• Title/Summary/Keyword: 산림 모니터링

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Applicability Analysis of Drought Index using Multi-temporal NDVI in Korean Peninsula (한반도의 다중시기 NDVI를 이용한 가뭄지수 적용성 분석)

  • 신수현;국민정;이규성
    • Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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    • 2004.03a
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    • pp.203-208
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    • 2004
  • NDVI (Normalized Difference Vegetation Index)는 식생의 건강상태 및 농작물 생산량 추정등에 효과적인 식생지수로, 20년 이상 축적된 MOAA NDVI data의 경우, 식생의 시기적, 계절적 변화탐지가 가능해져 이를 바탕으로 한 가뭄지수들이 개발되어 가뭄 모니터링에 사용되어지고 있다 지난 2001년, 한반도는 기상관측 이래 90년만의 강수량 최저치를 기록하여 전국적인 대 가뭄의 피해를 입었으며, 특히 북한은 유엔이 선정한 가뭄에 가장 취약한 국가로 그로 인한 식량난이 더욱 악화되고 있어 가뭄에 대한 정보는 필수적이라 할 수 있다. 이에 본 연구에서는 1994~2002년의 식물 생장기(growing season : 3~10월)동안 NDVI 10일 최대값 합성영상 (10-day maximum composite data)을 사용하여 남북한으로 나누어진 한반도를 대상으로 각각의 식생현황을 파악 및 비교하고, 산림, 농지, 도시지역별로 NDVI와 가뭄의 주원인인 강수량과의 상관관계로 그 효용성을 분석하였다. 그 결과, NDVI는 1~2개월 전 강수량의 영향이 가장 컸으며, 특히 농지지역에서의 상관계수가 높게 나타났다.

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Evaluation of the Forest Bird Community in the Breeding Season by using the Sound Recording System (산림성 조류의 번식기 음성녹음을 이용한 조류군집 평가)

  • Yoo, Seung-Hwa;Han, Hyun-Jin;Kim, Dong-Won;Joo, Woo-Young
    • Korean Journal of Environment and Ecology
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    • v.32 no.1
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    • pp.39-46
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    • 2018
  • Breeding bird surveys provide the reference information for understanding bird community structure and function in the ecosystem and conserving biodiversity. Recent rapid change of biodiversity due to climate change and other factors has made it necessary to utilize acoustic sensors for accuracy and spatial expansion of forest bird survey data and for time-series monitoring of forest birds. The objective of this study is to investigate the possibility of using acoustic recording sensor to evaluate the diversity of forest birds at breeding season by comparing and analyzing the recorded data of bird songs and field bird survey data. We conducted the site survey and recording in 186 points in 48 areas of 4 regions of Gombaeryeong and Jochimryeong around Jeombongsan Mountain and Jugryeong and Gochiryeong around Sobaeksan Mountain from May 2nd to 16th in 2013. The analysis of the correlation between the recording result and Bird Community Index based on the field survey showed that the number of bird species, population, and the number of bird songs by recording was significantly correlated to the number of species and population by field survey. Moreover, the number of bird species and the number of bird songs by recording showed a significant correlation to species diversity and species richness but no or low significant correlation to species evenness by the field study (observation and listing in parallel). As a result, it was possible to check species composition and species diversity of bird communities by analyzing acoustic recording data on the field. The acoustic recordings of bird songs in the breeding period were more reliable than the non-breeding period in the correlation of recording result and species diversity and for utilization.

Designing Payments for Environmental Services on Genetic Reserve Forest in Korea (생물다양성서비스 지불제 도입방향: 산림유전자원보호림을 대상으로)

  • Ahn, SoEun;Lee, Chang-Hoon;Ryu, Kwang-Su
    • Journal of Korean Society of Forest Science
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    • v.97 no.3
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    • pp.305-315
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    • 2008
  • Payments for Environmental (or Ecosystem) Services (PES) are emerging as new conservation policy tools. The basic concept underlying PES is that users pay to providers of environmental services for ensuring the continual provision of services based on the voluntary contracts. The purpose of this paper is to introduce the concepts and types of PES and to design a pilot PES scheme for biodiversity/ecosystem conservation on Genetic Reserve Forest in Korea. Genetic Reserve Forest is one of the protected areas designated in Korea to maintain forest biodiversity. PES is designed for the pine forests only in Genetic Reserve Forest, which corresponds to 943 ha. Service providers are to manage their forests based on the contracts in ways that maintain and enhance forest biodiversity and receive the payments in return. The payments are calculated as the sum of management, monitoring, and opportunity costs, resulting 1,140,378 won/year/ha (it corresponds to approximately $1,227 based on the 2007 average exchange rate 1$ = 929.2 won). Because PES are relatively new policies, however, more work needs to be done. Future work includes researches on the correlation between forest biodiversity and management practices and the economic evaluation of forest biodiversity. In addition, enhancing awareness on PES and education of stakeholders are warranted to further develop the scheme.

