• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.50-52
• /
• 2003

The purpose of this study is to evaluate the hydrological impact due to temporal land cover changes by gradual urbanization of a watershed. WMS HEC-1 was adopted, and DEM with 200m resolution and hydrologic soil group from 1:50,000 soil map were prepared. Land covers of 1986, 1990, 1994 and 1999 Landsat TM images were classified by maximum likelihood method. By applying the model, watershed average CN value was affected in the order of paddy, forest and urban/residential, respectively.

• International journal of advanced smart convergence
• /
• 제10권1호
• /
• pp.216-224
• /
• 2021

Aim of this research was to classify forest types at Wando in Jeonnam Province and develop warm temperate forest management system with application of Remote Sensing and GIS. Another emphasis was given to the analysis of satellite images to compare forest type changes over 10 year periods from 2009 to 2019. We have accomplished this study by using ArcGIS Pro and ENVI. For this research, Landsat satellite images were obtained by means of terrestrial, airborne and satellite imagery. Based on the field survey data, all land uses and forest types were divided into 5 forest classes; Evergreen broad-leaved forest, Evergreen Coniferous forest, Deciduous broad-leaved forest, Mixed fores, and others. Supervised classification was carried out with a random forest classifier based on manually collected training polygons in ROI. Accuracy assessment of the different forest types and land-cover classifications was calculated based on the reference polygons. Comparison of forest changes over 10 year periods resulted in different vegetation biomass volumes, producing the loss of deciduous forests in 2019 probably due to the expansion of residential areas and rapid deforestation.

• 한국산림과학회지
• /
• 제104권3호
• /
• pp.352-359
• /
• 2015

본 연구는 훼손지에 적용된 국립공원 특별보호구 제도가 탐방로의 토양과 식생에 미치는 효과를 확인하기 위해 실시되었다. 북한산 국립공원 내 일반 탐방로(개방 탐방로)와 특별보호구로 지정되어 16년 동안 출입이 금지된 탐방로(폐쇄 탐방로)의 토양의 용적밀도, 수분, 총 질소, pH, 유기물 함량을 측정하고, 지면피도를 조사하여 개방 탐방로와 폐쇄탐방로의 토양 및 식생상태를 비교분석하였다. 일반 탐방로의 토양은 탐방로 주변 식생지대의 토양에 비하여 용적밀도가 증가하고 수분과 총 질소, 유기물 함량이 감소하여 훼손을 확인하였으나, 폐쇄 탐방로의 경우, 토양의 용적밀도, 수분, 총 질소, pH, 유기물 함량이 주변 식생지대와 유의한 차이가 나타나지 않아 탐방로 폐쇄로 인한 생태적 회복을 확인하였다. 지면피도의 경우, 일반 탐방로에서 지면식생과 낙엽의 피도가 낮고 나지와 암석의 피도가 높아 훼손을 확인하였으나, 폐쇄 탐방로에서는 낙엽 암석 나지 피도가 회복되었고, 식생피도는 산림 환경피해도 등급을 적용하였을 때 제한적인 회복이 이루어진 것으로 나타났다. 이 연구를 통하여 특별보호구 지정을 통해 훼손지의 회복이 가능하나, 토양이 식생에 비하여 더 빠르게 회복됨을 알 수 있었다. 훼손지의 특별보호구 지정은 대상지의 회복특성에 대한 과학적 근거를 기반으로 판단할 필요가 있으며, 특별보호구 제도의 효과성을 높이기 위해 대상지의 생태적 사회적 가치와 중요성을 고려한 세분화된 특별보호구 선정 및 관리 기준이 필요하다.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 1998년도 Proceedings of International Symposium on Remote Sensing
• /
• pp.116-121
• /
• 1998

Global land related datasets such as land use, land cover, vegetation cover percentage, forest cover percentage, are part of important global geospatial environmental datasets for global change studies. Since land cover varies place by place, continental production of dataset is a usual approach. Western academically developed countries have some projects to describe land cover related information in digital form using remote sensing technology in African, American continent and Oceania. In this paper, the author introduce his initiative to coordinate Asian scientists in order to develop land related dataset of Asia for our better understanding of the environment of Asia and for contribution to the development of global dataset. This paper explains activities by Land Cover Working Group (LCWG) of the Asian Association on Remote Sensing(AARS), Data and Information System(DIS) sub-committee of Japan national committee for the International Geosphere and Biosphere Program(IGBP), and the International Society for Photogrammetry and Remote Sensing(ISPRS) Working Group IV/6 on Global databases supporting environmental monitoring.

