• Title/Summary/Keyword: suitability map

Search Result 105, Processing Time 0.031 seconds

The Design and Implementation of Natural Environmental/Ecological Information System using GIS and RS Data (GIS 및 RS 데이터를 이용한 자연환경/생태계 정보시스템 설계 및 구현)

  • Hwang, Jae Hong;Kim, Sang Ho;Ryu, Keun Ho
    • Journal of the Korean Association of Geographic Information Studies
    • /
    • v.4 no.3
    • /
    • pp.1-12
    • /
    • 2001
  • This thesis represents the integrated 3D DEM using both the process of satellite image and the real value of topographic maps. This DEM is draped on satellite image processed to improve representations of the real world. The 3D visualization and 3D animation with satellite imagery data enables to depict more vivid and realistic world. The paper also describes and implements the natural environmental/ecological information system that consists of 7 modules to manage environmental data systematically through an enhanced user interface. We make use of topographic map, satellite imagery data and several thematic maps. Each module has a user interface enabling to assist particular needs of decision-making for ecological/environmental assessments associated with spatial analysis of ecosystem and classification of the environmental status quo and other purposes.

  • PDF

Study on the Classification of Gyeonggi-Do's Conservation Areas by Improvement of National Land Environmental Assessment (국토환경성평가 개선을 통한 경기도지역의 보전지역 구분에 관한 연구)

  • Lee, Dong-Kun;Sung, Hyun-Chan;Jeon, Seong-Woo;Lee, Sang-Dae;Kim, Kwi-Gon;Kim, Jae-Uk
    • Journal of the Korean Society of Environmental Restoration Technology
    • /
    • v.8 no.4
    • /
    • pp.43-51
    • /
    • 2005
  • Due to rapid and reckless economic development, natural resources of the national land have been damaged and polluted. Accordingly, the necessity for environment-friendly development has been on the rise and many have made efforts to assess the environmental value of the national land. This study divides the conservation areas by means of using relative elevation, slope, and development of housing land based on environmental evaluation of the national land. The relative elevation is obtained by the difference of altitude at the edge of the forest patch extracted from the land cover classification map based on the ridgeline, and the slope is obtained by environment-oriented land suitability analysis. The development of housing land is classified in accordance with the progress of each project. Twenty-six evaluation criteria are divided into five different grades using the minimal indicator approach and then sub-divided into ten grades by means of using the following two scenarios. The first one uses the weight of input materials while the second one relies on the size of patches that are emphasized in landscape ecology. Consequently, such a study demonstrated the following results. The method relying on the weight of input materials revealed the limitation of emphasizing input materials excessively, whereas the method of considering the size of patches resulted in the division of conservation areas that embody regional characteristics. This study is meaningful in that it classifies the conservation areas by reflecting the regional characteristics and the ecological values of animals and plants.

Application of Landscape Ecology Indicators for Conservation Value Assessment (보전가치평가를 위한 경관생태학적 지표의 활용 및 적용)

  • Lee, Dong-Kun;Yoon, So-Won;Kim, Eun-Young;Jeon, Seong-Woo;Choi, Jae-Yong
    • Journal of the Korean Institute of Landscape Architecture
    • /
    • v.32 no.6 s.107
    • /
    • pp.14-22
    • /
    • 2005
  • The purpose of this paper is to assess conservation value of forests and cultivated areas from the landscape ecological point of view. The main focus of landscape ecology estimates the reciprocal relationships between spatial patterns and ecological processes. This paper sets the criteria for conservation value and classify the conservation value based on the criteria. Forests and cultivated areas in Seo-Gu, Incheon Metropolitan City was selected as the case study area. In this research, factors such as patch size and connectivity have been selected in order to consider the landscape ecological aspect, gradient for the environmental physics aspect and to consider the environment-ecological aspect, grade of environmental-oriented land suitability analysis Map developed by the ROK Ministry of Environment has been utilized. GIS methodologies have been adopted to calculate the relationships among the above variables. Through literature review, the following evaluation criteria have been adopted: (1) based on island biogeography and metapopulation dynamics theory, patch size criteria are set 2ha and 10ha; (2) connectivity was set the degree of connection with surrounding grids; and (3) gradient of 20 degrees. Conclusively, this paper suggests that local conditions, landscape ecology and physical environment aspects should be considered to develop an estimation framework of the conservation value.

Spatial Decision Support System for Development and Conservation of Unexecuted Urban Park using ACO - Ant Colony Optimization - (장기 미집행 도시계획시설 중 도시공원을 위한 보전/개발 공간의사결정 시스템 - 개미군집알고리즘(ACO)를 이용하여-)

  • Yoon, Eun-Joo;Song, Eun-Jo;Jeung, Yoon-Hee;Kim, Eun-Young;Lee, Dong-Kun
    • Journal of the Korean Society of Environmental Restoration Technology
    • /
    • v.21 no.2
    • /
    • pp.39-51
    • /
    • 2018
  • Long-term unexecuted urban parks will be released from urban planning facilities after 2020, this may result in development of those parks. However, little research have been focused on how to develop those parks considering conservation, development, spatial pattern, and so on. Therefore, in this study, we suggested an optimization planning model that minimizes the fragmentation while maximizing the conservation and development profit using ACO (Ant Colony Optimization). Our study area is Suwon Yeongheung Park, which is long-term unexecuted urban parks and have actual plan for private development in 2019. Using our optimization planning model, we obtained four alternatives(A, B, C, D), all of which showed continuous land use patterns and satisfied the objectives related to conservation and development. Each alternative are optimized based on different weight combinations of conservation, development, and fragmentation, and we can also generated other alternatives immediately by adjusting the weights. This is possible because the planning process in our model is very fast and quantitative. Therefore, we expected our optimization planning model can support "spatial decision making" of various issue and sites.

