Assign Annual Demand

for a Purpose

CALSIM Simulation

Compare the Long-term

Average Annual Friant Unit Delivery to Benchmark Study

CALSIM Simulation Completed

Increased

IncreaseAnnual Demand

Decrease Annual Demand

Decreased

Same

Single Purpose AnalysisSingle Purpose AnalysisIterative Process for Single Purposes – WQ and RFIterative Process for Single Purposes – WQ and RF

Single Purpose AnalysisSingle Purpose AnalysisMillerton Lake Water Budget ComponentsMillerton Lake Water Budget Components

Available Storage

Forecasted Inflow

Available Water

NOT TO SCALE

River Loss

Available Water

for Canal Delivery

Allocation

Canal LossEvaporation

WQ DemandRF Demand

Rain Flood Release

Annual Reservoir

Dynamic allocated based on

hydrologic conditions

and reservoir storage

D/S Water Rights

Prescribed based on constant or

year-type varying demand patterns

Multi-Purpose Analysis Multi-Purpose Analysis Millerton LakeMillerton Lake Water Budget ComponentsWater Budget Components

Available Storage

Forecasted Inflow

River Loss

Available Water

for Canal Delivery

Allocation

Canal LossEvaporation

WQ DemandRF Demand

Rain Flood Release

Annual ReservoirAvailable Water

River Loss

Available Water

for Canal Delivery

Allocation

Canal LossEvaporation

WQ DemandRF Demand

Rain Flood Release

Reservoir with Carryover Storage

Carryover Requirement

NOT TO SCALE

Dynamic allocated based on

hydrologic conditions

and reservoir storage

D/S Water Rights D/S Water Rights

Initial Evaluation Approach for USJRBSI, Phase Initial Evaluation Approach for USJRBSI, Phase 11

Friant Enlargement ConceptFriant Enlargement Concept– Evaluation scenario only – not an alternativeEvaluation scenario only – not an alternative

Increase Millerton Lake by 700 TAFIncrease Millerton Lake by 700 TAF Simulate operations with additional storageSimulate operations with additional storage Identify how problems and opportunities could be addressed. Identify how problems and opportunities could be addressed. Use results to guide definition of “Functional Equivalence”Use results to guide definition of “Functional Equivalence”

Initial Modeling AssumptionsInitial Modeling Assumptions– Based on existing conditions and honoring current laws, Based on existing conditions and honoring current laws,

rules, and regulations. rules, and regulations.

Initial analysis Initial analysis – Identify the potential water that could be available from a Friant Identify the potential water that could be available from a Friant

enlargement to address a single problem areaenlargement to address a single problem area Water quality, supply reliability, or restorationWater quality, supply reliability, or restoration

– Identify how other problems and opportunities could be affectedIdentify how other problems and opportunities could be affected Water qualityWater quality River restorationRiver restoration Water supply reliabilityWater supply reliability Flood controlFlood control HydropowerHydropower Delta inflowDelta inflow

Initial Evaluation Approach for USJRBSI, Phase Initial Evaluation Approach for USJRBSI, Phase 1 1 Single Purpose Analysis ApproachSingle Purpose Analysis Approach

Initial Evaluation ApproachInitial Evaluation ApproachSingle Purpose AnalysisSingle Purpose Analysis

Single Purpose Analysis – Operate to address one Single Purpose Analysis – Operate to address one goal onlygoal only– Single Purpose - Water Supply (WS)Single Purpose - Water Supply (WS)

– Single Purpose - Water Quality (WQ)Single Purpose - Water Quality (WQ)

– Single Purpose - Restoration Flow (RF)Single Purpose - Restoration Flow (RF)

– Same water supply allocation logicSame water supply allocation logic

– Maximize the annual water supply to each purpose while Maximize the annual water supply to each purpose while maintaining long-term annual total delivery. maintaining long-term annual total delivery.

Single Purpose Analysis (Preliminary Assumptions) Single Purpose Analysis (Preliminary Assumptions)

ScenariosScenariosScenarioScenario Friant Unit DeliveryFriant Unit Delivery Water Quality Water Quality

Demand Demand Restoration Flow Restoration Flow

Demand Demand

BenchmarkBenchmark Allocations based on Allocations based on a 520 TAF storagea 520 TAF storage

NoNo NoNo

Single Purpose – WSSingle Purpose – WS Allocations based on Allocations based on a 1,220 TAF storagea 1,220 TAF storage

NoNo NoNo

Single Purpose – WQSingle Purpose – WQ Constrained by Constrained by Average annual total Average annual total delivery from delivery from Benchmark StudyBenchmark Study

