• 한국습지학회지
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• 제16권4호
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• pp.327-333
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• 2014

하천 생태 기능 증대 등 하천복원을 위한 식생 조성 시 내침수성이 강한 식물을 도입해야 하며 이를 위해 침수기간에 따른 하천식물의 생육특성 연구가 반드시 필요하다. 따라서 본 연구에서는 버드나무속 식물을 대상으로 식물키, 엽수, 녹색정도, 건중량 등을 측정하여 내침수성 및 침수기간에 따른 성장률을 분석하였으며 탁수에 의한 침수실험 결과와 비교하였다. 실험 결과 갯버들, 버드나무, 왕버들 중 내침수성이 가장 강한 식물은 버드나무이며 정수 상태의 침수는 고탁수 침수보다 고사 가능성이 매우 낮았다. 또한 버드나무속 식물은 20일 이하의 침수 시 비침수 조건보다 식물의 생장에 도움을 주는 것으로 나타났다.

• 한국환경복원기술학회지
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• 제10권6호
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• pp.70-80
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• 2007

This study was surveyed from January to september, 2007 in order to evaluate the function of coastal wetland as a ecological axis in korea peninsula. Assessment was done by RAM (Rapid Assessment Method). RAM is consisted of total 8 contents and divided into high, moderate, low. The preservation grade of RAM is divided into 4 grades; absolute preservation, preservation, improvement and improvement or restoration. Throughout survey on total 14 wetlands of marine, estuary wetland and back marsh which are distributed in west coast in chung-nam province, their function was assessed. As result, total all the 14 wetlands were judged as preservation grade by assessment of 8 functional contents. The function of wetlands assessed as preservation grade showed high in water quality protection and improvement. Also, showed high in vegetation diversity, wildlife habitat and aesthetic recreation. Meanwhile, showed low in ground water recharge, Shoreline/Stream Bank Protection, Flood/Stormwater storage and Flood flow alteration. Of wetlands evaluated as preservation grade, Dae-ho, Sinduri, Bu-Nam lake, Sowhang dune and keum river estuary were assessed as absolute preservative area owing to habitation of international protection species and endangered species. These wetlands are essential to be managed continuously as a area having high ecological value. Farther, this wetlands will be done as a axis of ecological network related to land ecosystem.

• 한국동물위생학회지
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• 제35권3호
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• pp.183-189
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• 2012

Tsutsugamushi disease or scrub typhus cause by Orientia tsutsugamushi is an endemic disease in Korea. Chigger mites and field rodents play roles in transmission of the disease by the vector and host of the agent. The purpose of this study is to investigate the density of the chigger mites and field rodents due to environmental factors such as temperature, relative humidity, soil thickness and the various vegetations to the 9 field rodent collection sites. The total 62 field rodents was captured by the Sherman collapsible traps from April to October 2009 at the Jangseong of Jeonnam Province, Korea. The trapping rate of the field rodents by the different collecting sites was dominant at subside storage water (24%), bush near by dam (22%), bank around field (20%), followed by 18% of grassy field and surround cattle shed. The distribution of chigger mites by the different collecting sites was the highest at Bush near by dam (28.7%). And the sites of subside storage water, bank around field and surround cattle shed were 20.4%, 18.8%, 16.4%, respectively. On the other hand the collecting sites of stream bank and ridges between rice paddies were not collected. The temperature to the collecting sites was showed $24.1^{\circ}C$ in June and $24.2^{\circ}C$ in October which was higher than April ($10.6^{\circ}C$), whereas lower than May ($25.3^{\circ}C$) and September ($26.8^{\circ}C$). The highest number of mites was collected at $24.2^{\circ}C$ and 46.6% relative humidity in October. The chigger mites and field rodents were highly collected between 18 and 24% at the sites where are loosely in the superficial layers of the soil from 8.0 cm to 10.2 cm. Total 25 species of vegetation were distributed at the collecting sites. In the present study, strong evidence was found that bank around field and grassy field were provided for the prevalence sites of tsutsugamushi disease.

• 환경영향평가
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• 제20권3호
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• pp.381-395
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• 2011

Present work aims to establish an integrated management system of environmental data base for nine typical wind holes or air holes in Korea. It basically deals with definition, geographical distribution, morphological pattern, physical characteristics and anthropogenic environments of wind hole to propose systematic preservation strategy of their periglacial landscape and flora, which are known to be sensitive to global warming. Wind hole, in which cool air blows out during the summer, but mild air comes out during the winter from a cave or hole, is frequently found on northwest- and north-facing slopes on the terminal point of steep talus, block field, and block stream, and can be categorized into three types, i.e., talus, cave and sink types. Environmental characteristics of nine wind holes are analyzed on the basis of their geology, landform, climate, soil, hydrology, vegetation, road, footpath, land-use, and management system, and relevant DB are prepared. Wind hole areas with unique landscape and ecological values need to be designated as a nature reserve, and zoning of core, buffer, and transitional zones are required for the multi-dimensional preservation of periglacial landscape and ecosystem. Phytogeographical values of glacial relict plants, including mountain cranberry(Vaccinium vitis-idaea) at its global southernmost limit at Bangnaeri wind hole, Hongchon County, Gangwon Province of Korea are discussed in detail as a floristic refugia in connection with climate change during the Pleistocene Epoch and potential in-situ and ex-situ preservation sites in the future.

