• 제목/요약/키워드: forest functions

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Analyzing the Type and Priority Order of Forest Functions for Private Forests (사유림의 산림기능평가를 위한 기능유형 및 우선순위 분석)

  • Park, Young-Kyu;Roh, Hye-Jung;Jeon, Jun-Heon;Kim, Hyung-Ho
    • Journal of agriculture & life science
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    • v.44 no.6
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    • pp.51-59
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    • 2010
  • This study was conducted to analyze the type and priority order of forest functions that is suitable in assessing a private forest. A questionnaire survey of experts group and forest officers from the city and county office was conducted and the appropriateness of forest functions type and priority order of function were assessed. Based on the survey conducted, they mostly agreed that it is necessary to change the name of forest functions and integrate the forest functions. Four classifications of forest functions were presented: resources rotation, water yield, living environment, and forest conservation. As the variety of organizations and geographical areas determine which forest functions are the priority, it is necessary to determine which function will become the priority order according to geographical areas, instead of simply dividing the forest functions into national and publicly owned forest when assessing the forest functions of private forests across the nation.

Directions for Forest Functions Mapping in Korea (산림녹지기능도의 도입 방향)

  • 변무섭;최만봉;김계환
    • Journal of the Korean Institute of Landscape Architecture
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    • v.29 no.5
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    • pp.101-114
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    • 2001
  • This study analyzed and examined literature and legislation in Korean and other countries to examine the concept and sense of mapping of forest functions that would be used as basic information for efficient application and management of forest ecosystems. The mapping of forest functions in Germany has been utilized to field data for efficient work and management of the ecosystem, and evaluation of forest environmental ecology by the mapping of forest functions has been applied directly or indirectly in country management plans, conservation of nature and landscape management plans. Forest protection areas in Korea were analysed for creating a map of forest functions. As the results, forest functions could be sorted into five categories, such as conservation area of forest production, prevention of disasters, landscape and abiological natural resource, valuable biotope and ecosystem and civil recreation. The mapping method was applied to these 5 categories important conservation targets. It is considered that mapping of forest functions in Korea can be used for systematic forest works and efficient ecosystem utilization and management, as well as it use basic data for environmental and ecological comprehension and evaluation on forest and green tract of land on the level of country development and utilization.

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Study on Forest Functions Classification using GIS - Chunyang National Forest Management Planning - (GIS를 이용한 산림기능구분에 관한 연구 - 춘양 국유림 산림경영계획구를 대상으로 -)

  • Kwon, Soon-Duk;Park, Young-Kyu;Kim, Eun-Hee
    • Journal of the Korean Association of Geographic Information Studies
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    • v.11 no.4
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    • pp.10-21
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    • 2008
  • A forest functions classification map is an essential element for the management planning of national forests. This study was intended to make out the map at the stand level by utilizing the Forest Functions Evaluation Program(FFEP), developed by Korea Forest Research Institute. In this program, the potential of each function was evaluated in each grid cell, and then a forest functions estimation map was generated based on the optimum grid cell values in each sub-compartment unit. Finally, the program produced a forest functions classification map with consideration of the priority of the functions. The final forest functions classification map required for the national forest management planning made out overlapping those results which the rest of the forest classified referring priority functions classification map to national forest manager and classified according to the local administrative guidance and sustainable forest resources management guidance. The results indicated that the forest function classification using the FFEP program could be an efficient tool for providing the data required for national forest management planning. Also this study made a meaningful progress in the forest function classification by considering the local forest administrative guidance and sustainable forest resources management guidance.

