• Spatial Information Research
• /
• 제10권4호
• /
• pp.501-513
• /
• 2002

Eurasian otter (Lutra lutra) is one of endangered wildlife species whose population size is declining in Korea. To manage and conserve habitat for Eurasian otter, it is crucial to understand which habitat components affect otter habitat qualities. The objectives of this study were to develop a habitat suitability model of Eurasian otter in Soraksan National Park, to validate the model in Odaesan National Park. The research methods of this study were as follows. First, trace data and characters of Eurasian otter habitat were collected with Geographic Information System (GIS) data and Global Positioning System (GPS) receivers between 2000 and 2002. Second, the habitat use factors were identified as habitat characteristics of Eurasian otter and classified with habitat use and availability analyses. Third, significant factors of habitat model were extracted by Chi-square test. The last, Eurasian Otter Habitat Suitability Model (EOHSM) was employed by logistic regression method. Otter habitat use was positively associated with the reeds and shrubs areas adjacent to streams, the size of boulders, and low human disturbance in Soraksan National Park by EOHSM. This model had a classification accuracy of 74.4% at cutoff value of 0.5. Model validation showed a classification accuracy of 86.6 % at cut off value of 0.5 for otter habitat in Odaesan National Park.

• Spatial Information Research
• /
• 제8권1호
• /
• pp.85-99
• /
• 2000

보호동물사에 대한 서식지 분포정보는 개발압력이 심한 우리나라에서는 서식지 관리에 있어 매우 중요하다. 본 연구는 GIS와 로지스틱 회귀분석을 이용하여 멧돼지의 서식지 적합성모형을 개발하여 서식지 분포도를 작성하고 본 연구의 결과를 토대로 현재 우리나라의 멸종위기종과 야생동물보호종들의 서식지 관리를 위한 기초를 마련하고자한다. 서식지 모형을 구현하기 위한 연구내용 및 방법은 다음과 같다. 첫째, 멧돼지의 서식지 특성을 파악하기 위하여 GIS 자료를 구축하였다. 멧돼지의 위치파악을 위해 원격무선측정기법과 GPS를 이용하였다 둘째, 멧돼지의 서식지 이용과 유용성에 영향을 미치는 환경인자를 파악하기위해 원격무선측정기법과 GPS를 이용하였다. 둘째, 멧돼지의 서식지 이용과 유용성에 영향을 미치는 환경인자를 파악하기 위해 χ²검정(Chi-square test)을 실시하였다. 마지막으로, 최적 서식지의 분포를 예측하기위한 서식지 적합성모형 개발을 위해 로지스틱 회귀분석을 이용하였다. 본 연구의 결과는 다음과 같다. 첫째, 멧돼지의 서식지 이용특성 분석의 결과, 성별 그리고 활동유형별에서는 뚜렷한 차이를 볼 수 없으나, 계절별 그리고 서식지 유형별에서는 서식지 이용특성의 차이가 뚜렷한 것을 볼 수있었다. 둘째, 서식지 유용성 분석의 결과 멧돼지의 서식환경에 영향을 미치는 자연적인 환경요인으로 표고, 향, 임상 그리고 영급이 유의성이 있는 인자로 나타났다. 반면에, 경사, 능선/계곡 , 물 그리고 일사량의 경우 통계적 유의성이 적어 전반적으로 서식지를 결정하는 환경인자라고 볼 수 없었다. 마지막으로, 개발된 서식지 적합성모형의 결과 예측확률 0.5를 기준으로 전제서식지는 75.00%, 커버서식지는 84.26% 의 높은 분류정확도를 나타내었다. 모형검증의 결과 대상지 내부의 경우 전체서식지가 75.00%로 나타나 본 모형이 신뢰성이 있는 것으로 판단되었다.

