Water Research Institute Sefydliad Ymchwil Dŵr
Assessing mitigation options in hydropeaking rivers Roser Casas-Mulet1 Knut Alfredsen2 Svein Jakob Saltveit3 1 Water
Research Institute, Cardiff University, Wales, UK 2 Norwegian University of Science and Technology, Trondheim, Norway 3 Natural History Museum, University of Oslo, Oslo, Norway
Water Research Institute
Atlantic salmon life cycle
Final remarks
Outputs
Protocol
Site
Intro
Sefydliad Ymchwil Dŵr
Atlantic Salmon Life Cycle
Water Research Institute
Final remarks
Outputs
Protocol
Site
Intro
Sefydliad Ymchwil Dŵr
Gravel stages survival
Water Research Institute
Hydropeaking impacts
Final remarks
Outputs
2 1.5
Stage
Protocol
Site
Intro
Sefydliad Ymchwil Dŵr
1
0.5 0
Dec 2011
Jan. 2012
Feb. 2012
March 2012
Dewatering of redds
Water Research Institute
Today’s talk
Final remarks
Outputs
Protocol
Site
Intro
Sefydliad Ymchwil Dŵr
• Protocol to assess mitigation options • Implications for management • Case study: The Lundesokna
Water Research Institute
The Lundesokna
Final remarks
Outputs
Protocol
Site
Intro
Sefydliad Ymchwil Dŵr
Atlantic Salmon Life Cycle
Water Research Institute
Final remarks
Outputs
Protocol
Site
Intro
Sefydliad Ymchwil Dŵr
Assessment protocol
Water Research Institute
Critical survival periods
Final remarks
Outputs
Protocol
Site
Intro
Sefydliad Ymchwil Dŵr
alevins Ramping zone
embryo Permanently wet area
Water Research Institute
Flow release options
Final remarks
Outputs
Protocol
Site
Intro
Sefydliad Ymchwil Dŵr
8 m3.s-1
Min. production flow 3.5 m3.s-1 alevins 0.65 m3.s-1 embryo
0.3 m3.s-1 Min. flow
Water Research Institute
Mitigation options
Intro
Sefydliad Ymchwil Dŵr
Targeted Lowering +Release
Site
Atlantic Salmon Life Cycle
Final remarks
Outputs
Protocol
mollanmedia.com/
Targeted Release
adfg.alaska.gov
dev.nature.ca
Protocol
Site
Intro
Sefydliad Ymchwil Dŵr
Cost-efficiency Targeted Release
Implementation: 1.8% of annual revenue
Final remarks
Outputs
Targeted Lowering +Release
Implementation: 0.7% of annual revenue
Opportunity revenue Opportunity cost Extra start cost
Water Research Institute
Water Research Institute
Feasibility
Sefydliad Ymchwil Dŵr
Intro
Targeted Release
Protocol
Site
Always possible to release
Final remarks
Outputs
Targeted Lowering +Release
xxx
xx x x x
Hydro System constraints
Water Research Institute
Site
• Not only cost-efficiency but feasibility are important • Targeted options are the way to go
Final remarks
• Our protocol can be a useful tool in the decisionmaking process
Protocol
Take-home messages
Outputs
Intro
Sefydliad Ymchwil Dŵr
• Need to understand individual hydropower systems
Water Research Institute
Sefydliad Ymchwil Dŵr Sefydliad Ymchwil Dŵr
Thank you!
Water Research Institute
For more details on this research:
Sefydliad Ymchwil Dŵr
Check out: Casas-Mulet R, Saltveit SJ, Alfredsen KT. 2016. Effects of hydropeaking on salmonid gravel stages: a modelling approach for implementing mitigation strategies. Science of the Total Environment 573, 1660-1672. Casas‐Mulet R, Alfredsen K, Killingtveit Å. 2014. Modelling of environmental flow options for optimal Atlantic salmon, Salmo salar, embryo survival during hydropeaking. Fisheries Management and Ecology 21 (6), 480-490.
Get in touch!
[email protected] Water Research Institute
Managing water for people and ecosystems in a changing world www.cardiff.ac.uk/water-research-institute
