• 생태와환경
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• 제55권4호
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• pp.320-329
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• 2022

Urban areas in watersheds increase the impervious surface, and agricultural areas deteriorate the water quality of rivers due to the use of fertilizers. As such, anthropogenic land use affects the type, intensity and quantity of land use and is closely related to the amount of substances and nutrients discharged to nearby streams. Riparian vegetation reduce the concentration of pollutants entering the watershed and mitigate the negative impacts of land use on rivers. This study analyzes the data through correlation analysis and regression analysis through point data measured twice a year in spring and autumn in 21 selected damaged tributary rivers within the Han River area, and then uses a structural equation model to determine the area land use. In the negative impact on water quality, the mitigation effect of riparian vegetation was estimated. As a result of the correlation analysis, the correlation between the agricultural area and water quality was stronger than that of the urban area, and the area ratio of riparian vegetation showed a negative correlation with water quality. As a result of the regression analysis, it was found that agricultural areas had a negative effect on water quality in all models, but the results were not statistically significant in the case of urban areas. As a result of the model estimated through the structural equation, BOD, COD, TN, and TP showed a mitigation effect due to the accumulation effect of river water quality through riparian vegetation in agricultural areas, but the effect of riparian vegetation through riparian vegetation was found in urban areas. There was no These results were interpreted as having a fairly low distribution rate in urban areas, and in the case of the study area, there was no impact due to riparian forests due to the form of scattered and distributed settlements rather than high-density urbanized areas. The results of this study were judged to be unreasonable to generalize by analyzing the rivers where most of the agricultural areas are distributed, and a follow-up to establish a structural equation model by expanding the watershed variables in urban areas and encompassing the variables of various factors affecting water quality research is required.

• 한국자원식물학회지
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• 제25권4호
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• pp.447-455
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• 2012

The phytosociological study was carried out to investigate the Corylopsis gotoana var. coreana community structural characteristics and soil environment of Mt. Baegun in Pochen. The vegetation data of total 9 relev$\acute{e}$s were analyzed by the Z$\ddot{u}$rich-Montpellier school's method. Three communities of Mt. Baegun were recognized : Corylopsis gotoana var. coreana - Quercus mongolica community, Corylopsis gotoana var. coreana - Carpinus laxiflora community, Corylopsis gotoana var. coreana typical community. The reanalysis to Corylopsis gotoana var. coreana community structural characteristics in south area classified 8 communities by literature. PCA analysis of Corylopsis gotoana var. coreana community distributed in the middle and southern area showed that the Corylopsis gotoana var. coreana community of the Mt. Jiri in the southern area was highly correlated with the one of Mt. Baegun in the middle area.

• The Korean Journal of Ecology
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• 제17권4호
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• pp.471-484
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• 1994

The forest vegetation types and their structural characteristics in Mt. $Mud\v{u}ng$ were investigated by classification method and ordination method. The forest was classified into 7 communities by ristic composition table: Quercus monogolica community, Q. serrata community, Q.acutissima community, Q.variabilis community, Q.dentata community, Pinus densiflora community and Frainus mandshurica community. Considering the moisture gradient, two kinds of distributuin pattern were shown as follows; F. mandshurica, Q. acturissima, Platycarya strobilacea and Staphylea bumalda were distribute at moist habitats, while Q. monogolica, P. densiflora and Q.variabilis at dry habitats. In continuum analysis, each population occupied different distribution area but it was continuously overlapped. On the successional trends of tree species, it is postulated that Q. mongolica species might dominate the altitudinal zone over 700m.

