Prévisions du l’influence de la vidange des sédiments sur l’environnement dans un groupe de trois barrages

Translated title of the contribution: Predictions of environmental effect due to sediment sluicing at a series of three dams

Takeshi Yoshimura, Hiroki Shinya, Tetsuya Sumi, Norio Onikura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

With the flood disaster experienced in the Mimikawa River system due to Typhoon Nabi in 2005, various problems caused by sediment in the river basin became clear, including increased risk of flooding with rising riverbed levels in dam-regulating reservoirs, grain coarsening in the downstream river channel with the entrapment of sediment in dams, and the destabilization of bridge piers in the downstream river channel. As part of an effort to resolve all these problems simultaneously, from 2017 sediment sluicing at a series of dams was implemented. Sluicing is an operation carried out when there is river flooding due to typhoons. Dam-regulating reservoir drawdown is carried out, and sediment flowing into these reservoirs from the upstream is allowed to flow downstream of dams. This paper principally covers 1) an overview of sediment sluicing at dams in the Mimikawa River system, 2) understanding and analysis of the river environment prior to sluicing, 3) predictions of the effect on the river environment due to sluicing, and 4) testing of these predictions.

Translated title of the contributionPredictions of environmental effect due to sediment sluicing at a series of three dams
Original languageFrench
Title of host publication26th International Congress on Large Dams, 2018
PublisherCRC Press/Balkema
Pages379-402
Number of pages24
ISBN (Print)9781138612280
Publication statusPublished - Jan 1 2018
Event26th International Congress on Large Dams, 2018 - Vienna, Austria
Duration: Jul 4 2018Jul 6 2018

Publication series

Name26th International Congress on Large Dams, 2018

Conference

Conference
CountryAustria
CityVienna
Period7/4/187/6/18

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering

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