2006, Vol.15, No.6

Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

pISSN : 1225-7184
https://journal.kci.go.kr/kseia

This study was carried out to offer the systematical and scientific method of regionalenvironment conservation by deciding the rank using fuzzy theory, and try to find themethodology to accurately accomplished the regional environment assessment for sound landconservation. The results were as follows.To transform the Likert’s scale granted to assessment indicators into the type of triangularfuzzy number (a, b, c), there was conversion to each minimum (a), median (b), and maximum(c) in applying membership function. We used the center of gravity and eigenvalue leading tothe rank.In the sequential analysis of rank-based test of assessment indicators by triangular fuzzynumber, the result proclaimed that ranking of the indicators was, in the biotic field, in the orderof ‘dominance’, ‘sociality’, ‘coverage’ and in the abiotic one, ‘soil pH’, ‘T-N’, ‘soil property’, andin the qualitative one, ‘impact rating class’, ‘hemeroby degree’, ‘land use pattern’, and in thefunctional one, ‘protection of water resource’, ‘offer of recreation’, ‘protection of soil erosion’.Therefore, there was a difference between subjective rank from human and the rank fromtriangular fuzzy number. In other words, the scientific rank decision would be not so muchCorresponding Author: Sung-Gwan Jung, Dept. of Landscape Architecture, Kyungpook National University, 1370 Sangyeok-dong, Daegu702-701, Korea Tel: 82-53-950-5783 Fax: 82-53-950-6779 E-mail: sgjung@knu.ac.kr

The excessive land activities in farming can cause soil erosion, inundation by a flood, andfallow. So far land evaluation has been analyzed using the land use limitation derived from theexcessive land activities. This study was done for evaluating the agricultural fields by using 3land use limitations, inundation potential, soil erodibility potential, and fallow potential. Thestudy area is Ibang-myeon, Changnyeong-gun, Gyeongnam-province, Korea.A logistic regression model was applied to recognize the inundation potential by a flood inthe Nakdong river basin. And potential soil erodibility index (PSEI) was derived from USLEmodel to analyze the soil erodibility potential. And a probability model from a logisticregression model was applied to detect the fallow potential.Therefore, we found 220.7ha for the 4th grade and 86.1ha for the 5th grade was analyzed aswater damage potential. Large area near Nakdong river have problem to grow the rice due tothe damage by water inundation. And 213.6ha for the 3rd grade and 103.3ha for 4th grade wasdetected as a result of the analysis of soil erosion potential. The soil erosion potential was highwhen within-field integrity of soil was not stable, or the kinetic energy was high or the slopelength was long due to a steep slope of a specific land. And 869.1ha for 3rd grade, 174.9ha for4th grade, and 110.6ha for 5th grade was detected to be distributed having the fallow potential.Corresponding Author: In-Hwan Park, Dept. of Landscape Architecture, Coll. of Agr. & Life, Kyungpook National University Tel: +82-53-950-5784 E-mail: parkin@knu.ac.kr

Land resources should be managed not only for human utilizations but also forenvironmental preservation. Based on that, environmental capacity should be estimated in bothenvironmental and developmental ways.This study was performed for developing an estimation model for relative environmentalcapacity, considering both Development Tolerance Index(DTI), which shows environmentaland ecological conservation value and is based on national environmental assessmentindicators of the Korea Ministry of Environment, and Development Attractiveness Index(DAI),which shows topographical characteristics and geographical accessibility.The relative environmental capacity in this study can be helpful to coping with the conflict inplanning and managing the use of land resources. The relative environmental capacity in thisstudy, however, did not include either environmental or ecological sensitivity of land resources.This limitation should be solved through further research.