• 한국환경복원기술학회지
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• 제17권1호
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• pp.65-79
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• 2014

This study selected Nakdong River basin zone in Daegu as an example area to conduct landscapetope classification and aesthetic value assessment of landscape according to the classified landscapetope. The main result of this research can be summed up as following. First, the result of landscapetope type classification showed 28 types of landscapetope including complex residential area (AA), natural stream type with copious vegetation (BA), forest type centered on mixed forest of soft and hardwood (EB) along with 129 types of imputed specific landscapetope. The result of the total first assessment using B-VAT showed the first grade 10 types, II grade 4 types, III grade6 types, IV grade 3 types, 5 types for V grade with the lowest value. The second assessment conducted toward the landscapetope types with the grade higher than the average (including III grade) in the result of the first assessment showed that there are 66 spaces for the sites (1a, 1b) with special meaning for aesthetic landscape evaluation. And also, there were 69 spaces for those (2a, 2b, 2c) with meaning for aesthetic landscape evaluation. The design model of this research is largely divided into improvement goal and specific execution plan. First, the improvement goal is divided into 6 categories including conservation area, complementary area, and restoration area, and the specific execution plan is divided into 14 categories including special landscape management area, general landscape management area, conservation of hill areas with optically good condition. A comprehensive master plan was suggested by directly applying the set landscape planning model to the subject place of this research.

• 한국약용작물학회지
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• 제20권6호
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• pp.421-433
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• 2012

This study was carried out to survey the vascular plants in 6 regions including around Hopo-Bridge of Yangsan region at waterfronts of Nakdong river, Korea. Distributed plants were surveyed from April to November, 2011. The vascular plants in 6 regions (around Mulgeum-chuisujang, Mulgeum-station, Jeungsan-ri, Hopo-bridge, Kumoh-bridge and lower part of Yangsan-stream) were total 135 taxa of 3 divisions, 4 classes, 37 orders, 66 families, 116 genera, 114 species, 2 subspecies and 19 varieties. The most number of species is Campanulales of 14.1% in Dicotyledoneae of 81.5% among total species. Regional distribution of species is mainly around Mulgeum-chuisujang and Jeungsan-ri as 61% among total species, and other regions is in 24 ~ 44%. Ecologically, there were herbaceous plants 75% and woody plants 25%, and 9 species of aquatic plants in herbaceous plants. Medicinal (herbal) plants included in KP (The Korean Pharmacopoeia) and KHP (The Korean Herbal Pharmacopoeia) were 56 species including Platycodon grandiflorum (Jacq.) A. De Candolle, Peucedanum japonicum Thunberg and etc., and folk herb plants were 14 species including Metaplexis japonica Makino, Commelina communis Linn$\acute{e}$ and etc. among total 135 species.

• 한국습지학회지
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• 제15권3호
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• pp.397-406
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• 2013

습지보전계획을 수립하는데 있어 식생의 온전성, 멸종위기종 출현여부 등 대상지역 위주의 습지평가방법에서 점차 주변지역이나 광역적인 위상관계, 연결성을 고려한 경관생태학적 접근방법에 의한 습지평가 필요성이 제기되고 있다. 이에 본 연구에서는 낙동강 유역에 분포하는 407개 습지를 대상으로 경관생태학적 접근방법과 그래프이론에 의해 습지생태네트워크 구축모형을 제시하였다. 습지의 물질순환, 철새이동루트 등 현지조사 자료가 부족한 낙동강 유역의 네트워크 분석에는 평면네트워크 그래프 모델을 적용하였으며, 연결성 분석은 임계거리를 15km로 설정하여 습지군집 5개와 핵심습지 4개를 도출하였다. 이진모형과 확률모형에 의한 통합연결성지수와 연결가능성지수를 계산한 결과, 5개 습지군집 및 핵심습지와 취약습지를 검증할 수 있었으며, 낙동강본류와 금호강지류에 위치한 습지군집이 습지생태네트워크에 있어 중요한 역할을 담당하고 있다. 본 연구를 통해 얻은 낙동강 유역의 습지군집과 네트워크, 취약습지 분포특성은 유역 단위의 습지보전 관리계획 수립, 습지복원사업을 실시하는데 기초자료로 활용할 수 있다.

