낙동강 하구둑의 기능에 대한 에머지분석

Abstract

Estuary is the important place. We constructed the barrage in the Nak-Dong River Estuary, thus so many changes happened. We analysed the eco-economical benefits and cost with Emergy analysis before and after the barrage construction. The big changes can be divided into five parts. First, Environmental resources energy inputs are the decrease of tidal Energy and the increase of Earth cycle energy. Second, economic purchased inputs for water quality management and management of the barrage are increased. Third, production parts of water supply, Transportation, Electricity and Mineral Product are increased. Forth, indigenous storages of mud&sediment, phytoplankton, benthos are decreased. And the last, the cost of construction is added. Total eco-economical benefit-cost is following ; Construction of barrage gained 1.20E+10won/yr as energy sources and lost 1.02E+11won as energy storages and construction cost.