• Journal of Forest and Environmental Science
• /
• 제39권2호
• /
• pp.65-72
• /
• 2023

The endangered species of Cyathea spinulosa (tree ferns) are among the least concerned ferns of Nepal that bring threats to them and their habitat. A way to reduce such threats is by maintaining a database of species' whereabouts and generating a scientific understanding the habitat preferences. This will eventually help in the formulation of conservation plans for the species. This research aimed to characterize the suitable habitat of C. spinulosa by enumerating the location of species in the Panchase Forests of central Nepal. The statistical index method was applied to relate the occurrence locations of species with various environmental factors for the development of indices. The suitable habitat of C. spinulosa (more and most suitable categories) covered 119 km² and accounted for 43% of the total area studied. 74.4% of occurrence locations of C. spinulosa were recorded from these habitats. The habitat characteristics suitable for C. spinulosa were: proximity to streams (high moisture), land covered by forested area (shady area), mid-elevations of hills about 1,000 m to 2,000 m (sub-tropical climate), slope gradient of 20° to 40° (steep slopes), and northern to eastern aspects. These habitat characteristics could be considered for in-situ protection of tree ferns and designating the conservation plots.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.15-17
• /
• 2003

One of the most serious problems that the world is facing is the loss of biodiversity and habitats as a result of environmental degradation. There are several strategies to protect the habitats and biodiversity within a certain region such as establishing protected areas; monitoring the remaining forests and managing the landscape within limits have been employed. In this study, Predicted Habitat Distribution Model (simple spatial modeling) was developed using vegetation types, land use and land cover, DEM, slope, drainage, roads, human settlement areas and minimum habitat requirements of each species. Then, based on the checklist of presence and absence of each species, the final habitat maps for selected endangered species are generated. Integration of Remote Sensing (RS) and Geographical Information System (GIS) has proven a very effective tool to generate wildlife habitat maps at various levels. An effecting mapping could be performed based on satellite remote sensing and modeling biodiversity indicators in GIS.

• 한국조경학회지
• /
• 제32권4호
• /
• pp.28-38
• /
• 2004

Korean goral (Nemorhaedus caudatus raddeanus) is one of the endangered species in Korea, and the rugged terrain of the Soraksan National Park (373㎢) is a critical habitat for the species. But the goral population is threatened by habitat fragmentation caused by roads and hiking trails. The objective of this study was to develop a potential habitat suitability model for Korean goral in the park, and the model was based on the concepts of fuzzy set theory and multi-criteria evaluation. The process of the suitability modeling could be divided into three steps. First, data for the modeling was collected by using field work and a literature survey. Collected data included 204 points of GPS data obtained through a goral trace survey and through the number of daily visitors to each hiking trail during the peak season of the park. Second, fuzzy set theory was employed for building a GIS data base related to environmental factors affecting the suitability of the goral habitat. Finally, a multiple-criteria evaluation was performed as the final step towards a goral habitat suitability model. The results of the study were as follows. First, characteristics of suitable habitats were the proximity to rock cliffs, scattered pine (Pinus densiflora) patches, ridges, the elevation of 700∼800m, and the aspect of south and southeast. Second, the habitat suitability model had a high classification accuracy of 93.9％ for the analysis site, and 95.7％ for the validation site at a cut off value of 0.5. Finally, 11.7％ of habitatwith more than 0.5 of habitat suitability index was affected by roads and hiking trails in the park.

• 한국환경복원기술학회지
• /
• 제24권5호
• /
• pp.1-14
• /
• 2021

Excessive development and urbanization have destroyed animal, plant, habitats and reduced biodiversity. In order to preserve species diversity, habitat prediction studies are have been conducted at home and overseas using various modeling techniques. This study was conducted to suggest optimal habitat modeling research by comparing HSI and MaxEnt, which are widely used among habitat modeling techniques. The study was targeted on the endangered species of Prionailurus bengalensis in nearby areas (5460.35km2) including Cheonan City, and the same data were used for analysis to compare those models. According to the HSI analysis, Prionailurus bengalensis's habitat probability was 74.65% for less than 0.5 and 25.34% for more than 0.5 and the top 30% were forest (99.07%). MaxEnt's analysis showed that 56.22% of those below 0.5 and 43.79% of those above 0.5 were found to have a high explanatory power of 78.3% of AUC. The Paired Wilcoxn test, which evaluated the significance of thoes models, confirmed that the mean difference between the two models was statistically significant (p<0.05). Analysis of the differences in the results of those models using the matrix table shows that score 24.43% HSI and MaxEnt was accordance,12.44% of the 0.0 to 0.2 section, 7.22% of the 0.2 to 0.4 section, 2.73% of the 0.4 to 0.6 section, 1.96% of the 0.6 to 0.8, and 0.08% of the 0.9 to 1.0. To verify where the score difference appears, the result values of those models were reset to values from 1 to 5 and overlaid. Overlapping analysis resulted in 30.26% of the Strongly agree values, 56.77% of the agree values, and 11.92% of the Disagree values. The places where the difference in scores occurs were analyzed in the order of forest (45.23%), agricultural land (34.57%), and urbanization area (7.65%). This confirmed that the analysis of the same target species within the same target site also has differences in forecasts depending on the modelling method. Therefore, a novel analysis method combining the advantages of each modeling in habitat prediction studies should be developed, and future study may be used to select Prionailurus bengalensis and species-protected areas and species protection areas in the future. Further research is judged to require higher accuracy studies through the use of various modeling techniques and on-site verification.

