Journal of Environmental Impact Assessment (환경영향평가)

Korean Society of Environmental Impact Assessment (한국환경영향평가학회)
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The Effect of Ecological Restoration and Water Purification of Ecological Fish-way and Floodplain Back Wetland Created as Sustainable Structured Wetland Biotope at Maeno Stream

매노천에서 생태적수질정화비오톱(SSB)으로 창출된 생태어도 및 홍수터 배후습지의 생태계 복원과 생태적 수질정화효과

  • Received : 2017.08.31
  • Accepted : 2017.11.15
  • Published : 2017.12.31
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Abstract

This study monitored the changes before and after restoration of ecological stream focusing on the places which are applied Sustainable Structured wetland Biotop (SSB) system and ecological Fish-way for restoration of Maeno stream. A total of 11 species and 191 individuals of fishes were founded out which were not verified inhabitation before restoration at SSB wetlands. Especially, it was could identified that micro habitat and healthy Fish-way was created because the restored target species, Microphysogobio yaluensis and Iksookimia koreensis were identified that habitation was monitored in SSB wetland. Amphibian have been restored to a number of Rana nigromaculata found in and around wetlands at the time of the third survey, which is highly active after restoration. Specified endangered species class 1 and natural monuments designated by the Ministry of Environment, Lutra lutra lutra, as a Mammalian, uses the wetlands and ecological Fish-way as habitat areas, and the his habitat is restored. In the case of Flora, vascular plants emerging in the survey area were increased to 7 and 13 species before restoration and 15 and 19 species directly after restoration, and 22 species and 33 species after restoration. Vegetation after restoration was found to be a basic producer of various ecosystems and a plant community that contributes to the purification of water quality such as Phragmites japonica communities. As the result of water quality monitoring, the average of treatment efficiencies were BOD 64.3%, T-N 47.2%, T-P 80.7%. Successful treatment of the nonpoint pullution source, which is a limiting factor to disturb the ecosystem, creatively restored the target species in the water quality class I, II.

본 연구는 매노천 생태하천복원을 위한 생태적수질정화비오톱 시스템과 생태어도(Fish-way) 등의 적용 대상지를 중심으로 생태하천 복원 전 후를 모니터링하였다. 어류는 복원전 서식이 확인되지 않았던 생태적수질정화비오톱 습지에서 총 11종 191개체가 창출복원된 것으로 조사되었다. 특히 복원목표종인 돌마자와 참종개가 생태적수질정화비오톱 습지에서 서식함이 모니터링되어, 미소서식처와 건전한 Fish-way가 창출되었음을 확인할 수 있었다. 양서류는 복원후 활동성이 높은 3차 조사시기에 습지와 그 주변에서 다수의 참개구리 서식으로 복원되었음이 확인되었다. 포유류는 수달이 습지와 Fish-way를 서식영역으로 활용하는 것이 확인되어 환경부 멸종위기 제1급이자 천연기념물인 수달 서식지가 복원된 것으로 조사되었다. 식물상의 경우 조사지역에 출현하는 관속식물은 복원 전 총 7과 13종, 복원직후 15과 19종, 복원후 총 22과 33종으로 증가되었다. 복원후 식생은 달뿌리풀 군락 등의 다양한 생태계의 기초생산자이자 수질정화에 기여하는 식재종인 정수식물군락이 형성된 것으로 조사되었다. 수질 모니터링 결과, 평균적으로 BOD 64.3%, T-N 47.2%, T-P 80.7%의 처리효율을 나타내었다. 생태계를 교란하는 제한요인(limiting factor)이 되는 비점오염원이 성공적으로 처리됨으로써 I, II등급수질에 서식하는 목표종이 창출적으로 복원되었다.

Keywords

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