Title: Macroinvertebrate drift response to hydropeaking simulations with varying peak discharge and ramping velocities
Authors : Schülting, Lisa
Dossi, Florian
Graf, Wolfram
Tonolla, Diego
Conference details: 12th International Symposium on Ecohydraulics (ISE 2018), Tokyo, Japan, 19-24 August 2018
Issue Date: 2018
License (according to publishing contract) : Not specified
Type of review: Peer review (abstract)
Language : English
Subjects : Hydropeaking; Macroinvertebrate drift
Subject (DDC) : 577: Ecology
Abstract: There is evidence that, besides shear stress and flow velocity, the rapidity of flow changes (up- and down-ramping) during a hydropeaking event may be a decisive factor regarding the harmfulness for riverine biota. Quantification of this assumption is still lacking, therefore we present an experimental approach, addressing macroinvertebrate drift response following hydropeaking events with five different ramping velocities at three different peak discharges. Our results indicate that drift responses of macroinvertebrates strongly relate to peak discharge and corresponding flow velocities. Further, our observations indicate that low ramping velocities reduce the drift-rates when discharge-related thresholds at peak flow are exceeded. Measures addressing these key parameters, such as the construction of compensation basins are therefore expected to have strong mitigating effects.
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Natural Resource Sciences (IUNR)
Publication type: Conference other
URI: https://digitalcollection.zhaw.ch/handle/11475/14917
Published as part of the ZHAW project : Verdriftung von Makroinvertebraten infolge von Schwall-Sunk
Appears in Collections:Publikationen Life Sciences und Facility Management

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