• 한국물환경학회지
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• 제30권6호
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• pp.638-646
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• 2014

Soil erosion from agricultural fields leads to various environmental problems weakening the capabilities of flood control and ecosystem in water bodies. Regarding these problems, Ministry of Environment of South-Korea prepared various structural and non-structural best management practices (BMPs) to control soil erosion. However, a lot of efforts are required to monitor and develop BMPs. Thus, modeling techniques have been developed and utilized for these issues. This study estimated the effectiveness of BMPs which are a vegetation mat with infiltration roll and Roll type vegetation channel using Soil and Water Assessment Tool (SWAT) model through the adjustment of the conservation practice factors, P factors, for Universal Soil Loss Equation which were calculated by monitoring data collected at the segment plots. Each BMP was applied to the areas with slopes ranged from 7% to 13% in the Haeanmyeon watershed. As a result of simulation, the vegetation mat with infiltration roll and Roll type vegetation channel showed 55% and 59% efficiency of soil erosion reduction, respectively. Also, Vegetation mat with infiltration roll and Roll type vegetation channel showed each 11.2% and 11.8% efficiency in reduction of sediment discharge. These roll type vegetation channel showed greater efficiency of soil erosion reduction and sediment discharge. Based on these results, if roll type vegetation channel is widely used in agricultural fields, reduction of soil erosion and sediment discharge of greater efficiency would be expected.

• 한국환경복원기술학회지
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• 제12권5호
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• pp.121-132
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• 2009

The agency which is responsible for work related to the restoration of vegetation on the quarry in Hong Kong is the Geotechnical Engineering Office of Civil Engineering and Development Department (CEDD). CEDD's environmental management system was certified as ISO 14001 : 2004 in 2006 and diverse instructions and technical documents about the restoration of the quarry were published and used for the performance of work and the implementation of the project. The restoration of the quarry is being carried out to respond to short-term and long-term goals. The general instructions for the restoration of vegetation says that a plant, when selected, should be self-sustainable with minimum maintenance required, have a high growth and survival rate, be tall enough to cover the rock slope faces, and preferably produce colourful flowers. These instructions prescribe the vegetation introduction technology, planting seasons, structural material of the vegetation works, maintenance and management, tree nursery operation, means of water supply, etc. This report introduced the outline of work on restoring vegetation carried out at Anderson Road, Shek O, Lam Tei, Turret Hill, Lamma, all large-sized quarries. In addition, it additzed Anderson Road's master plan. It is hoped that the Hong Kong examples so introduced are referred to in terms of institutional and technical considerations related to the nation's project for restoring quarries.

• 한국환경복원기술학회지
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• 제18권3호
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• pp.65-77
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• 2015

The urban park has important functions as a habitat for wildlife as well as open space of rest and community for people. This study was carried out to find what factors of structure and vegetation of urban parks could affect forest bird species diversity in Cheonan city. The study surveyed bird and vegetation species in 26 urban parks, Cheonan city. A correlation analysis and multiple linear regressions were performed to test whether habitat structure and vegetation were the major correlate with species diversity. The results showed the Dujeong park was the most high bird species diversity (H' = 2.13), and the Dujeong-8 park (H' = 2.02) and the Cheongsa park (H' = 1.73) were considerably higher than the other urban parks. The variables that were strongly correlated with bird species diversity were park area, number of subtree species, canopy of shrub, number of shrub species, shape index, canopy of subtree, canopy of tree, and impervious surface ratio. The regression of bird species diversity against the environmental variables showed that 3 variables of park area, canopy of subtree, and canopy of tree were included in the best model. Model variable selection was broadly similar for the 5 optimal models. It means park area and multi-layer vegetation were the most consistent and significant predictor of bird species diversity, because urban parks were isolated by built-up areas. Especially the subtree coverage that provides shelter and food for forest birds was an important variable. Therefore, to make parks circular-shaped and abundant multi-layer vegetation, which could be a buffer to external disturbances and improve the quality of habitats, may be used to enhance species diversity in creation and management of urban parks.

• 한국산림과학회지
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• 제110권4호
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• pp.516-529
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• 2021