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A Case Study for Evaluating Forest Functions by Watershed Unit: Gyeongsangnam-do (경상남도 유역단위 산림기능평가에 관한 사례연구)

  • Kim, Hyung-Ho;Park, Young-Kyu;Roh, Hye-Jung;Jeon, Jun-Heon;Hwang, Jin-Yeong;Kang, Hyeon-Deug;Park, Joon-Hyung
    • Journal of the Korean Association of Geographic Information Studies
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    • v.14 no.3
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    • pp.163-173
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    • 2011
  • This paper, as a case study on the evaluation of nationwide-unit forest functions, targeting the entire Gyeongsangnam-do region, examined the integration measures for the evaluation of national, public and private forest functions, as well as GIS data problems and GIS data building methods. Also, the distribution and characteristics of Gyeongsangnam-do's forest functions were examined. First, as integration measures for forest function evaluation, evaluation unit was proposed as watershed unit, and GIS techniques were proposed to correct some patterns of errors shown in the watershed maps. Also, of GIS data used for forest function evaluation, maps of locations of saw mills to be revised, expressway interchange location maps, and population distribution maps were built nationwide. Based on watershed units, the forest functions of 20 cities and counties in Gyeongsangnam-do were evaluated, revealing that wood production function and forest recreation function potentials, high-ranking was high distributed throughout the site, while most functions potentials, low-ranking was low distributed. In forest function maps with the application of priority by city and gun, the area size was ranked in the order of forest recreation, timber production, natural conservation, water yield, living environment conservation, and prevention of natural disaster. Case analysis results for large areas can be used in evaluating nationwide forest functions.

Development of a GIS Application Model for Evaluating Forest Functions (산림기능평가를 위한 GIS 응용모델의 개발)

  • Kim, Hyung-Ho;Chong, Se-Kyung;Chung, Joo-Sang
    • Journal of the Korean Association of Geographic Information Studies
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    • v.9 no.4
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    • pp.1-11
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    • 2006
  • This paper aims to develop a GIS(Geographic Information System) application model as a decision-making support system in order to evaluate the potential of forests according to their functions, or to classify forest functions. The forest functions analyzed in this study are as follows: production of timber, stable supply of water resources, forest hazards prevention, recreation in forests, conservation of living conditions and natural environment. Using a model possible to evaluate the potential of each forest function and to assort forest functions by making priority-based decisions according to the functions, as well as allowing for various possible analysis environments, its application has been reviewed. Factors for assessing the forest functions could be built by using the following three categories: four maps-topographical map, vegetation map, forest site map and basic forest land use map-whose quantitative drawings had already been made; other self-established maps, such as one indicating the location of sawmills, location map of expressway interchanges, and spatial data of national population distribution map; and attribute data of population and precipitation. The GIS application developed here contributes to the evaluation of forest functions in all the subject areas by map units and national forest management districts based upon the assessment system.

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Evaluation of Forest Functions Considering the Distribution Patterns of Communal Forests at the Watershed Level (공유림 분포패턴을 고려한 유역단위 산림기능평가)

  • Gwun, Soonduk;Jang, Kwangmin;Seol, Ara;Chung, Joosang
    • Journal of Korean Society of Forest Science
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    • v.97 no.1
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    • pp.71-76
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    • 2008
  • The objective of this study was to determine the effective land units of communal forests for evaluating forest functions using GIS. As the candidates of the effective land units, we chosen the administrative units of parcels and 3 different scales of watersheds; small, medium and large. However, the administrative units of parcels were discarded because of the extreme complexity of ownerships and the highly petty scales of parcels. Instead, the 3 different levels of watershed units were applied to evaluating forest functions and the effectiveness of the resultant functional maps were compared each other in terms of the appropriateness or adequacy for field applications. According to the results of this study, it was found that the aggregated area by watersheds provides the appropriate scales of land area for forest functions and the small watershed is the most adequate one as the effective land units for forest functions in communal forests.