Assessing the Metric to Measuring Land-Use Change Suitability (토지 이용 변화 예측 모형의 정확도 검정을 위한 통계량 연구)

  • Kim, Oh Seok
    • Journal of the Economic Geographical Society of Korea
    • /
    • v.16 no.3
    • /
    • pp.458-471
    • /
    • 2013
  • This paper addresses the limitation of a map comparison metric entitled Figure of Merit through employing a simple land change model. The metric was originally designed to overcome limitations of other existing statistics, such as Kappa, when assessing predictive accuracy of land change models. A series of comparisons between null and predicted outcomes at multiple resolutions as well as a multi-resolution Figure of Merit analysis techniques of validation are compared for spatially segregated calibration and validation datasets. The Figure of Merit at the null resolution in this paper was 57%, although future research must be done to determine if this was simply a coincidence. A Figure of Merit greater than 50% would seem to represent a "Resolution of Merit" in that the Figure of Merit at that resolution becomes greater than the error. Thus, these two metrics should be used in tandem to assess predictive accuracy of a land change model.

  • PDF

A Development of the Evaluation Criteria for Bicycle's Facilities of Attending Work and School Trip (통근·통학형 자전거 이용시설 평가지표 개발)

  • Won, Jaimu;Jin, Wonyoung
    • KSCE Journal of Civil and Environmental Engineering Research
    • /
    • v.32 no.5D
    • /
    • pp.429-435
    • /
    • 2012
  • A Development of the Evaluation Criteria on the User's Bicycle Environment for Work and School Trip Purpose: This study suggests future improvements and some current questions about the development of the evaluation criteria on the user's bicycle environment for Work and School Trip Purpose. The direction of development on Evaluation Criteria is all about on the side of necessity of bicycle users, the reflection of new policy, the construction of total evaluation criteria, and the examination of connecting study with current study. This study establishes a Development of the Evaluation Criteria on the User's Bicycle Environment for Work and School Trip Purpose. After that, this study examines previous evaluation criterias and researchers will select the primary provision of evaluation through FGI, and they derive the final evaluation criteria throughout the verification of suitability on Evaluation Criteria. The summery of this study is like this. First, suggestions of improvements of zones in bicycles users' evaluations, Second Suggestions of the current conditions by GIS and the result of model analysis, Third Clarify of major provisions in terms of zones by using Spider Map.

A Development of the Service Evaluation Criteria for the Expressway Service Areas on the Side of Users (이용자측면의 고속도로 휴게소 서비스 평가지표 개발)

  • Won, Jaimu;Jin, Wonyoung
    • KSCE Journal of Civil and Environmental Engineering Research
    • /
    • v.32 no.5D
    • /
    • pp.421-427
    • /
    • 2012
  • This study develops the evaluation model which is for assessing on the side of users in expressway service areas, and researchers apply this study for monitoring expressway service areas by routes. The direction of development on Evaluation Criteria is all about on the side of necessity of rest area users, the reflection of current conditions, the construction of total evaluation criteria, and the examination of connecting study with current study. After that, this study examines previous evaluation criterias and researchers will select the primary provision of evaluation through FGI, and they derive the final evaluation criteria throughout the verification of suitability on Evaluation Criteria. Throughout AHP analysis which is a professional survey system of users, researchers dereive on the side of facilities, on the side of environments facilities, on the side of position, and on the side of services in order by the weightings. As you can see in this study, this study also considers quantitative and qualitative factors together, and it allows to evaluate conditions of rest areas. In addition, this study can be a primary study for suggesting the ways of improvements of rest areas by using Spider Map and for monitoring future study.

A Study on Forest Land Classification Using Multivariate Statistical Methods : A Case Study at Mt. Kwanak (다변수통계방법을 이용한 산지분류에 관한 연구)

