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Performance of a one-dimensional hydraulic model for the calculation of stranding areas in hydropeaking rivers

Abstract

Fish stranding is a critical issue in rivers with peaking operations. The ability to accurately predict potential stranding areas can become a decisive factor to assess environmental impacts and to plan mitigation measures. The presented work shows that common procedures suggested in the literature in the use of one-dimensional (1D) models for flood zone mapping are not always applicable to compute stranding areas. Specific and easy-to-understand guidance needs to be given for smaller-scale issues. We provide specific guidelines to accurately predict potential stranding areas in a cost-effective manner. By analysing four different river morphologies in detail in a peaking river, we find that the optimal geometry effort (number of cross sections) does not necessarily coincide with the maximum and it varies between channel types according to river physical characteristics such as sinuosity and channel complexity. The use of a 1D model can provide good estimates with an optimal geometry layout. Copyright © 2014 John Wiley & Sons, Ltd.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 193818

Language

English

Author(s)

  • Roser Casas-Mulet
  • Knut Alfredsen
  • Thibault Boissy
  • Håkon Sundt
  • Nils Rüther

Affiliation

  • Norwegian University of Science and Technology
  • SINTEF Energy Research / Energisystemer

Year

2014

Published in

Rivers Research and Applications: an international journal devoted to river research and management

ISSN

1535-1459

Volume

31

Issue

2

Page(s)

143 - 155

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