• 한국산림과학회지
• /
• 제107권1호
• /
• pp.50-58
• /
• 2018

본 연구는 눈개승마 피복이 토양유실 저감에 미치는 영향을 파악하고자, 눈개승마 피복지의 연토양유실량을 측정하였다. 또한 측정한 토양유실량을 바탕으로 RUSLE의 식생피복인자를 산정하였다. 산정한 식생피복인자와 토양유실 저감용으로 식재하는 츄잉훼스큐의 식생피복인자를 비교하여 눈개승마 피복이 토양유실 저감에 효과적인지 파악하였다. 피복종류에 따른 토양유실량은 눈개승마 피복시 2.22 Mg/ha, 츄잉훼스큐 피복시 1.85 Mg/ha, 일반 노지는 10.60 Mg/ha가 발생하였다. 피복 종류에 따른 식생피복인자는 눈개승마에서 $0.09{\pm}0.03$, 츄잉훼스큐에서 $0.08{\pm}0.03$, 일반 노지에서는 $0.35{\pm}0.10$로 나타났다. 나지에서는 $0.83{\pm}0.14$로 나타났다. 산정한 피복별 식생피복인자를 분산 분석한 결과는 피복종류에 따라 평균 값의 차이가 있었다. 사후분석을 통한 동일집단군을 분류한 결과 눈개승마와 츄잉훼스큐는 평균의 차이가 적은 유사집단으로 나타났다. 따라서, 눈개승마는 츄잉훼스큐에 비견될 정도로 토양유실 저감 효과가 있었다.

• 대한공간정보학회지
• /
• 제20권1호
• /
• pp.83-91
• /
• 2012

다양한 산림 정보 중 수관 밀도는 단위면적 당 수관점유 면적의 비율로 정의되며, 다양한 분야에 활용되는 중요한 정보이다. 기존의 측정 방법들은 항공사진 판독 또는 현지 조사를 통해 이루어졌다. 이로 인하여 수관 밀도를 측정함에 있어 시간적/인적/경제적 자원의 소모가 크고, 판독자의 주관 및 경험이 반영되어 자료 제작의 일관성이 부족하다. 따라서 본 연구에서는 KOMPSAT-2 고해상도 위성영상을 이용하여 국내 산림 지역의 수관 밀도를 추정하였다. 고해상도 위성영상에 적합한 영역 기반의 수관 밀도를 추정하기 위해 영상 분할 기법과 임분 경계 정보를 이용하여 산림 내부를 일정 영역으로 구분하고, 판별 분석 기법과 산림 비율 기법을 통해 구분된 영역의 수관 밀도를 추정하였다. 현장 조사 및 영상 판독을 통해 구축한 참조자료와 비교해본 결과 판별 분석 기법은 약 60%, 산림비율 기법은 약 85%의 정확도를 보였다. 연구 결과와 수치 임상도의 비교를 통해 갱신이 필요한 후보지 추출 가능성을 확인하였다.

• 한국환경생물학회:학술대회논문집
• /
• 한국환경생물학회 2005년도 추계학술대회 초록집
• /
• pp.132-133
• /
• 2005

• 한국농림기상학회:학술대회논문집
• /
• 한국농림기상학회 2012년도 학술발표논문집
• /
• pp.44-48
• /
• 2012

• 한국환경복원기술학회지
• /
• 제10권4호
• /
• pp.41-53
• /
• 2007

The Baekdudaegan Mountain Range is a backbone of the Korean Peninsula which carries special spiritual and sentimental signatures for Koreans as well as significant ecological values for diverse organisms. However, in spite of importance of this region, the forests of Baekdudaegan have been damaged in a variety of human activities by being used as highland vegetable grower, lumber region, grass land, and bare land, and are still undergoing destruction. The existing researches had determined the details of the damage through on-site and recent observations. Such methods cannot provide quantitative and integrated analysis therefore could not be utilized as objective data for the ecological conservation of Baekdudaegan forests. The goal of this study is to quantitatively analyze the forest damage in the Baekdudaegan preservation region through land cover categorization and change detection techniques by using satellite images, which are 1980s, and 1990s Landsat TM, and 2000s Landsat ETM+. The analysis was executed by detecting land cover changed areas from forest to others and analyzing changed areas' spatial patterns. Through the change detection analysis based on land cover classification, we found out that the deforested areas were approximately three times larger after the 1990s than from the 1980s to the 1990s. These areas were related to various topographical and spatial elements, altitude, slope, the distance form road, and water system, etc. This study has the significance as quantitative and integrated analysis about the Baekdudaegan preservation region since 1980s. These results could actually be utilized as basic data for forest conservation policies and the management of the Baekdudaegan preservation region.

• 한국환경과학회지
• /
• 제17권5호
• /
• pp.485-491
• /
• 2008

The present study examined the relation between land cover condition and temperature in various types of urban green spaces. The diagram of temperature distribution showed that high-temperature zones are formed around paved areas, and low temperature zone around planted areas and grassy areas. Even in planted areas where low-temperature zones were formed, temperature was different according to hierarchical structure. That is, temperature was relatively low in areas covered with arbor + sub-arbor. With regard to land cover ratio, the increase of planted areas and grassy areas had an effect on the fall of temperature and the effect was higher in order of planted areas and grassy areas. On the contrary, paved areas and bare areas had an effect on the rise of temperature. According to the results of factor analysis, in case of the highest temperature, planted area and grassy area were put together into a factor lowering temperature, paved area and temperature into a factor raising temperature, and bare area alone into a factor of low significance. In case of the lowest temperature, grassy area and bare area were put together into a factor, and the validity of the factor analysis was proved by the analysis of urban heat islands. An increase in the number of trees by height was effective in lowering temperature, and the effect was high in order to arbor and sub-arbor, and the source of coldness in planted area was tall trees.