황을 판단하고 더불어 수질의 상태변화를 측정 및 모니터할 수 있도록 하였다. 또한 무선센서네트워크 내에서의 효율적인 데이터 전송을 위하여 측정된 대기 및 수질 환경정보를 무선센서네트워크 기반의 플러딩 라우팅 프로토콜 방식으로 전송하도록 고안하였다.

• 한국해양바이오학회지
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• 제2권1호
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• pp.1-10
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• 2007

Coral reefs are among the most dynamic and various ecosystems on tropical ecosystem. They provide a large number of important ecosystem services. Despite their importance, they appear to be one of the most susceptible marine ecosystems. Dramatic decreasing of coral reefs has been reported from every part of the world. Indonesia contains 18% of coral reefs of world's total. Unfortunately the status of coral reefs in Indonesia is already in critical and poor condition. Coral reefs communities in Indonesia are subjected to a variety of environmental disturbance. Threats to Indonesia's coral reefs resources can be divided into two main types: anthropogenic and natural disturbances. The major anthropogenic disturbances on coral reefs in Indonesia are destructive fishing, pollution, coastal development, mining and harvesting live fish and coral, tourism. The natural disturbances such as cyclones, volcanic eruptions, earthquakes, tsunami and predator also contribute to coral reefs destruction in Indonesia. In my paper I tried to compare between natural and anthropogenic disturbances on coral reefs in Indonesia and raised these questions: (i) how the natural disturbances differ from anthropogenic area (ii) which type of disturbances has caused the greatest impact on coral reef ecosystem. My finding is that both of anthropogenic and natural disturbances give major impact on coral reefs in Indonesia. The important issue here is coral reef resilience could be disturbed by synergistic effects between various anthropogenic and natural disturbances. This phenomenon has significant conservation and management implication. The appropriate management should be conducted to protect coral reefs ecosystem in Indonesia. Mangrove management will succeed only when local people are involved and get sustainable benefits from mangrove ecosystem. Community based management and Integrated Coastal Zone Management (ICZM) are type of management that can be applied on coral reef ecosystems in Indonesia.