A Study on the Deterioration Status of the Seonjaryeong Forest Trails in the Baekdudaegan Ridge (백두대간 마루금 선자령순환등산로의 숲길훼손실태 연구)

  • Lee, Sugwang;Lee, Jinkyu;Kim, Myeongjun;Bang, Hongseok
    • Journal of Korean Society of Forest Science
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    • v.110 no.1
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    • pp.91-105
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    • 2021
  • We conducted a study to identify the relationships between the investigated factors and provide a methodology and generate data by applying deterioration classes to the Seonjaryeong Forest Trail (4.3 km) in the Baekdudaegan Ridge. The average trail width (1.7 m) and bare width (1.4 m) were wider than those obtained in the previous studies. The frequency of trail deterioration was also high. Specific data on deterioration classes were obtained and evaluated using qualitative criteria. Specific data for heavy class stands at 20.1% in trail grade, 13.3 cm on average, and 16.1 cm in the center of erosion depth, 16.2 cm of CSA, 12.3 kg/cm (20.1 mm) on average and maximum 39.3 kg/cm (29.6 mm) of soil hardness. We observed a positive correlation between the deterioration class and trail grade, and the average and maximum soil erosion depths of the hill side were deeper than those of the ridge. The soil hardness data showed a statistically significant difference in terms of the transect site and calculation method (㎏/㎠, mm). Therefore, trail deterioration was observed at the sites having ≥20% trail grade; thus, continuous monitoring at fixed sites over time will be required for sustainability. Furthermore, the trail grade should be of the utmost priority in trail design and management.

Analysis on the Status of Joint Forestry Project in National Forest (국유림 공동산림사업 실태분석에 관한 연구)

  • Kim, Dong-Hyeon;Ko, Chi-Ung;Kim, Dong-Geun
    • Journal of agriculture & life science
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    • v.53 no.6
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    • pp.45-53
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    • 2019
  • The purpose of this study is to analyze the status of the joint forest project, which is one of the national forest management system, by using stakeholder participation, transparency of decision making, accountability of actors and stakeholders, The questionnaire survey was conducted using the 5 - point scale and the written form. As a result of the questionnaire survey, various stakeholder participation items had the highest opportunity to participate with an average of 3.3 and the lowest score with 2.3 points for establishing conflict and conflict resolution structures. Transparency was analyzed to be 3.4 points for the project disclosure, 2.7 points for information sharing and education promotion activities for local residents, 3.3 points for the detailed role of the project implementer, and 2.7 points for internal and external monitoring and evaluation of the project with various stakeholders. The results of this research, analyzed through the participatory forest management index, are deemed to be used as basic data for the establishment of a plan for the revitalization of national forest participation management.

The Study on the Habitat Change of Nannophya pygmaea Ramber in the Abandoned Paddy Field Ulsan City and Its Management (울산시 산림휴경지의 꼬마잠자리 서식지 변화 및 관리방안 연구)

  • Kim, Dong-Eon
    • Korean Journal of Environment and Ecology
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    • v.25 no.6
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    • pp.867-877
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    • 2011
  • A study was conducted to find the habitat change and the insects and flora that live in the abandoned paddy field in Daun-dong Jung-gu, Ulsan, to provide basic information for the conservation and restoration of Nannophya pygmaea Ramber from June 2008 to July 2011. In case of the insects, 53 species in 32 families of 10 orders were identified, with Odonata, Hemiptera and Coleoptera being the three dominants (18.9% in total). For flora, 60 species in 30 families of 23 orders were identified, with Cyperaceae and Gramineae being the dominants(13.3% and 11.7%, respectively). The influx of woody plants in the surveyed area led to the rapid progress of succession and the carnification of the habitats for aquatic plants. Besides, the number of phytophagous insects and mountainous insects were increasing. Consequently, the habitat of Nannophya pygmaea Ramber has been relocated to the place, whose water depth remains unchanged at 2.5~9.5cm and water space is opened. Therefore, it is required to conduct long-term monitoring and appropriate management based on the ecological characteristic of the habitats to continuously conserve and maintain the habitats of Nannophya pygmaea Ramber.

