DWR_Options for PathForward_(Tarver)

DWR Presentation:
Options for a Path Forward
Fred Tarver
08-28-2012
EFSAB Charge
•Identify flows necessary to maintain ecological
integrity
•Characterize the aquatic ecology of different
river systems
OASIS Basin Model: What’s the EF?
Round 1: DWR PHabSim Sites in Basins with
OASIS Model – Habitat Response x EFS Class
Habitat Response To Flow Regimes
Based on DWR PHabSim Sites
Round 2?: DWR PHabSim Sites in Basins with No
OASIS Model + ~Data Format Issues
Round 3?: DWR PHabSim Sites in Basins with No
OASIS Model & Class + Data Format Issues & Dam Alt.
Stream What’s The EF ? Class?
Yes
Overlay
No Derive hydrologic
POR
EFS NC Streamflow
Mtn/Piedmont
vs Coastal Plain?
Upper CP vs Lower CP?
Season/Life Stage?
Drainage Area?
Slope?
EF
Process for Complexity
This is not exactly a linear process, but is often recursive. Step 1 is always first, and is usually
repeated throughout.

Together, gather information about the decision problem
Together, define the decision problem: frame the issues to be resolved
Specify what's important: specify interests and objectives
Create imaginative options
Evaluate the consequences of selecting any or all options
Grapple with trade offs
Clarify uncertainties
Make recommendations

Agree on information to collect and how gaps or disagreements among technical sources will be
handled. Allow stakeholders to build a shared understanding of technical and scientific issues and
their implications for decision-making/recommendations. The process can also help resolve
disputes about scientific and technical methods, data, findings and interpretations.

Looking Forward
October:
Thomas Payne on Pros and Cons of Habitat Modeling
Biofidelity Analysis of Stream Classes
If Biofidelity breaks down – what are next steps
How Oasis and Waterfall interact; How Waterfall can server as a preloader?
November: ?

February:
Introduce Conceptual Framework (Flow Chart)
Outstanding Flow Studies of Habitat modeling runs (what will be possible with
Oasis Model (run through). Transferability from Eno to other sites
TNC Report out on results

Additional Examinations? When?
•Implications of state/federal policy on e-flows
(Threatened and Endangered Species)
•How WaterFAll interacts with Oasis; serve as a
preloader.
•Coastal Issues
–Specific ways to address coastal issues
–Issues EFSAB will set aside (others to research)
–Justify issues set aside