2004, Vol.13, No.3

Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

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

As most of environmental impacts caused by development projects are irrevocable, athorough review is utmost necessary. Ecological-economic integrated approach inspired byNorgaard’s co-evolution theory should be applied to the environmentally adjusted CBA, whichplays a decisive role in the feasibility analysis. Based on case studies of NamHan RiverManagement Project and Yeongsangang Wetland Reclamation Project, this paper attempts toshow the usefulness of linking basic plan and implimentation design to EIA and suggests tointegrate EACBA into the current EIA system institutionally as a more effective policy tool forrealizing sustainable development in Korea.

To utilize a closed municipal solid waste landfill site in environmentally secure conditions, it is necessary to verify the stabilization level of landfill leachate. To assess leachate stabilization of an open-dumping municipal solid waste landfill (Noeun Landfill) which is located at the upper drainage basin of Namhan River which flows into Lake Paldang utilized for Seoul Metropolitan water supplies, the surrounding characteristics of the landfill site was surveyed. After then, leachate, groundwater and soil samples from this landfill were chemically analyzed, and the analysis results were evaluated by “The Criteria of Landfill Waste Stabilization(CLWS)”, “Discharge Criteria of Landfill Leachate”, “The Criteria of Domestic Use in Groundwater Quality”, and “Soil Contamination Criteria” promulgated by Korean Ministry of Environment. The closed open-dumping landfill was equipped with the final soil cover, 3 groundwater monitoring wells and poor landfill gas extraction devices for the post-closure management of the landfill. BOD/CODcr ratios in leachate were less than or slightly higher than 1/10. This results seemed to imply that the leachate stabilization level of this landfill based on the CLWS was almost completed. Qualities of groundwater sampled from monitoring wells located at outside of landfill were adequate for “The Criteria of Domestic Use in Groundwater Quality”.Finally, concentrations of soil contaminants that were likely to be influenced by this landfill site were adequate to “Soil Contamination Criteria”.

Many of today’s environmental problems are regional in scope and their effects overlap andinteract. The purpose of this paper is to developed a simple method for an integratedassessment of environmental conditions across the Mid-Nakdong River Region, by combiningdata 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 groupsof sub-watersheds with similar environmental characteristics. The mean value for each groupwas 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 vegetationwas low. Watersheds in cluster III, which located in the middle Geumho River and the maincourse of Nakdong River, had a greater proportion of their agriculture, a greater proportion ofagriculture on steep slopes, and less forest adjacent to streams. Watersheds in cluster IV and Vwere in the most urbanized areas of the region. The principal adverse impacts for watersheds inthis group were high scores for urban area, impervious cover, pollutant loadings, populationdensity, 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.