Making Better Decisions in an Uncertain World Reservoir Operations Modeling

Making Better Decisions in an Uncertain World

Reservoir Operations Modeling

Modeling Reservoirs

• Continuity Equation• Balance multiple objectives• Represent operational controls

Basic Processes

Evaporation

Spillway

Outlet

Seepage Sedimentation

Inflow

Reservoir

Reservoir Pools

Flood Control

Conservation

Dead Pool

SurchargeDam Freeboard

Dead Pool

• “Inactive” pool• Maintain head for hydroelectric power• Fish habitat• Sediment reserve

Conservation Pool

• Municipal & industrial supply• Irrigation• Navigation/recreation• Hydroelectric Power• Instream flow maintenance

Seasonal Conservation Pool

Surcharge

Inactive Pool

Flood Control Pool

Conservation Pool

Rese

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r Ele

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Months (Jan – Dec)

Flood Control

• Remains empty• Weir or Orifice• Downstream control• Upstream control

Surcharge

• Weir flow over spillway• Uncontrolled storage capacity• Presents risk downstream• Never overtop dam under any condition

Flood Control vs. Conservation

• Continuous balancing act• Model impacts– Policy changes– New facilities– New supplies

Questions?

Jason Lillywhite, P.E.

For a free trial version of the software, visit: www.goldsim.com