• 대한원격탐사학회지
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• 제11권2호
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• pp.1-16
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• 1995

본 연구에서는 GIS(Geographic Information System) 기법을 수자원모델링 분야에 적용 시키고자 하였다. 강우에 따른 정확한 유출량의 예측은 수자원의 개발이나 관리분야에 있어서 매 우 주요하므로 지금까지 다양한 강우-유출 모형들이 개발되어 왔으며, 이 중 지형적인 특성인자 를 최대한 고려한 분산형 모형은 기존의 모형인 집중형 모형의 단점을 보완할 수 있다는 점에서 그 효용이 인정되어 왔다. 그러나 대유역에 적용할 경우에는 방대한 량의 공간자료를 처리하여야 하므로, 현실적으로 적용하기가 어려웠다. 본 연구에서는 우리의 지형에 맞는 분성형 강우-유출 모형을 개발하였으며, GIS 기법을 활용하 여 입력 자료를 생성, 입력 조작하고 이들을 병합시켜 사용자들이 보다 용이하게 사용할수 있도 록 통합된 시스템을 개발하고자 하였다. 이러한 시스템의 개발에는 실시간(on-line) 운영과 off-line 보정기능을 고려하여야 한다. 본 연구에서는 일차로 데이타베이스, 모형, GIS 그리고 그 래픽 사용자 인터페이스의 기능을 병합시켜 신속한 최종결과는 도출시키는 on-line 운용을 할 수 있는 시스템을 개발하고자 하였다. 소양강 댐 유역의 1990년 9월 홍수를 대상으로 하여 댐 지점 의 유입 수문 곡선을 모의한 결과 사후 모형 보정단계를 거치지 않았음데도 불구하고 관측된 자 료와 비교적 잘 일치하여 실무에의 활용 가능성을 보여주었다.

• 한국환경복원기술학회지
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• 제24권1호
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• pp.37-51
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• 2021

The purpose of this research is to develop the Habitat Suitability Index (HSI) for habitat environments of Aix galericulata (A. galericulata) and Dendrocopos major (D. major), which tend to inhabit urban environments. A. galericulata and D. major are the keystone species representing the ecosystem of wetlands and forests. Based on the analysis of their urban habitat environments, this study selects artificially adjustable levels of the environmental index in order to produce the HSI model, which can be used when either restoring or creating the urban habitats for these species. To develop the HSI, we conducted field surveys at Jungnangcheon Stream, Changgyeonggung, Jangneung, Bangbae Neighborhood Park, Gildong Ecological Park, and Seodalsan Mountain. These surveys were conducted between April and August 2020, and this period includes the breeding season of both A. galericulata and D. major. Based on our findings from the surveys, we conclude that there are six SI factors for A. galericulata. These include (1) the presence of alluvial islands, (2) waterfront vegetation cover rate, (3) type of aquatic plants for food, (4) size of forest patch, (5) type of trees in nearby forests, and (6) connectivity of waterfront and forest. We also conclude that there are five SI factors for D. major, which include (1) size of forest patch, (2) rate of broadleaf trees in forest patches, (3) type of nesting trees, (4) diameter at breast height (DBH) of nesting trees, and (5) density of dead trees. The result of this research can provide future studies with useful guidance when both (1) comparing the habitat suitability of the target species in different environments and (2) restoring or creating habitats for these species.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2023년도 학술발표회
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• pp.164-164
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• 2023

This study investigates the importance of flood-influencing factors on the accuracy of flood risk mapping using the integration of remote sensing-based and machine learning techniques. Here, the Extreme Gradient Boosting (XGBoost) and Random Forest (RF) algorithms integrated with GIS-based techniques were considered to develop and generate flood risk maps. For the study area of NAPA County in the United States, rainfall data from the 12 stations, Sentinel-1 SAR, and Sentinel-2 optical images were applied to extract 13 flood-influencing factors including altitude, aspect, slope, topographic wetness index, normalized difference vegetation index, stream power index, sediment transport index, land use/land cover, terrain roughness index, distance from the river, soil, rainfall, and geology. These 13 raster maps were used as input data for the XGBoost and RF algorithms for modeling flood-prone areas using ArcGIS, Python, and R. As results, it indicates that XGBoost showed better performance than RF in modeling flood-prone areas with an ROC of 97.45%, Kappa of 93.65%, and accuracy score of 96.83% compared to RF's 82.21%, 70.54%, and 88%, respectively. In conclusion, XGBoost is more efficient than RF for flood risk mapping and can be potentially utilized for flood mitigation strategies. It should be noted that all flood influencing factors had a positive effect, but altitude, slope, and rainfall were the most influential features in modeling flood risk maps using XGBoost.