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Emergy evaluation perspectives of a multipurpose dam proposal in Korea

Title
Emergy evaluation perspectives of a multipurpose dam proposal in Korea
Authors
Kang, DPark, SS
Ewha Authors
박석순
SCOPUS Author ID
박석순scopus
Issue Date
2002
Journal Title
JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN
0301-4797JCR Link1095-8630JCR Link
Citation
vol. 66, no. 3, pp. 293 - 306
Keywords
emergymultipurpose dambenefitcost
Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The 'emergy' concept was used to evaluate the economy of Korea and the contributions of a multipurpose dam proposal to the real wealth of the Korean economy. Emergy is defined as the available emergy of one kind previously used up directly and indirectly to make a product or service. The indices for Korea calculated from the emergy evaluation were close to those of developed countries. Even though its monetary balance of payments was negative in 1997, the economy of Korea showed positive balance in trade when exports and imports were expressed in emergy. The emergy evaluation showed that the Korean economy places a large stress on its environment. Water supply and generation of electricity were the most important contributions of the proposed dam in terms of emergy, 46(.)5 and 45(.)1% of the, total benefit, respectively. Flood control contributed 8(.)4% of the total benefit. Major costs associated with the proposed dam were from sediments (33(.)2% of the total cost), construction services (22(.)8%), and social disruption of the region (21(.)6%). In terms of emergy, the ratio of benefits to costs of the proposed dam was 2(.)78 if sediments are not included, and 1(.)86 if sediments are included, which result in more benefits than costs in both cases. The benefit to cost ratio of the dam was larger than that of the current system (1(.)42) without the dam whether sediments are included in the total cost or not. The environmental stress of the proposed dam was considerably lower than that of the Korean economy, but them dam might increase stress on local environment. (C) 2002 Published by Elsevier Science Ltd.
DOI
10.1006/jema.2002.0594
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엘텍공과대학 > 환경공학전공 > Journal papers
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