  • 정순오
    • Journal of the Korean Institute of Landscape Architecture
    • /
    • v.13 no.1
    • /
    • pp.43-66
    • /
    • 1985
  • Korea needs proper and rational public policies on conservation and use of forest land and other natural resources because of the accelerating expansion of national land developments in recent years. Unfortunately, there is no systematic planning system to support the needs. Generally, forest land use planning needs suitability analysis based on efficient land classification system. The goal of this study was to classify a forest land using multivariate satistical methods. A case study was carried out in winter of 1983 on a mountainous area higher than 100m above sea level located at Mt. Kwanak in Anyang -city, Kyung-gi-do (province). The study area was 19.80 km$^2$wide and was divided into 1, 383 Operational Taxonomic Units (OTU's) by a 120m$\times$120m grid. Fourteen descriptors were identified and quantified for each OTU from existing national land data : elevation, slope, aspect, terrain form, geologic material, surface soil permeability, topsoil type, depth of the solum, soil acidity, forest cover type, stand size class, stand age class, stand density class, and simple forest soil capability class. For this study, a FORTRAN IV program was written for input and output map data, and the computer statistics packages, SPSS and BMD, were used to perform the multivariate statistical analysis. Fourteen variables were analyzed to investigate the characteristics of their fire quench distribution and to estimate the correlation coefficients among them. Principal component analysis was executed to find the dimensions of forest land characteristics, and factor scores were used for proper samples of OTU throughout the study area. In order to develop the classes of forest land classification based on 102 surrogates, cluster and discriminant analyses of principal descriptor variable matrix were undertaken. Results obtained through a series of multivariate statistical analyses were as follows ; 1) Principal component analysis was proved to be a useful tool for data selection and identification of principal descriptor variables which represented the characteristics of forest land and facilitated the selection of samples.

  • PDF

A Study on the Feasibility Assessment for Selecting Recreation Forest Sites: The Case of Gwangju-si in Gyeonggi-do (휴양림 조성 대상지 선정을 위한 타당성 평가 연구 - 경기도 광주시를 중심으로 -)

  • Seo, Jung-young;Yeom, Sung-Jin
    • Journal of Environmental Science International
    • /
    • v.28 no.11
    • /
    • pp.959-969
    • /
    • 2019
  • This study sought to contribute to the revitalization of local economy by developing a natural recreation forest, which is the base of ecotourism recreation, through utilizing forest resources and the natural environment of Gwangju-si. The study conducted a feasibility assessment through on-site surveys such as the suitability of the candidate sites, location analysis, and possibility of damage to the forest, before developing recreation forest sites in Gwangju-si and, based on the result, selected appropriate subject sites. The candidates for this study were 5 forest sites such as one site in the Mokheon-dong area, two in the Docheok-myeon area, and one in the Toechon-myeon area. For this study, the current status of the natural recreation forest was surveyed, its feasibility index and assessment process were investigated, and the local status and related regulations of Gyeonggi-do and Gwangju-si were reviewed. The final subject sites were selected after feasibility assessment utilizing assessment index in order to evaluate the candidate sites. The feasibility assessment was conducted after three separate on-site surveys for each candidate site between October 2018 and January 2019 utilizing "The Feasibility Assessment Criteria for Natural Recreation Forest (Notification 2018-71)" of the Korean Forest Service. The items instrumental to the feasibility assessment were classified into landscape, location, water system, induction of recreation, and development condition; the assessment was made after redefining each item into detailed items. Through this process, the Usan-ri area was selected as the final site for developing natural recreation forest, having obtained more than 100 points according to "The Feasibility Assessment Criteria for Natural Recreation Forest" of the Korean Forest Service. In order to develop natural recreation forest in the Usan-ri area in the future, further discussion is necessary with the relevant departments in consideration of the degree of ecological zoning map.

Investigation on the nonintrusive multi-fidelity reduced-order modeling for PWR rod bundles

  • Kang, Huilun;Tian, Zhaofei;Chen, Guangliang;Li, Lei;Chu, Tianhui
    • Nuclear Engineering and Technology
    • /
    • v.54 no.5
    • /
    • pp.1825-1834
    • /
    • 2022
  • Performing high-fidelity computational fluid dynamics (HF-CFD) to predict the flow and heat transfer state of the coolant in the reactor core is expensive, especially in scenarios that require extensive parameter search, such as uncertainty analysis and design optimization. This work investigated the performance of utilizing a multi-fidelity reduced-order model (MF-ROM) in PWR rod bundles simulation. Firstly, basis vectors and basis vector coefficients of high-fidelity and low-fidelity CFD results are extracted separately by the proper orthogonal decomposition (POD) approach. Secondly, a surrogate model is trained to map the relationship between the extracted coefficients from different fidelity results. In the prediction stage, the coefficients of the low-fidelity data under the new operating conditions are extracted by using the obtained POD basis vectors. Then, the trained surrogate model uses the low-fidelity coefficients to regress the high-fidelity coefficients. The predicted high-fidelity data is reconstructed from the product of extracted basis vectors and the regression coefficients. The effectiveness of the MF-ROM is evaluated on a flow and heat transfer problem in PWR fuel rod bundles. Two data-driven algorithms, the Kriging and artificial neural network (ANN), are trained as surrogate models for the MF-ROM to reconstruct the complex flow and heat transfer field downstream of the mixing vanes. The results show good agreements between the data reconstructed with the trained MF-ROM and the high-fidelity CFD simulation result, while the former only requires to taken the computational burden of low-fidelity simulation. The results also show that the performance of the ANN model is slightly better than the Kriging model when using a high number of POD basis vectors for regression. Moreover, the result presented in this paper demonstrates the suitability of the proposed MF-ROM for high-fidelity fixed value initialization to accelerate complex simulation.