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광역스케일의 환경 인자를 이용한 어류, 식물, 조류 종수의 공간적 분포에 대한 모델링 -일본의 주요수계를 중심으로-
한미덕 ( Mi Deok Han ),이기배 ( Gi Bae Lee ) 한국환경생태학회 2008 한국환경생태학회지 Vol.22 No.4
본 연구에서는 1990~2005년 사이에 일본전국의 109개의 주요하천유역에서 조사된 어류, 식물, 조류 데이터를 이용하여, 각 생물종의 종수와 기후 및 지형의 환경인자와의 관계를 분석하고 모델링을 수행하였다. 그 결과, 어류, 식물, 조류의 분포는 각각 연평균 기온, 유역면적, 연간 강수량에 의해서 가장 많은 부분이 설명되었다. 또한, 광범위스케일에서의 환경인자데이터를 이용한 각 생물종에 대한 일반화가법모델을 이용하여 일본전국의 하천유역의 각 생물종수의 값을 예측하고 그 값을 지도화하였다. 예측값을 지도화하는 것은 관리자가 생물종의 다양성을 확보하기 위해서 보호해야할 지역을 새롭게 설정하거나, 생물다양성 보호지역의 유효성을 평가하는데 활용될 수 있다. This study analyzed and modeled the relationships between the species richness of fish, plant, and bird and environmental factors such as climatic and geographical variables based on data collected from 109 major drainage systems in Japan from 1990 until 2005. As a result, the most parts of the distributions of the fish, plant, and bird species richness were clarified by the average annual atmospheric temperature, dimension of drainage areas, and annual rainfall, respectively. In addition, this study predicted the value of each organism species distributed in national drainage areas in Japan using GAMs(Generalized Additive Models) for each organism model created by environmental factors on a wide-ranging scale, and also mapped out the value. Mapping out the predicted value could make it easier for its managers to newly set up the areas needing to be protected to obtain diversity of the organism species and to assess their availability of conservation for bio-diversity.
장기적 토지피복 분석을 통한 경안천 유역의 토지이용 특성
한미덕 ( Mi Deok Han ),김지찬 ( Ji Chan Kim ),정욱진 ( Wook Jin Chung ) 한국물환경학회 2011 한국물환경학회지 Vol.27 No.2
The use of land cover was sharply changed during 1975~2007 in the Kyungan watershed (561.12 km2). The changes occurred over an area of more than 227.65 km2 during the overall period at changing rates of 1.04% per year for water area, 1.79% per year for residential area, 2.99% per year for bare area, 3.03% per year for wetland area, 3.04% per year for grass area, 0.87% per year for forest and 2.32% per year for agriculture area. Water, residential, bare and wetland areas increased, while grass, forest and agriculture areas decreased during the last 32 years. BOD concentrations of representative sites for each sub-watershed continuously increased until the early 2000s as residential area increased with the highest discharged load, but decreased after the mid 2000s except upper Kyungan watershed. Such decline appears to be associated with the planning of Total Maximum Daily Load management for Gwangju city and expansion of waste water treatment plant. It is necessary to control land use/cover changes of the upper watershed and to prepare appropriate watershed management system for improvement in river environment including water quality, stream flow and bio-diversity.
보문 : 일본 서식 외래 담수어종의 서식확률 평가를 위한 통계기법 연구
한미덕 ( Mi Deok Han ),정욱진 ( Wook Jin Chung ) 한국하천호수학회(구 한국육수학회) 2011 생태와 환경 Vol.44 No.2
This study analyzed and modeled the relationships between the probabilities of two exotic species occurrence (i.e. largemouth bass and blue gill) and environmental factors such as climatic and geographical variables using Generalized Additive Models (GAM), Generalized Liner Models and Classification Tree Analysis (CTA). The most moderate occurrence probability of largemouth bass was predicted using GAM with an area under the curve (AUC) of 0.88 and Kappa of 0.42, while those of blue gill was suggested by using CTA with an AVC of 0.92 and Kappa of 0.44. The most significant environmental variable in terms of changes in deviance for both species was the annual air temperature for the occurrence probability. Dams had stronger effect on the occurrence of largemouth bass than blue gill. Model development and prediction for the occurrence probability of fish species and richness are necessary to prevent further spread of exotic fishes such as largemouth bass and blue gill because they can threaten habitats of native river ecosystem through various mechanisms.
진위천 수계의 수질오염총량제 시행에 따른 지역개발과 삭감계획 평가
한미덕(Mi Deok Han),안기홍(Ki Hong Ahn),류지철(Ji Chul Ryu),손지영(Jee Yong Son),박배경(Bae Kyung Park),김용석(Young Seok Kim) 大韓環境工學會 2014 대한환경공학회지 Vol.36 No.6
본 연구에서는 2012년부터 수질오염총량관리 시행계획이 시행중인 진위천 수계의 연차별 지역개발 및 삭감계획을 평가하여 최종년도 할당부하량 및 목표수질을 만족하기 위한 방향성을 제시하고자 하였다. 진위천 수계 8개 자치단체의 시행계획을 분석한 결과, 대부분의 지자체에서 삭감계획보다 개발계획의 연차별 진행률이 빠른 경향을 보였다. 군포시, 용인시, 화성시는 2020년, 평택시는 2018년, 안성시는 2015년, 오산시는 2019년이 되어서야 삭감계획 진행율이 개발계획 진행율 보다 높거나 같아졌다. 주요 삭감방법은 하수처리시설 신증설, 방류수질 개선, 축산폐수 및 고형물의 자원화, 비점저감시설 확충 등 이었으며, 특히 축산산업이 활발한 지역의 특성이 반영되어 총 삭감률 중 가장 높은 비율을 차지하는 삭감방법은 축산폐수 및고형물의 자원화로 삭감률은 34.1%에 해당되었다. 진위천 수계의 수질오염총량제가 성공적으로 정착하기 위해서는 삭감계획및 지역개발계획의 체계적인 관리를 포함하여 기초자치단체의 적극적인 의지가 무엇보다 중요할 것으로 판단된다. The development and reduction scheme under implementation plan of TMDLs were performed in the Jinwi watershedincluding 8 cities (Gunpo, Yongin, Suwon, Anseong, Osan, Uiwang, Pyeongtaek and Hwaseong) since 2012. Progress of the annualdevelopment schemes was faster than the reduction schemes in most of the cities during the planning period. Main load reductionmethods included establishment and enlargement of sewage treatment plants, resources of livestock excretions, and introduction ofbest management practices of non-point source pollution. Especially, reduction load using recycling and composting of livestockexcretions comprised 34.1% of all reduction load. It is necessary to implement methodical development and reduction scheme formaking of successful performance of TMDLs and water quality improvement in the Jinwi watershed.