Optimal Forest Management for Improving Economic and Public Functions in Mt.Gari Leading Forest Management Zone (가리산 선도산림경영단지의 경제적·공익적 기능 증진을 위한 산림관리 최적화 방안)

  • Kim, Dayoung;Han, Hee;Chung, Joosang
    • Journal of Korean Society of Forest Science
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    • v.110 no.4
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    • pp.665-677
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    • 2021
  • This study analyzed the optimization method of forest management to enhance economic and public functions, as well as the interrelationship among timber production, carbon storage, and water conservation functions in Mt.Gari leading forest management zone. For these purposes, a forest management planning model was developed using Multi-Objective Linear Programming. The model had an objective function to maximize the total NPV (Net Present Value) of weighted timber production, carbon storage, water conservation, and constraints to limit the rate of change in timber production, percentage of each age-class and tree species area, percentage of conifers and broad-leaved trees area in each management zone, minimum timber production and timber sales amount. Based on the description of forest inventory and the comprehensive plan of Mt.Gari, we analyzed stand information and management constraints of the study area. We compared management alternatives using different weights in the objective function. Therefore, the total NPV was maximized in the alternative considering the three functions in equal proportion, rather than the alternatives of maximizing only one function. When all three functions were considered simultaneously, timber production offset the carbon storage and water conservation, and carbon storage and water conservation interacted synergistically. However, when considering only two of the three functions, all combinations of functions demonstrated tradeoffs with one other. Therefore, we discovered that by considering all three functions equally, rather than only one or two functions, the economic and public values of the study area can be maximized.

GIS Application for Evaluating Forest Recreation Functions (GIS를 이용한 산림휴양기능평가)

  • Han, Su-Jin;Lee, Woo-Kyun;Kwak, Doo-Ahn
    • Journal of the Korean Association of Geographic Information Studies
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    • v.9 no.1
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    • pp.13-19
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    • 2006
  • In previous classification, forest recreation functions were evaluated by same factors and couldn't consider various characteristics of forest resources. The purpose of this study is to evaluate the recreational function of forest resources by applying different factors to each forest resources. We selected Daegu and Mt. Jiri as study area and divided forest resources into visitor-oriented and forest-oriented recreational resources. The level of recreational functions were evaluated with three grade(low, medium, high). In consequence, our study found out that it is more effective to evaluate forest recreational function by applying accessibility and attraction factors to each forest resources than previous work.

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Management Direction about Comparison of Protection Forest on Korea and Japan (한국과 일본의 보안림 비교를 통한 관리 방향)

  • Park, Jae-Hyeon
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.9 no.4
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    • pp.67-75
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    • 2006
  • This study compared with the object of designation and the management practices for Protection Forests between Korea and Japan to establish the management and development directions of Korea's Protection Forest. 1. Water conservation forest from total areas of Protection Forests occupied 90.6 % in Korea and 68.4 % in Japan, respectively. The water conservation forest was the most important function among the Protection Forest's functions in both countries. 2. The 10 million ha of Protection Forest in Japan increased for last 100 years. The 100 thousand ha per year was designated as Protection Forest. In contrast, The 655,535 ha of Protection Forest in Korea decreased for last 42 years with decreasing of 15,000 ha per year. 3. In Japan, Protection Forest can be managed by forest silvicultural practices such as forest harvest, thinning, and pruning to recover and improve the Protection Forest's functions. 4. In case of Korea, it is necessary to a mid- or long-term counter plan to increase the area of Protection Forest by the government, and needs to the recovery and improvement of Protection Forest's functions.

Crown Ratio Models for Tectona grandis (Linn. f) Stands in Osho Forest Reserve, Oyo State, Nigeria

  • Popoola, F.S.;Adesoye, P.O.
    • Journal of Forest and Environmental Science
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    • v.28 no.2
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    • pp.63-67
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    • 2012
  • Crown ratio is the ratio of live crown length to tree height. It is often used as an important predictor variable for tree growth equation. It indicates tree vigor and is a useful parameter in forest health assessment. The objective of the study was to develop crown ratio prediction models for Tectona grandis. Based on the data set from the temporary sample plots, several non linear equations including logistics, Chapman Richard and exponential functions were tested. These functions were evaluated in terms of coefficient of determination ($R^2$) and standard error of the estimate (SEE). The significance of the estimated parameters was also verified. Plot of residuals against estimated crown ratios were observed. Although the logistic model had the highest $R^2$ and the least SEE, Chapman-Richard and Exponential functions were observed to be more consistent in their predictive ability; and were therefore recommended for predicting crown ratio in the stand.