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http://dx.doi.org/10.11108/kagis.2021.24.1.026

Evaluation of Non-point source Vulnerable Areas In West Nakdong River Watershed Using TOPSIS  

KAL, Byung-Seok (Daonsolution. Co. Ltd.)
PARK, Jae-Beom (Daonsolution. Co. Ltd.)
KIM, Ye-Jin (Catholic University of Pusan, Dept. of Environmental Engineering)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.24, no.1, 2021 , pp. 26-39 More about this Journal
Abstract
This study investigated the characteristics of the watershed and pollutants in the Seonakdong River basin in the lower stream of the Nakdong River Water System, and evaluated the areas vulnerable to nonpoint pollution by subwatershed according to the TOPSIS(Technique for Order of Preference by Similarity to Ideal Solution) method. The selection method consists of selection of evaluation factors, calculation of weights and selection of areas vulnerable to non-point pollution through evaluation factors and weights. The entropy method was used as the weight calculation method and TOPSIS, a multi-criteria decision making(MCDM) method was used as the evaluation method. Indicator data were collected as of 2018, and national pollution source survey data and national statistics were used. Most of the vulnerable watersheds were highly urbanized had a large number of residents and were evaluated as having a large land area among industrial facilities and site area rate. Through this study, it is necessary to approach a variety of weighting methodologies to assess the vulnerability of non-point pollution with high reliability, and scientific analysis of the factors that affect non-point pollution sources and consideration of the effects are necessary.
Keywords
Entropy Method; Nonpoint source; TOPSIS; Vulnerable area;
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