• 한국수자원학회논문집
• /
• 제45권2호
• /
• pp.229-242
• /
• 2012

본 연구에서는 괴산댐 하류 달천에서 성어기 피라미에 대한 물리 서식처 모의를 수행하였다. 이를 위하여 퍼지논리에 의한 서식처 적합도 지수를 산정하는 CASiMiR 모형을 이용하였다. 또한 모의결과를 서식처 선호도 곡선을 이용하여 서식처 적합도 지수를 산정할 수 있는 수리모형인 River2D 모형의 결과와 비교, 분석하였다. CASiMiR 모형의 수위 자료는River2D 모형을 통한 수위계산결과를 활용하였으며 현장측정자료와 비교한 결과 잘 반영하는 것을 확인하였다. 대상구간의 만곡부 상류 직선구간에 있는 여울에서 성어기 피라미의 서식처가 가장 적합한 것으로 나타났다. CASiMiR 모형의 경우$7.23m^3/s$의유량조건에서가중가용면적이최대값을보였고, River2D 모형은$9m^3/s$의 유량에서 최대 가중가용면적을 예측하였다. 또한 갈수량(Q355), 저수량(Q275), 평수량(Q185), 풍수량(Q95) 유량조건에서CASiMiR 모형은River2D 모형에 비해 가중가용면적을 0.3~25.3% 정도 과대 추정하는 결과를 보였다.

• 한국BIM학회 논문집
• /
• 제8권4호
• /
• pp.72-79
• /
• 2018

Rapid developments around the world have resulted in urban expansion, habitat destruction, habitat fragmentation, and pollution problems, which are the main reasons for the decline in biological diversity. The United Nations warns that many animals and plants will die out in the near future if this continues. This study was performed to propose a map of eco-corridor suitability analysis of Korean water deer(Hydropotes Inermis) to enhance biodiversity in Chuncheon city. Eight factors affecting habitat suitability were elevation, aspect, slope, forest type, distance to the road, distance to the stream, land use and green connectivity. Previous study analysis on the mobility behaviour of the Korean water deer(Hydropotes Inermis) produced a habitat suitability map by determining the threshold and assigning a value between 0 and 1 depending on the habitat suitability using the fuzzy function. A method of analysis was proposed for a number of eco-corridor through comparative analysis of the data from the produced habitat suitability map and the road-kill point. The previous studies were focused on Backdudaegan region and national parks except for urban cities. The potential habitat map of Korean water deer could be helpful as a way to prevent habitat disconnection and increase species diversity in urban areas.

• 한국수자원학회:학술대회논문집
• /
• 한국수자원학회 2005년도 학술발표회(1)
• /
• pp.121-122
• /
• 2005

• 한국수자원학회:학술대회논문집
• /
• 한국수자원학회 2007년도 학술발표회 논문집
• /
• pp.2039-2043
• /
• 2007

Like other major river basin systems in the West of the United States the Platte River Basin are faced with the challenges of allocating more water for plant and animal species. A part of the Central Platte River was designated as critical habitat for the whooping crane in 1978. The water allocation system in the Platte River Basin is dominated by the Prior Appropriation Doctrine, which allocates water according to the priorities based on the date of water use. The Platte River Basin segregated into five subregions for purpose of analysis. 24 years of historic records of monthly flow and all the demands were complied. The simulation of river basin modeling includes physical operation of the system including water allocation by water rights and interstate compact agreements, reservoir operations, and diversion with consumptive use and return flow. MODSIM, a generalized river basin network model, was used for estimating the timing and magnitude of impacts on river flows and diversions associated with water transfers from each region. A total of 20 alternatives were considered, covering transfers from each of the five regions of basin with several options. The result shows that the timing and availability of augmented water at the critical habitat is not only a function of use by junior appropriators, but also of river losses, and timing of return flows.