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SB 839 (2013) Science Sub-Task Force

Final Report

In this document, the science subgroup reviews studies and methods for the protection of seasonally varying flows and makes recommendations to the Seasonally Varying Flows Task Force.

Click here to view this report

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This science task force involves experts from the Oregon Department of Fish and Wildlife, U.S. Geological Survey, U.S. Fish and Wildlife Service, and the Oregon Water Resource Department. 

Brett Brownscombe from the Governor’s Office will be the convener of this group and Dr. Brenda Bateman from the Oregon Water Resources Department will staff these efforts.

Eventually a few members of this sub-task force will be asked to carry the resulting report into the broader SB 839 Task Force.
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Purposes and Outcomes

Purpose:  This group is the scientific sub-task force designed to look at the hydrologic realities of building water storage projects.  This technical effort will involve a small group of scientists with expertise in streamflow, particularly “seasonally varying flows” (formally known in Oregon as “peak and ecological flows”).  Although the terminology has changed in the law, the science has not and we expect to draw heavily upon the robust work conducted in Oregon and other states during the past several years. 

Outcome:  This group will produce a report by February 1, 2014, containing recommendations to the SB 839 Task Force, describing those methodologies that would be sanctioned, or approved, by the State of Oregon to determine “seasonally varying flow” requirements in the development of a water storage projects.  This determination includes:  1) whether water is available for storage and 2) how ultimately to shape / store the water that is deemed available.
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Below is the schedule of meeting dates:

​Oct. 16 – ​Introductory Meeting: intros, purpose, fundamental definitions, lit review (available methods)
​Oct. 30 – ​Case Studies: What states have had success applying specific methods in their decision-making?
​Nov. 13 – ​Drafting the Report: Rank or evaluate available methods for determining seasonally varying flow requirements.
​Dec. 4 – ​Drafting, Continued:  Recommend which sanctioned (approved) methods that would work in Oregon; report requires group consensus.  Note any outliers or disagreements.
​Dec. 18 – ​Wrap Up:  finalize report, signing logistics, decide who carries report to larger task force -  This meeting is scheduled from 10:00 am to 3:00 p.m.
Meetings will be held in Salem at WRD HQ (725 Summer St., NW, 3rd Floor Rogue Conference Room), with a conference call-in / video option.
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General Resources:
​Senate Bill 839 (2013):  https://olis.leg.state.or.us/liz/2013R1/Measures/Text/SB839/Enrolled
2013 Meitzen
​2013 USGS Summary of Environmental Flow Assessments by State
2011 Richter et al
​2010 Merritt - FWB
2010 Oregon Water Resources Department White paper
2010 Poff, Ecological Responses to Altered Flow Regimes
​2010 Poff and Zimmerman - FWB
2010 USGS - MA - Open File 1139
2009 Petts, Instream Flow Science for Sustainable River Management
​​2009 Richter
​​2008 Konrad et al - FWB
2008 Wilding and Poff, Flow Ecology Relationship
2006 Richter, A Collaborative and Adaptive Process for Developing Environmental Flows
2006 Arthington, Challenge of Providing Environmental Flow Rules to Sustain River Systems
2003 Tharme, Global Perspective on Environmental Flow Assessment Emerging Trends
​1997 Jowett, Comparison of IS Flow Approaches
Channel Maintenance Flows:
​HEC-RAS 4.1 Users Manual
​2007 ODFW Guidance on Allocating Peak Flows
​Biological Flows:
2010 Poff, ELOHA a New Framework
​2009 Kendy, ELOHA Applications
HEC-RPT 2.0 Users Manual
2012 USGS, Environmental Flows Framework for the Santiam River Basin, Oregon
2010 USGS, Environmental Flows Framework for the McKenzie River Basin, Oregon
2013 Washington Dept. of Ecology, Instream Flow Study Guide
​2010 Washington Dept. of Ecology, IFIM Overview
​2009 Washington Dept. of Ecology, Instream Methods Overview
2009 Washington Dept. of Fish and Wildlife, High Flows for Fish and Wildlife
2003 Washington State, Guide to Instream Flow Setting
2001 USGS, PHABSIM Manual
​River 2D
2002, Steffler and Blackburn, River 2D Users Manual
Undated Payne and Jowett, SEFA Overview
​Other States and Countries -
​2013 Canada Science Advisory Sec - DFO
​2012 MA SWMI Framework Summary
2012 MA SWMI Framework Appendices
2012 CT Summary Streamflow Regulations
​2012 Nine Case Studies - Practical Guide
2011 Hamilton and Seelbach - MI - SR55
​2011 Alberta
2010 Hamilton and Seelbach - MI
​2010 State of California, Policy for Maintaining Instream Flows in Northern California Coastal Streams
​2009 CDM WFET Pilot Report - Full
2009 MI State - WQ60
2009 World Bank Env Flows
2008 State of Texas, Texas Instream Flow Studies
2003 British Columbia - Instream Thresholds
2001 Yakima - Cottonwoods
2007 Yakima - Cottonwoods
​1997 Missouri River - Cottonwoods
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