A review on sediment replenishment to river channel for natural recovery of regulated rivers below large dams

Giyoung Ock; Chang-Lae Jang; Bomchul Kim; Mikyoung Choi

doi:10.3741/JKWRA.2019.52.S-2.835

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2019 Vol.52, Issue 10S Preview Page Next Page

Research Article

A review on sediment replenishment to river channel for natural recovery of regulated rivers below large dams 댐하류 조절하천의 자연성 회복을 위한 하천 유사환원 연구 고찰

31 October 2019. pp. 835-844

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Abstract

This study dealt with a systematic approach for sediment replenishment works which defines the artificial supply of coarse sediment to downstream river channels of dams. That is an increasing practice in Japanese, American and European rivers for the purpose of compensating sediment deficits downstream and rehabilitating geomorphological habitats below dams. We introduced five main objectives of the sediment replenishment, simply from construction of artificial spawning redds for anadromous fish to restoration of fluvial geomorphological process of river system. Then we suggested determination of sediment size distribution and quantity of coarse sediment as well as selecting an effective implementation method in corresponding to specific objectives and local restrictions in the basin, reservoir and river.

Keywords

Sediment supply

Dam impacts

River restoration

Natural recovery

본 연구는 댐에 의해 유사공급이 제한되는 댐하류 하천에서 자연성 회복을 위한 근본적 방안으로서 댐 건설 후 감소된 유사의 공급과 이송능력을 회복하기 위하여 인공적으로 하천에 모래와 자갈과 같은 토사를 공급하는 하천 유사환원 연구 기술을 체계적으로 고찰하였다. 유사환원의 목적을 초기의 수질 개선과 어류의 인공산란처 조성에서부터, 이후 저수지 퇴사대책, 하천구조물 안전성 유지, 그리고 최근의 하천의 지형형성 과정 회복까지 다섯 개로 구분하여 제시하였으며, 이러한 사업 목적에 따른 공급토사의 크기, 공급량, 현장에서 적용되는 공급방법과 모니터링 방안을 국내외 연구사례를 들어 체계적으로 고찰하였다. 앞으로 국내 하천관리에서 환경유량과 유사환원이 연계된 통합 하천관리 기술발전에 기여하기를 기대한다.

키워드

유사공급

댐 영향

하천복원

자연성 회복

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Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 52
No :10
Pages :835-844
Received Date : 2019-07-17
Revised Date : 2019-09-15
Accepted Date : 2019-10-02
DOI :https://doi.org/10.3741/JKWRA.2019.52.S-2.835

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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