The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Emergy-Based Value of the Contributions of the Youngsan River Estuary Ecosystem to the Korean Economy

에머지 방법론을 이용한 영산강 하구생태계의 기여 가치 평가

  • Kang, Daeseok (Department of Ecological Engineering, Pukyong National University)
  • Received : 2013.02.03
  • Accepted : 2013.02.13
  • Published : 2013.02.28
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Abstract

An emergy concept was used to evaluate the contributions of the Youngsan River Estuary to the Korean economy from systems and ecosystem service perspectives. Total emergy input to the estuary was $9.42{\times}10^{20}$ sej/yr with the chemical potential of river inflow accounting for 73% of the total and tidal energy for the remaining 27%, reflecting the unique environmental characteristics of estuaries where rivers meet sea. From the systems perspective, the estuary ecosystem contributed 179.9 billion em\/yr (14.91 million em\/ha/yr or 13,526 em$/ha/yr). Four ecosystem services of the Youngsan River Estuary were selected for the emergy evaluation: fishery production, pollutant removal, aesthetic function, and scientific research information. Aesthetic function contributed the most to the Korean economy with 179.9 billion em\/yr, followed by fishery production (101.1 billion em\/yr), pollutant removal (32.6 billion em\/yr), and scientific research information (934 million em\/yr). Emergy-based values of the selected ecosystem services of the estuary were higher than those calculated by economic methodologies.

에너지 관점에서 생태계의 가치를 평가하는 에머지 개념과 방법론을 이용하여 영산강 하구해역 생태계가 우리 경제에 기여하는 가치를 시스템 관점과 생태계 서비스 관점에서 평가하였다. 하천과 바다가 만나서 형성되는 하구생태계의 특성을 반영하여 하천의 화학에너지가 유입에머지 총량($9.42{\times}10^{20}$ sej/yr)의 73%로 가장 많은 에머지를 공급하였으며, 조석에너지는 27%를 기여하였다. 영산강 하구생태계로 유입하는 자연환경에너지를 이용하여 시스템 관점에서 영산강 하구가 경제에 기여하는 가치를 평가한 결과 약 1,799억 em\/yr(1,491만 em\/ha/yr 또는 13,526 em$/ha/yr)으로 나타났다. 영산강 하구생태계가 제공하는 서비스의 가치는 수산물생산, 오염정화, 심미 기능, 과학연구의 네 가지만을 대상으로 평가하였다. 이 가운데 심미 기능의 가치가 1,799억 em\/yr으로 가장 높았으며, 수산물생산(1,011억 em\/yr), 오염정화(326억 em\/yr), 과학연구(9.3억 em\/yr)의 순으로 나타났다. 에너지를 이용하여 자연환경과 경제활동을 평가하는 에머지 방법론의 특성을 반영하여 이 연구에서 평가한 영산강 하구의 생태계 서비스 가치는 경제학적 방법을 이용한 평가보다 높았다.

Keywords

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