Performance of a One‐Dimensional Hydraulic Model for the Calculation of Stranding Areas in Hydropeaking Rivers

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...

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Bibliographic Details
Published in:River research and applications 2015-02, Vol.31 (2), p.143-155
Main Authors: Casas‐Mulet, R, Alfredsen, K, Boissy, T, Sundt, H, Rüther, N
Format: Article
Language:English
Subjects:
1D hydraulic modelling
Channels
cost effectiveness
Cross sections
Environmental assessment
Environmental impact
Fish
Guidelines
hydropeaking
hydropower
Mathematical models
Optimization
planning
Rivers
Stranding
stranding area estimation
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Summary: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.
ISSN:1535-1459
1535-1467
DOI:10.1002/rra.2734