Publisher: Academic Press
ISSN: 0301-4797
Source: Journal of Environmental Management, Vol.66, Iss.3, 2002-11, pp. : 293-306
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
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 energy 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 the dam might increase stress on local environment.
Related content
Emergy evaluation of food production in urban residential landscapes
By Beck T.B.
Urban Ecosystems, Vol. 5, Iss. 3, 2001-09 ,pp. :
By Ferreyra Cecilia Brown Mark T.
International Journal of Environment and Sustainable Development, Vol. 6, Iss. 1, 2007-03 ,pp. :