EMERGY 분석법에 의한 득량만의 환경용량 산정

The Estimation of Carrying Capacity in Deukryang Bay by EMERGY Analysis

  • EUM Ki-Hyuk (Department of Environmental Engineering, Pukyong National University) ;
  • SON Ji-Ho (Department of Environmental Engineering, Pukyong National University) ;
  • CHO Eun-Il (Department of Environmental Engineering, Pukyong National University) ;
  • LEE Suk-Mo (Department of Environmental Engineering, Pukyong National University) ;
  • PARK Chung-Kil (Department of Environmental Engineering, Pukyong National University)
  • 발행 : 1996.09.01

초록

득량만의 양식업에 대한 EMERGY분석결과 연안해역에 대한 영속성 에너지원의 EMERGY 유입은 $54.60\times10^{18}sej/yr$, 비영속성 에너지원인 화석연료의 유입은 $1.50\times10^{18}sej/yr$ 그리고 재화와 용역에 의한 유입은 $13.55\times10^{18}sej/yr$이고, 자연환경으로부터의 유입이 전체 에너지원의 $78\%$를 차지하고 있어 환경자원에 대한 의존도가 높은 1차 산업의 구조적 특징을 나타내고 있다. Net EMERGY yield ratio는 4.63으로 자원으로서의 가치가 높음을 나타내고, EMERGY investment ratio는 0.28로 주 경제로부터 유입된 에너지의 약 3.6 배에 해당하는 에너지를 자연환경으로부터 얻고 있음을 알 수 있다. 1994년 득량만의 환경용량은 영속성 에너지원에 근거하여 유입된 EMERGY량이 모두 현재의 EMERGY 생산비대로 생산이 된다면 득량만 전체에서는 어류; 1,140ton/yr, 갑각류; 110ton/yr, 패류; 1,553ton/yr, 해조류; 9,074ton/yr이며 1994년 생산량은 환경용량의 $80\%,\;92\%,\;80\%,\;84\%$를 생산하고 있음을 알 수 있었다. 그리고, 면적이 6,617ha(전체면적의 $17.67\%$)인 양식장만을 고려하여 유입된 EMERGY가 전부 패류의 생산에 이용된다면 패류양식장의 생산용량은 1,195ton/yr로 산출되었다.

The developments of mariculture fisheries depend on both the natural environmental inputs such as sun, rain, wind, tide and the economic inputs such as ships, fuels, facilities, labor. for the enhancement of mariculture productivity in Deukryang Bay, a new attempt has been made to connect the environmental resources and the economic activity within one system. This study applies EMERGY analysis that evaluates environmental energies, fuels, goods and services in terms of solar emjoelus. In total EMERGY use $(69.65\times10^{20}\;sej/yr)$ the natural environment inputs is $78\%\;(54.60\times10^{20}\;sej/yr)$. This means that the mariculture in Deukryang Bay depends on mainly environmental resources. Net EMERGY yield ratio was 4.63 which indicated high value as a resource, EMERGY investment ratio was 0.28 that means to gain 3.6 times energy from the natural environment than those of economy. If the fisherie's products are made by renewable EMERGY input to Deukryang Bay, the calculated carrying capacity of fishes, crustaceans, shellfish and seaweeds were 1,140, 110, 1,553 and 9,074 ton/yr, respectively. If the quantity of renewable EMERGY input to mariculture grounds in Deukrysng Bay was calculated-based on only shellfish product, shellfish products was estimated as about 1,195 ton/yr.

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