• 환경영향평가
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• 제8권3호
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• pp.77-90
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• 1999

The degree of green naturality (DGN) has played a key role for maintaining the environmental quality from inappropriate developments, although the quality and effectiveness of the mapping of DGN has been under debate. In this study, spatial distribution of degree of green naturality was initially estimated from forest stand maps that were produced from the aerial photo interpretation and extensive field survey. Once the boundary of initial classes of DGN were defined, it were overlaid with normalized difference vegetation index (NDVI) data that were derived from the recently obtained Landsat Thematic Mapper data. NDVI was calculated for each pixel from the radiometrically corrected satellite image. There were no significant differences in mean values of vegetation index among the initial DGN classes. However, the satellite derived vegetation index was very effective to delineate the developed and damaged forest lands and to adjust the initial value of DGN according to the distribution of NDVI within each class.

• 환경영향평가
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• 제6권2호
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• pp.181-188
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• 1997

Vegetation is an important factor in EIA(Environmental Impact Assessment) and it is assessed according to DGN(Degree of Green Naturality) in EIS(Environmental Impact Statement) preparation. But DGN has room for improvement of assessing vegetation Status. This study introduced NDVI(Normalized Difference Vegetation Index) for improving status assessment method that subjects to DGN. For the application of NDVI, Landsat TM data of Chunchon on May 2, 1989 and June 1, 1994, and data of Ulsan on November 5, 1984, November 2, 1992 and May 9, 1994 were used. It compared NDVI with DGN according to season and location. The correlation coefficient value for the spring image (1994, 0.7, p=0.01) was proved to be higher than that of autumn (1984, 0.5, p=0.01).

• 한국산림과학회지
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• 제64권1호
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• pp.64-73
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• 1984

인간(人間)의 활동(活動)이 자연환경(自然環境)의 자연성(自然性) 보존(保存)에 미친 영향을 파악하여 자연보존정책(自然保存政策)의 기본방향(基本方向) 설정(設定)에 기초 자료로 활용(活用)코자 녹지자연도(綠地自然度) 조사(調査)를 실시(實施)하였다. 녹지자연도(綠地自然度) 조사(調査)에 관한 기존(旣存)의 조정기준(調定基準)에 따라서 1983년(年) 하계(夏季)에 우리나라의 중심지방(中部地方)인 공주(公州) 및 연기지역(燕岐地域)에 대하여 조사(調査)한 결과(結果), 그 평균치(平均値)는 약 5.1~5.9로 비교적 높은 값을 보이며, 특히 DGN 7등급지(等級地)의 점유비(占有比)가 높았다. 이 연구(硏究)를 통하여 기존의 녹지자연도(綠地自然度) 조정기준(調定基準)을 중부지방(中部地方)에 적용함에는 다소의 문제점(問題點)이 있으므로 이에 대한 재검토(再檢討)가 요망(要望)되며, 또 조사방법(調査方法)에 있어서도 많은 개선점(改善點)이 검토(檢討)되었다.

• 환경영향평가
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• 제6권1호
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• pp.47-54
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• 1997

Vegetation Index(VI) derived from remote sensing data is used to assess ecosystem factor in Environmental Impact Assessment(EIA) process. Ecosystem factor has been prepared by Degree of Green Naturality(DGN) mainly in Environmental Impact Statements. But DGN has room for improvement of assessing actual ecosystem situation. The objectives of this study are to define the relationship between field measure DGN and VI, and to develop methodologies to use VI for assessing the status and conditions of natural ecosystem. For verification of DGN and VI, 35 sites using global positioning system are selected and reviewed. Correlation coefficients of DGN and VI shows highly as 0.69. Also VI in EIA found it can be applied to assess ecosystem. It concluded that VI as well as DGN can be applied to assess ecosystem newly and largescale.

• 환경영향평가
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• 제11권3호
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• pp.129-143
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• 2002

This study was executed environmental assessment to determine whether or not the national landuse planning change on the reserved area for a rope way in the ice valley(Eoreurngol) of Miryang. The selected survery area is $1,633,442m^2$ and assessed with flora, actual vegetation, degree of green naturality(DGN), sere stage and wild birds. The flora was summarized as 132 taxa which is 90 genera, 117 species, 12 varieties and 3 forms. The actual vegetation was classified 24 types and nature forests like Quercus and deciduous-broad leaf community was distrubuted broadly. Especially Quercus and deciduous-broadleaf communities were assessed high rarity value in Miryang. From the analysis of DGN, it were found out that DGN 8 is 72.5% and DGN 9 is 3.9%. At the analysis of sere stage, the communities were divided 4 with Quercus mongolica, Pinus densiflora, Carpinus laxiflora and deciduous-broadleaf community. Wildbirds was observated as 30 species and 161 ea and Aix galericulata (natural monument no. 327) especially inhabited there. From the above nature ecosystem assessment, the survey area has high quality naturalness, so it was turned out that a rope way construction might be not suitable in survery area.