백두대간 보호지역 침엽수림은 기후변화, 식생천이, 인간간섭 등 다양한 교란 요인으로 토지 본래의 식생 조성과 구조의 변화가 커서 생태적 안정성과 더불어 경관적 다양성과 특이성이 점차 저하되고 있다. 본 연구는 백두대간 보호지역 침엽수림의 전면적이고 종합적인 보전 방안 수립의 기초자료를 제공할 목적으로 2016년에서 2020년까지 5년간 수행된 산림청 백두대간 자원실태변화조사에서 수집된 총 755개 임분의 식생정보를 바탕으로 정량적인 ZM학파의 식물사회학적 방법과 정량적인 이원지표종분석 방법(TWINSPAN)을 병용하여 종조성적 식생유형을 구분하고 그 종다양성과 구조적 특성을 파악하였다. 그 결과, 백두대간 보호지역 침엽수림의 식생유형은 2개 군락군, 4개 군락, 7개 아군락, 그리고 14개 변군락의 식생단위 체계 하에 총 15개 유형으로 구분되었다. 또한, 침엽수림 구성종의 100 m²당 평균 총피도와 출현종수는 각각 232%, 21종 그리고 종다양도와 종우점도 지수는 각각 평균 1.907, 0.222로 나타났다.

• 환경생물
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• 제34권1호
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• pp.41-47
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• 2016

우리나라에 발생하는 해안 식생의 식생 구조에 대하여 식물사회학적 연구를 수행하였다. 총 102개 조사구에 대한 식생자료의 분석은 ZM 학파의 방법을 활용하였다. 국내 해안에 발생하는 식물 군집 구분은 총 11개의 군락으로 순비기나무-돌가시나무 군락, 갯메꽃 군락, 통보리사초-갯그령 군락, 갯잔디 군락, 해홍나물 군락, 방석나물 군락, 나문재-가는갯는쟁이군락, 칠면초 군락, 천일사초 군락, 갈대 군락, 산조풀 군락이 구분되었다. 각 군락 들은 발생지역과 환경에서 다양성을 보였다. 식생 자료에 대한 주성분분석 (PCA) 결과 식물사회학적 군락 분류 결과를 지지하였다.

• 한국환경생태학회지
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• 제36권5호
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• pp.507-524
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• 2022

우리나라 난온대 도서지역을 광범위하게 조사해 TWINSPAN분석을 통해 식생을 유형화한 후에 유형별 입지환경과 군집구조 특성을 밝혔다. 이를 바탕으로 식생유형별 복원전략을 도출하여 난온대림 복원계획의 방향성을 제시하고자 했다. 식생유형은 명료하게 8개로 나뉘었는데 군락 I~IV는 후박나무, 구실잣밤나무 등이 우점한 양호한 상록활엽수림 이었다. 반면, 군락 V~VIII은 곰솔림과 낙엽활엽수림, 인공조림지로 난온대 지역의 퇴행천이 식생이었다. DCA분석 결과로 도출된 환경요인은 해발고(최한월 평균기온)와 해안선에서 거리(내염성)였다. 2가지 환경요인에 따라 후박나무림, 구실잣밤나무림, 가시나무류림 유형으로 난온대림 분포패턴이 명료해졌다. 3가지 식생유형을 복원대상지의 입지환경을 고려해 복원목표 식생으로 적용하는 것이 합리적이다. 군락 V~VIII에는 곰솔, 낙엽활엽수 등이 수관층을 형성했는데 종자 확장력이 강한 상록활엽수종이 하층에 빈번하게 출현해, 상록활엽수림으로 식생천이 가능성이 컸다. 도서지역에 산림이 사라진 황폐지는 협소하지만, 곰솔림과 낙엽활엽수림 등의 퇴행천이된 식생이 대면적을 이룬다. 이곳을 상록활엽수림으로 갱신하는 복원전략이 탄소중립 실현과 생물다양성 증진 측면에서 효과성이 더 클 수 있다.

• 한국구조물진단유지관리공학회 논문집
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• 제7권1호
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• pp.207-215
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• 2003

Developed is a new environment-friendly concrete-block retaining wall system. The conventional analysis methods are not directly applicable because the proposed concrete-block wall system is made of by interlocking the blocks with shear keys. Therefore, the shear analysis as well as stability analysis have been conducted to secure the safety of block-wall system. Overall slope stability analysis was also performed. An appropriate strengthening method was developed to ensure the safety when the block-wall system is relatively high. The method of analysis for strengthening the concrete-block wall system was also proposed. The proposed environment-friendly concrete block retaining wall system shows reasonable safety and can be a good construction method for retaining walls and river bank walls.