A Climate Driven Model of the Water Resources of The Sacramento and San Joaquin Hydrologic Regions: Model Structure and Data Inputs

Brian Joyce, Stockholm Environment Institute

Brian.Joyce@sei-us.org(530) 220-2111

• Supported by California Department of Water Resources

• In Collaboration with:

– David Yates

• National Center for Atmospheric Research

– David Groves

• RAND Corporation

– Andy Draper

• Montgomery-Watson-Harza

Sacramento/San Joaquin Valley WEAP Model

San Joaquin Hydrologic Region

Sacramento RiverHydrologic Region

Trinity River

Bay-Delta

Westside Tulare Basin

M&I/ Environ. Demand

Rivers and TributariesInter-Basin Transfer

Interactive Groundwater

Irrigated Agriculture

ReservoirCanals and Diversions

Instream Flow Requirement

M&I/ Environ. Demand

Rivers and TributariesInter-Basin Transfer

Interactive Groundwater

Irrigated Agriculture

ReservoirCanals and Diversions

Instream Flow Requirement

Pit

Cow

BattleCotton-Wood

Shasta

Trinity

Clear

Oroville

Upper Feather

Almanor

Yo

lo

Byp

ass

Te

ha

ma

-Colu

sa

Chico

ButteS

utte

r Byp

ass

Thomes

Black Butte

Gle

n-C

olu

sa

Cache

Putah

BullardsBar

Yuba

Bear

Folsom

Coon

South Fk American

North Fk American

Sacramento Weir

Feather

Upper Pit

McCloud

1

Sacram

ento

DeltaOutflow

Stanislaus

San Luis

San Joaquin

Fresno Slough/ James Bypass(prescribed)

California A

queductD

elta Mendota C

anal

Berryessa

Camp Far West

Cosumnes

Mokelumne

Calaveras

Tuolumne

Merced

San Joaquin

Chowchilla Fresno

Friant -K

ern

Madera

Eastside

Bypass

Millerton

McClure

Don Pedro

New Melones

New Hogan

Pardee

Pit

Cow

BattleCotton-Wood

Shasta

Trinity

Clear

Oroville

Upper Feather

Almanor

Yo

lo

Byp

ass

Te

ha

ma

-Colu

sa

Chico

ButteS

utte

r Byp

ass

Thomes

Black Butte

Gle

n-C

olu

sa

Cache

Putah

BullardsBar

Yuba

Bear

Folsom

Coon

South Fk American

North Fk American

Sacramento Weir

Feather

Upper Pit

McCloud

1

Sacram

ento

DeltaOutflow

Stanislaus

San Luis

San Joaquin

Fresno Slough/ James Bypass(prescribed)

California A

queductD

elta Mendota C

anal

Berryessa

Camp Far West

Cosumnes

Mokelumne

Calaveras

Tuolumne

Merced

San Joaquin

Chowchilla Fresno

Friant -K

ern

Madera

Eastside

Bypass

Millerton

McClure

Don Pedro

New Melones

New Hogan

Pardee

M&I/ Environ. Demand

Rivers and TributariesInter-Basin Transfer

Interactive Groundwater

Irrigated Agriculture

ReservoirCanals and Diversions

Instream Flow Requirement

M&I/ Environ. Demand

Rivers and TributariesInter-Basin Transfer

Interactive Groundwater

Irrigated Agriculture

ReservoirCanals and Diversions

Instream Flow Requirement

Pit

Cow

BattleCotton-Wood

Shasta

Trinity

Clear

Oroville

Upper Feather

Almanor

Yo

lo

Byp

ass

Te

ha

ma

-Colu

sa

Chico

Butte

Su

tter B

ypass

Thomes

Black Butte

Gle

n-C

olu

sa

Cache

Putah

BullardsBar

Yuba

Bear

Folsom

Coon

South Fk American

North Fk American

Sacramento Weir

Feather

Upper Pit

McCloud

1

Sacram

ento

DeltaOutflow

Stanislaus

San Luis

San Joaquin

Fresno Slough/ James Bypass(prescribed)