Maximized Annual DeMaximized Annual Demand by an Iterative Pmand by an Iterative Processrocess

NoNo

Single Purpose – RFSingle Purpose – RF Constrained by Constrained by Average annual total Average annual total delivery from delivery from Benchmark StudyBenchmark Study

NoNo Maximized Annual DeMaximized Annual Demand by an Iterative Pmand by an Iterative Processrocess

Single Purpose Analysis (Preliminary Assumptions)Single Purpose Analysis (Preliminary Assumptions)Demand DevelopmentDemand Development

CALSIMCALSIM Impact Impact EvaluationEvaluation

Initial Initial (preliminary)(preliminary)

YesYes ConstantConstant CompleteComplete OngoingOngoing YesYes

Demand Development for Single Purposes – WQ and RF

Phase of Phase of Demand Pattern Demand Pattern

DevelopmentDevelopment

StatusAnnual Annual Demand Demand

Needed for Needed for Single Purpose Single Purpose

Analysis ?Analysis ?

Operating Operating Friant as an Friant as an

Annual Annual Reservoir?Reservoir?

RefinedRefined YesYes Variable by Variable by year typeyear type

OngoingOngoing – – YesYes

FutureFuture UndecidedUndecided DynamicDynamic Not in Not in Phase 1Phase 1

Not in Not in Phase 1Phase 1

NoNo

Single Purpose Analysis (Preliminary Results) Single Purpose Analysis (Preliminary Results) Summary ofSummary of CALSIM ResultsCALSIM Results

Water SupplyWater Supply Water QualityWater Quality Restoration Flow Restoration Flow

BenchmarkBenchmark 1,2421,242 00 00

Single Purpose Single Purpose – WS– WS

1,3761,376

i.e.,i.e., + 134 + 134 at Friant Damat Friant Dam

00 00

Single Purpose Single Purpose – WQ– WQ

1,2491,249 102 102 at Mendota Pool at Mendota Pool distributed uniformly in distributed uniformly in July through September.July through September.

i.e.,i.e., + 138 + 138 at Friant Dam at Friant Dam

00

Single Purpose Single Purpose – RF– RF

1,2451,245 00 8080 at Mendota Pool at Mendota Pool distributed in distributed in unimpaired flow unimpaired flow monthly patternmonthly pattern

i.e.,i.e., + 152 + 152 at Friant Damat Friant Dam

ScenarioAverage Annual Water Allocations for Each Purpose (TAF)

Single Purpose Analysis (Preliminary Results) Single Purpose Analysis (Preliminary Results) Annual AverageAnnual Average Friant UnitFriant Unit DeliveryDelivery

ScenarioScenario

Class 1Class 1 Class 2Class 2 215 Water215 Water TotalTotal

BenchmarkBenchmark 745745( 0 )( 0 )

352352( 0 )( 0 )

145145( 0 )( 0 )

1,2421,242( 0 )( 0 )

Single Purpose – WSSingle Purpose – WS 758758

( 13 )( 13 )

570570

( 218 )( 218 )

4848

( - 97 )( - 97 )

1,3761,376

( ( 134134 ) )

Single Purpose – WQSingle Purpose – WQ 728728

( - 17 )( - 17 )

476476

( 124 )( 124 )

4444

( - 101 ) ( - 101 )

1,2491,249

( ( 77 ) )

Single Purpose – RFSingle Purpose – RF 725725

( - 20 )( - 20 )

477477

( 125 )( 125 )

4444

( - 101 )( - 101 )

1,2451,245

( ( 33 ) )

Delivery in TAF (Difference from Benchmark)

Single Purpose AnalysisSingle Purpose AnalysisNext StepsNext Steps

Introduce year-type dependent demands for water quality and Introduce year-type dependent demands for water quality and restoration flow; Options includerestoration flow; Options include– Annual quantity based on predetermined proportionAnnual quantity based on predetermined proportion

Benchmark Study water delivery amounts by year typeBenchmark Study water delivery amounts by year type Unimpaired flow amounts by year typeUnimpaired flow amounts by year type Option to include reductions in a multi-year drought Option to include reductions in a multi-year drought

– Refine approach to preserve long-term average deliveryRefine approach to preserve long-term average delivery Annual average deliveries by year typeAnnual average deliveries by year type Water supply reliability similar to that of the Benchmark StudyWater supply reliability similar to that of the Benchmark Study

Develop guidelines for evaluating impacts Develop guidelines for evaluating impacts – Ecosystem, water quality, water delivery, economics, etc.Ecosystem, water quality, water delivery, economics, etc.