• 한국환경생태학회지
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• 제18권2호
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• pp.167-174
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• 2004

백두대간 구간 중 남덕유산에서 소사고개까지의 현존식생과 녹지자연도를 2003년에 조사하였다. 조사구간의 현존식생은 총 14개의 식물군락과 기타 지역으로 구분되었으며, 신갈나무군락, 침활혼효림, 낙엽활엽수군락, 소나무군락 등 자연림은 9개 군락으로, 일본잎갈나무림, 리기다소나무림 등 인공림은 4개의 유형으로 구분되었다. 조사구간의 녹지자연도는 9등급 지역이 약 57.98%로 가장 넓게 분포하였고, 8등급 지역이 약 26.77%로 나타났다. 백두대간 상 녹지자연도 1,2등급은 5.18%로 덕유산국립공원 이외지역의 소사고개와 신풍령 주변 등지에서 많이 나타났다.

• 한국환경생태학회지
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• 제17권2호
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• pp.153-168
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• 2003

최근 개발압력이 가중되고 있는 울진군 왕피천을 대상으로 하천 주변폭 약 1km씩을 대상으로 현존식생도, 녹지자연도, 식생구조 등 산림생태계 조사를 실시하였다. 현존식생도 분석결과 식생유형은 총 26개로 구분되었으며, 그 중 소나무가 우점하는 군락이 6개 유형으로 가장 많이 나타났다. 녹지자연도의 경우 등급 8지역이 전체 조사면적의 70.8%를 차지하였으며. 등급 9지역은 0.3%로 나타났다. 식물군락의 분류는 classification 기법 중 TWINSPAN을 이용한 결과 총 5개군락, 소나무군락(I), 소나무군락(II), 소나무군락(III), 신갈나무군락(IV), 굴참나무군락(V)으로 구분되었다. 각 군락별로 상대우점치를 이용하여 식생구조를 파악하였고, 그 밖에 종수 및 개체수분석 흉고직경급별 분석, 유사도지수 분석을 실시하였다.

• 환경영향평가
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• 제15권5호
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• pp.339-355
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• 2006

In this paper, we reviewed the assessment criteria and conservation value used to evaluate vegetation. The Degree of Green Naturality (DGN) and the Grade of Vegetation Conservation (GVC) are both sets of criteria that estimate the degree of human disturbance or natural value of vegetation. The criteria are extensively used in decision-making about the natural environment conservation and environment impact assessment. Sometimes, social issues can rise because the criteria are not clear. This study aims to evaluate the criteria based on the many aspects of the related literatures and suggest reasonable revised criteria. In addition, criteria for representing the relative value of valuable vegetation conservation are suggested. The DGN and GVC are essentially same; both have 11 degrees and 5 grades. While the DGN is subdivided into levels of anthropogenic disturbances, the GVC indicates the priority for conserving valuable vegetation. Therefore, the DGN is very useful for assessing land development projects, etc., while the GVC is needed to delineate the Ecological Assessment Map(EAM). In conclusion, it is desirable that both criteria should be used together appropriately.

• 한국환경생태학회지
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• 제25권2호
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• pp.166-174
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• 2011

2010년에 내장산국립공원의 현존식생 및 녹지자연도를 조사하였다. 내장산국립공원의 현존식생은 총 12개 식물군락과 기타지역으로 구분되었으며, 2차림인 자연림은 소나무군락, 낙엽활엽수군락, 신갈나무군락 등 8개 식생군락으로, 조림지는 리기다소나무-소나무림, 일본잎갈나무림 등 4개 수림으로 구분되었다. 내장산국립공원의 녹지자연도 8등급 지역이 약 60.58%, 녹지자연도 9등급 지역은 3.62%로 나타났다. 내장산국립공원의 자연경관과 생물다양성 회복을 위하여 조림수종 제거 등 외래종에 대한 관리가 필요하다.

• 한국환경복원기술학회지
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• 제15권2호
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• pp.31-40
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• 2012

The Environmental Conservation Value Assessment Map (ECVAM) is a five grade assessment map created with nationally integrated environmental information and environmental values. The map is made through the evaluation of 65 items, including greenbelt area and naturalness. Naturalness means original state of nature, and it is one of the most important evaluation items for conserving nature. The criteria of naturalness includes the Degree of Green Naturality (DGN) made by MOE. Using the data which has been not updated is a problem of accuracy for ECVAM. Therefore, this study would like to improve the criteria of naturalness. To improve the criteria, the study examined the effectiveness of DGN using field survey. The results of analysis the naturalness without DGN, some area changed grade of naturalness have been already damaged or cleared for agriculture and industrial purposes. The grade of naturalness should be included the concept of vegetation transition like DGN. The study suggested a improved method using vegetation type (natural and planted forest), forest age, and the grade of vegetation conservation. The method was reviewed by experts and field survey. After applying the method in South Korea, the grade of naturalness were distributed evenly like GradeI is 38.87%, GradeII is 37.62%, GradeIII is 23.51%, respectively. From the results of field survey, over 4 grade of forest age in natural forest showed similar pattern of structure and composition in original forests. Therefore, the improved criteria explained the naturalness better than existing criteria, and the accuracy of ECVAM has been improved more.