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A seismic monitoring approach to detect and quantify river sediment mobilization by steelhead redd-building activity

Dietze, Michael and Losee, James and Polvi, Lina and Palm, Daniel (2020). A seismic monitoring approach to detect and quantify river sediment mobilization by steelhead redd-building activity. Earth Surface Processes and Landforms. 45 , 2840-2849
[Journal article]

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Abstract

The role of spawning salmonids in altering river bed morphology and sediment transport is significant, yet poorly understood. This is due, in large part, to limitations in monitoring the redd-building process in a continuous and spatially extended way. A complementary approach may be provided through the use of a small seismic sensor network analysing the ground motion signals generated by the agitation of sediment during the redd-building process. We successfully tested the viability of this approach by detecting and locating artificially generated redd signals in a reach of the Mashel River, Washington State, USA. We then utilize records of 17 seismic stations, in which we automatically detected seismic events that were subsequently manually checked, yielding a catalogue of 45 potential redd-building events. Such redd-building events typically lasted between 1 and 20 min and consisted of a series of clusters of 50-100 short energetic pulses in the 20-60 Hz frequency range. The majority (>90%) of these redd-building events occurred within 11 days, predominantly during the early morning and late afternoon. The seismically derived locations of the signals were in agreement with independently mapped redds. Improved network geometry and installation conditions are required for more efficient detection, robust location and improved energetic insights into redd-building processes in larger reaches. The passive and continuous nature of the seismic approach in detecting redds and describing fish behaviour provides a novel tool for fish biologists and fisheries managers, but also for fluvial geomorphologists, interested in quantifying the amount of sediment mobilized by this ecosystem engineer. When complemented with classic approaches, it could allow for a more holistic picture of the kinetics and temporal patterns (at scales from seconds to multiple seasons) of a key phase of salmonid life cycles. (c) 2020 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd

Authors/Creators:Dietze, Michael and Losee, James and Polvi, Lina and Palm, Daniel
Title:A seismic monitoring approach to detect and quantify river sediment mobilization by steelhead redd-building activity
Year of publishing :2020
Volume:45
Page range:2840-2849
Number of Pages:10
ISSN:0197-9337
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geophysics
Keywords:environmental seismology, ecosystem engineers, salmonid spawning, gravel-bed rivers, biogeomorphology
URN:NBN:urn:nbn:se:slu:epsilon-p-107112
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107112
Additional ID:
Type of IDID
DOI10.1002/esp.4933
Web of Science (WoS)000551689300001
ID Code:17679
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Wildlife, Fish and Environmental Studies
Deposited By: SLUpub Connector
Deposited On:02 Oct 2020 15:51
Metadata Last Modified:02 Oct 2020 16:01

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