Potential of Using Oribatid mites(Acari: Oribatida) as Biological Indicators of Forest Soil Acidification (산림토양 산성화의 생물지표로써 날개응애(Acari: Oribatida) 이용 가능성)

  • Chuleui Jung;Joon-Ho Lee;Seong-Sik Choi
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.4 no.4
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    • pp.213-218
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    • 2002
  • The use of biological indicator for environmental monitoring has suddenly become popular in many international organizations as well as domestic ones. Since the biological indicator species should be well responsive to native environmental change, development of native indicator species is prerequisite for environmental assessment and restoration program. Through regression analysis of mean density and pH, potential indicator species were screened from Namsan and Kwangreung where differential environmental stresses are influenced; Lasiobelba remota, Ceratozetes sp. Tectocepheus velatus, Neogymnobates sp. and Oppia sp.3. Also keystone species in two study area were Lohmannia coreana, Ceratozetes sp., Rostrozetes pulcherrimus, and Lasiobelba remota in Namsan Deciduous forest and Neogymnobates sp., Neogymnobates donghaksaensis, and Cultroribula tridentata in Kwangreung. Advantages and disadvantages of using biological indicator for environmental monitoring were further discussed.

Monitoring for the Restoration of Evergreen Broad-leaved forest in Warm Temperate Region(II) (난대 기후대의 상록활엽수림 복원 모니터링(II))

  • 오구균;최송현;나경태;김성현
    • Korean Journal of Environment and Ecology
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    • v.17 no.4
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    • pp.316-323
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    • 2004
  • In order to monitor the vegetation restoration in the evergreen broad-leaved forest, eighteen experimental plots including control plots were established at Wando Arboretum in 1996. Several treatments such as density control, selective cutting and warm temperate species planting were done in the experimental plots. Seven years after the restoration experiments, the important percentage of Quercus acuta showed a tendency to a higher increase in the experiment plots than control plots in Q. Acutu. Also the important percentage of Q. Acuta in Q. acute Carpinus tschonoskii community increased in the tree layer. Pinus densiflora community was increased highly in important percentage of Q. Acuta, As a whole, vegetation structure in the experiment plot showed successional stage to Q. Acutu community. In addition, important percentage of evergreen broad-leaved trees and shrubs and number of warm temperate species and basal area were increased in the experiment plots while the introduced evergreen broad-leaved trees were declined.

Avian research trends in Korea analyzed by text-mining and co-word analysis: based on articles of the Korean Journal of Ornithology (텍스트마이닝과 동시출현단어 분석을 이용한 국내 조류학 연구동향: 한국조류학회지 논문을 대상으로)

  • Jin, Chaelyeong;Eo, Soo Hyung
    • Korean Journal of Ornithology
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    • v.25 no.2
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    • pp.126-132
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    • 2018
  • For balanced development of ornithological research in Korea, it is important to review what birds and what research topics have been studied so far. We quantitatively investigated the trends of domestic ornithological research using text-mining and co-word analysis. As a result of studying 372 articles published in the Korean Journal of Ornithology, which is the most representative ornithological journals, words related to research topics such as population and community monitoring, first record of species and breeding ecology, and heavy metal pollution in birds have been widely used in research articles. Except for subjects such as monitoring and first record of species, studies have not been conducted widely. It was also found that research were concentrated on specific birds such as Anas platyrhynchos, Calidris alpina, and Anas poecilorhyncha. The present study, which analyzed the research topics and avian taxa that were relatively active until now and those which were insufficient, suggests what we should do in the future for the balanced development of ornithological research in Korea.

Application of ECVAM as a Indicator for Monitoring National Environment in Korea (국토환경 모니터링 지표로서의 국토환경성평가지도 활용방안)

  • Kim, Eunyoung;Jeon, Seong-Woo;Song, Wonkyong;Kwak, Jaeryun;Lee, June
    • Journal of Environmental Policy
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    • v.11 no.2
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    • pp.3-16
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    • 2012
  • Objectives of the Korean Environmental Conservation Value Assessment Map (ECVAM) is to evaluate environmental value used in comprehensive environmental information in order to encourage eco-friendly land use and management. The first research was conducted in 2001 to establish the evaluation items and the criteria of the ECVAM, and the first nationwide map was established in the period of 2003 to 2005. The maps are updated annually to reflect environmental changes of land. The evaluation items and the criteria have been modified based on feasibility studies to improve the accuracy of the maps. This study re-evaluated the ECVAMs from 2005 to 2010 with criteria used in current environment and analyzed the changes in the area of the maps in 6 years. This is also an investigation on the maps whether they are appropriate as an index for sustainable environmental monitoring. The result shows that the 1st grade level of the ECVAM area with the highest conservation value had been expanding since 2005. These changes were analyzed in terms of updating the 4th Forest Map (2008) produced once every 10 years, reflecting the new legal protected areas such as Baekdudaegan Protected Area(2010), and the environmental/ecological assessment items such as the National Ecological Network (2009). This mean the ECVAM are a monitoring index that integrates individual environmental indexes including the increase of forest age and diameter due to sustainable management of forest areas, and the change of conservation areas. Therefore, ECVAM can be used as a new index integrating national environmental indicators for monitoring changes of national environment and policy. In order to utilize the ECVAM, improving accuracy and reducing renewal cycle time of thematic maps are required.

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