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sonomawater.ca.gov
Potter Valley ProjectHEC-ResSim Model
John MendozaChris DelaneyDon Seymour
August 29, 2018
Potter Valley Project ResSim
• 7 Model Junctions1. Lake Pillsbury2. Scott Dam3. Van Arsdale Reservoir4. Cape Horn Dam5. Downstream of Cape Horn Dam6. Potter Valley Powerhouse7. East Fork of Russian River
• 3 Potential Added Locations8. Below Tomki Creek9. Below Outlet Creek10. Below Middle Fork Eel
Potter Valley Project ResSim• Hydrology
Ø Western HydrologicsØ 108-years:
§ 1910 – 2017
• Lake Pillsbury StorageØ 2016 PG&E Bathymetric Survey
• Current PVP OperationsØ 2004 RPAØ Block Water
§ Based on 2017§ After May 1 release blockwater if
flows below CHD < 250 cfs
Ø Discretionary diversions§ Storage > Target Storage Curve§ Simulates current operational
practices
Ø Gate closure§ Gate closure model logic based on
inflow into Lake Pillsbury
Potter Valley Project ResSim
Potter Valley Project ResSim
Model Validation Results
Model Validation Results
Modeled calculated gate closure start date: March 16
Observed gate closure start date: March 24
Model Validation Results
Model Validation Results
Model Validation Results
Summary Metrics Template• Daily Average & Probability Exceedance of
Flow & Storage Time Series
Summary Metrics TemplateExisting S1 S2 S3 S4 S5
Unimpair
ed
Historical
Gage S1 S2 S3 S4 S5 Unimpaired
Historical
Gage
Storage % % % % % % %
Lake Pillsbury % % % % % % %
Average % % % % % % %
EOS % % % % % % %
Min/Max (Std Dev) % % % % % % %
Lake Mendocino % % % % % % %
Average % % % % % % %
EOS % % % % % % %
Min/Max (Std Dev) % % % % % % %
Flows % % % % % % %
Eel River % % % % % % %
Below Scott Dam % % % % % % %
Jun-Sep Avg % % % % % % %
Jun-Sep Min/Max (Std Dev) % % % % % % %
Water Year Avg % % % % % % %
Water Year Min/Max (Std Dev) % % % % % % %
Above Cape Horn Dam % % % % % % %
Jun-Sep Avg % % % % % % %
Jun-Sep Min/Max (Std Dev) % % % % % % %
Water Year Avg % % % % % % %
Water Year Min/Max (Std Dev) % % % % % % %
Below Tomki Creek % % % % % % %
Jun-Sep Avg % % % % % % %
Jun-Sep Min/Max (Std Dev) % % % % % % %
Water Year Avg % % % % % % %
Water Year Min/Max (Std Dev) % % % % % % %
Below Middle Fork Eel % % % % % % %
Jun-Sep Avg % % % % % % %
Jun-Sep Min/Max (Std Dev) % % % % % % %
Water Year Avg % % % % % % %
Water Year Min/Max (Std Dev) % % % % % % %
East Fork Russian River % % % % % % %
PV Powerhouse % % % % % % %
Jun-Sep Avg % % % % % % %
Jun-Sep Min/Max (Std Dev) % % % % % % %
Water Year Avg % % % % % % %
Water Year Min/Max (Std Dev) % % % % % % %
Above Lake Mendocino % % % % % % %
Jun-Sep Avg % % % % % % %
Jun-Sep Min/Max (Std Dev) % % % % % % %
Water Year Avg % % % % % % %
Water Year Min/Max (Std Dev) % % % % % % %
Evaluation
Metric (AF) Model Junction/Value
Model Scenario Other Percent Change From Existing Condition Scenario
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