Hydrologic Engineering Center HEC-ResSim HEC-ResSim Enhancements Enhancements Better Tools to Simulate the Operation Better Tools to Simulate the Operation of California Reservoirs of California Reservoirs Joan Klipsch CWEMF Annual Meeting February 2007
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Hydrologic Engineering Center HEC-ResSim Enhancements Better Tools to Simulate the Operation of California Reservoirs Joan Klipsch CWEMF Annual Meeting.
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Hydrologic Engineering Center
HEC-ResSimHEC-ResSimEnhancementsEnhancements
Better Tools to Simulate the Operation Better Tools to Simulate the Operation of California Reservoirsof California Reservoirs
Joan KlipschCWEMF Annual Meeting
February 2007
Hydrologic Engineering Center
OutlineOutline
• HEC-ResSim Basics– Development Objectives– The System Schematic– Rule-Base Operations Definition– New Features in Version 3.0
• The Yuba-Feather F-CO Study– Participants– Objective– MOA– Requested Enhancements for Version 3.1
Hydrologic Engineering Center
ResSim Development GoalsResSim Development Goals
• Represent the physical system as realistically as possible.
• Reproduce the decision making process that reservoir operators use to set releases.
• Support Multi-Purpose Operation Schemes– Represent both Flood Control Constraints &
Conservation Goals– Support low flow & drought operation– Support environmental restoration investigations
• RulesA rule is an objective for, or constraint on, the
operation of a reservoir or system of reservoirs. Rule Types:– Flexible Local & Downstream Flow Objectives– Release or Pool Elevation Rates of Change– Emergency Gate Regulation & Induced Surcharge– Local and System Hydropower Requirements– Tandem Operation– Pump-back Schedule – User-scripted rules
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Zone-Based Prioritized Rule SetZone-Based Prioritized Rule Set
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Basic Decision LogicBasic Decision Logic
1. Determine the… Allowable Range of Releases
– Physical Capacity defines the initial range
– Rules narrow the range
2. Determine the… Desired Guide Curve Release
– How much the reservoir should store or release to get back to guide curve in this timestep
Contingency Percentage as a function of Cumulative LocalFlow
New - Contingency FactorNew - Contingency Factor
• Effective space at the downstream control location is computed as the difference between the downstream limit modified by the contingency percentage and the cumulative local flow.
• For a downstream maximum flow rule, the downstream limit is multiplied by (1 – contingency percentage/100), resulting in a reduced maximum limit.
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Contingency FactorContingency Factor
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New - Inflow MultipliersNew - Inflow Multipliers
Inflow MultipliersInflow Multipliers
CancelApplyOk
Global Multiplier
Multipliers by Location
1
The Inflow Mulitplier(s) will be applied to each inflow time series to increase or decrease the entering flows.
VillanovaRockville
River PointeGreenfield
Crazy Mt. Inflow JCTBethesdaJunction
Villanova Local InflowRockville Local Inflow
River Pointe Local InflowGreenfield Local InflowCrazy Mt. Local InflowBethesda Local Inflow