Emergy 평가법을 이용한 개발계획의 타당성 분석 및 의사결정

Abstract

Rapid economic growth has led an affluent life to human, despoiling the environment. Therefore, Environmentally Sound and Sustainable Development(ESSD) has been the key issue to preserve environment. Above all, methods and techniques for environmental decision-making based on verified validity through assessment in early stages of development has played significant role. However, when it comes to most of the existing methods, environmental values don’t weigh as much as economic values. Then there are no choices but to conduct assessment inclined economic side or the best policy is establishing mitigation plan administering environmental disruption. This study aimed to suggest a tool for validity assessment and decision-making on development proposals by Emergy concepts which can analysis the real wealth of economic and environmental values. Yield(Y), Emergy Yield Ratio(EYR), Environmental Loading Ratio(ELR) and Emergy Sustainability Index(ESI) are selected as a validity assessment indices derived by the result of Emergy accounting. Although having the result of improvement in all figures after development than before is the ideal conditions because of difficulty in reality, the range of each figures are being decided by region and industry. The flow chart suggests how to assess validity and make a decision with Emergy by processing the result of this study. When it applied to the real case, this method revealed that the development of Saemangeum, Garorim bay and Sejong city with 500 thousands population were not appropriate and that the development of Shiwha lake and Sejong city with 300 thousands population is deserved. These development proposals passed Environmental Impact Assessment(EIA) and this because EIA and other methods can not compare the real worth of economic cost and benefit with environmental loss led by the development. Also it approves that the result predicted by development would not excess the standards which lay down at least to keep the situation. But this study evaluates both environment and economy equally, presenting these values as a same units. Therefore, when make definitive decisions, considering social and cultural conditions, this result will contribute to support a scientific basis.