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An Integrated Watershed Environmental Assessment and Classification of the Mid-Nakdong River Region  

Jung, Sung-Gwan (Department of Landscape Architecture, Kyungpook National University)
Park, Kyung-Hun (Department of Geography Program in Planning, University of Toronto)
Publication Information
Journal of Environmental Impact Assessment / v.13, no.3, 2004 , pp. 137-151 More about this Journal
Abstract
Many of today's environmental problems are regional in scope and their effects overlap and interact. The purpose of this paper is to developed a simple method for an integrated assessment of environmental conditions across the Mid-Nakdong River Region, by combining data on land use, impervious cover, roads, streams, riparian areas, forest patches, population, pollutant loadings, soil erosion and topography. A cluster analysis was used to identify groups of sub-watersheds with similar environmental characteristics. The mean value for each group was used to find watershed that may be more vulnerable to future environmental degradation. Watersheds in cluster I and II had high amount of forest, but the amount of riparian vegetation was low. Watersheds in cluster III, which located in the middle Geumho River and the main course of Nakdong River, had a greater proportion of their agriculture, a greater proportion of agriculture on steep slopes, and less forest adjacent to streams. Watersheds in cluster IV and V were in the most urbanized areas of the region. The principal adverse impacts for watersheds in this group were high scores for urban area, impervious cover, pollutant loadings, population density, forest fragmentation, and low amounts of forest and riparian forest cover. Notwithstanding the exploratory nature of cluster analysis, it appears to be a useful tool for grouping watersheds with similar environmental characteristics.
Keywords
Watershed environment; Cluster analysis; Nakdong River; Landscape ecology; GIS;
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Times Cited By KSCI : 1  (Citation Analysis)
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