하도습지의 생태보전 및 치수를 고려한 하천관리 방안 연구
Study on River Management Plan Considering Ecological Preservation and Flood Control of Riverine Wetland
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초록
하천변에 위치한 하도습지는 치수사업을 통한 치수가치와 하도습지의 생태적 보전가치가 대립함으로써 사회적 갈등을 야기하고 있다. 본 연구에서는 하도습지의 치수가치와 생태가치에 대한 경제성 분석을 통해 두 가치 모두의 중요성을 확인하였으며, 이러한 결과를 바탕으로 치수안전과 생태보전을 고려한 하도습지 관리방안을 제시하고자 하였다. 이를 위해 다차원 홍수피해산정방법(MD-FDA)과 조건부가치측정법(CVM)을 이용하여 임진강 하구유역의 연평균 홍수피해액과 하도습지의 생태보전가치를 산정하였다. 분석결과, 임진강 하구지역은 치수사업도 필요하고, 하도습지의 생태적 보존가치 역시 중요하여 단계별 치수사업과 하도습지의 보호를 위한 관리방안 수립이 필요한 것으로 나타났다. 그 결과 임진강 하도습지는 지속적으로 퇴적이 발생하고 홍수위가 상승하는지역으로 분류되었다. 이를 바탕으로 임진강 하구는 하천정비사업 시 치수안전과 생태보전을 함께 확인하며 진행하는 것이 필요하고, 생태계 교란을 최소화하기 위한 단계적인 하천정비시행이 바람직할 것으로 판단되었다. 본 연구에서 도출된 결과를 토대로 향후 치수사업과 하도습지의 보존을 함께 고려한 하천관리방안 수립을 위한 기초자료로 활용 될 수 있을 것으로 기대된다.
Abstract
The riverine wetlands located in the riverside bring about social conflicts through confrontation between flood control value throughflood control project and ecological preservation value of riverine wetland. In this study, we identified the importance of both valuesthrough analysis of economic feasibility of flood control and ecological values of riverine wetland, and tried to suggest managementplans for riverine wetland considering both of flood control safety and ecological preservation through these results. For this, wecalculated the expected annual flood damage of Imjin River using the multi-dimensional flood damage analysis(MD-FDA), andcalculated the total value of riverine wetland using the contingent valuation method(CVM) to estimate preservation value of riverinewetland. The result of the analysis shows that the Imjin River needs flood control project and the ecological preservation of riverinewetland is also important. Therefore, the establishment of the management plan for protecting riverine wetland is also needed. As aresult, the Imjin riverine wetland was classified as the area where sedimentation continues to take place, and the flood water level torise. On the basis of the analyzed results, it is judged that the Imjin River needs flood control for public safety and ecologicalconsideration for ecosystem preservation in the river improvement project. So, the stepwise river improvement is desirable to protectriverine wetland and minimize ecosystem disturbance. The results is expected to be made good use as the basic study forestablishment of institutional river management plans considering flood control project and riverine wetland preservation in the future.
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