California A

queductD

elta Mendota C

anal

Berryessa

Camp Far West

Cosumnes

Mokelumne

Calaveras

Tuolumne

Merced

San Joaquin

Chowchilla Fresno

Friant-K

ern

Madera

Eastside

Bypass

Millerton

McClure

Don Pedro

New Melones

New Hogan

Pardee

Pit

Cow

BattleCotton-Wood

Shasta

Trinity

Clear

Oroville

Upper Feather

Almanor

Yo

lo

Byp

ass

Te

ha

ma

-Colu

sa

Chico

Butte

Su

tter B

ypass

Thomes

Black Butte

Gle

n-C

olu

sa

Cache

Putah

BullardsBar

Yuba

Bear

Folsom

Coon

South Fk American

North Fk American

Sacramento Weir

Feather

Upper Pit

McCloud

1

Sacram

ento

DeltaOutflow

Stanislaus

San Luis

San Joaquin

Fresno Slough/ James Bypass(prescribed)

California A

queductD

elta Mendota C

anal

Berryessa

Camp Far West

Cosumnes

Mokelumne

Calaveras

Tuolumne

Merced

San Joaquin

Chowchilla Fresno

Friant-K

ern

Madera

Eastside

Bypass

Millerton

McClure

Don Pedro

New Melones

New Hogan

Pardee

Level of Analysis• Planning Areas (PA’s)

– 11 PA’s in Sacramento River Hydrologic Region

• 4 “Rim” PA’s

• 7 “Valley” PA’s

– 10 PA’s in San Joaquin Hydrologic Region

• 4 “Rim” PA’s

• 6 “Valley” PA’s

– Also include 1 “Valley” PA in the Tulare Lake Hydrologic Region 702

508

501

504

502

506

505

507

503

509511

510

604

610609

603602

607

608

606605

601

605

Watersheds

• Sacramento Hydrologic Region– 4 “Rim” Planning Areas

• 15 Watersheds

• San Joaquin Hydrologic Region– 4 “Rim” Planning Areas

• 11 Watersheds

• North Coast Hydrologic Region– 1 “Rim” Detailed Analysis Unit

• 1 Watershed

Pitt River

Feather River

Yuba RiverBear RiverAmerican RiverCosumnes River

Merced River

Mokelumne RiverStanislaus RiverTuolumne River

Trinity River

Stony Creek

Cache Creek

Putah Creek

San Joaquin River

Thomes/Elder Creek

Pitt River

Feather River

Yuba RiverBear RiverAmerican RiverCosumnes River

Merced River

Mokelumne RiverStanislaus RiverTuolumne River

Trinity River

Stony Creek

Cache Creek

Putah Creek

San Joaquin River

Thomes/Elder Creek

Pitt River

Feather River

Yuba RiverBear RiverAmerican RiverCosumnes River

Merced River

Mokelumne RiverStanislaus RiverTuolumne River

Trinity River

Stony Creek

Cache Creek

Putah Creek

San Joaquin River

Thomes/Elder Creek

500 m Elevation Bands

Two-Bucket Approach

Land Use Classification

• Hydrology module is applied for each land class within a catchment object

• Estimates streamflow, as well as snow accumulation/melt

Irrigation and Refuge Demands

• Sacramento River Hydrologic Region– 7 “Valley” PA’s

• 9 Agricultural Demand Areas

• 8 Managed Wetlands

• San Joaquin Hydrologic Region– 6 “Valley” PA’s

• 9 Agricultural Demand Areas

• 2 Managed Wetlands

• Tulare Lake Hydrologic Region– 1 “Valley” PA

• 1 Agricultural Demand Area

• 0 Managed Wetlands

Land Use Based Demands

Irrigated Areas

• Hydrology module estimates irrigation demands for 20 crop types

– Input requirements: Crop schedule, Kc, Rooting depth, Soils data

• Also, estimates water demand for Outdoor Urban

– Input requirements: same as crops

Managed Wetlands

• Wetlands use same catchment object and hydrology routine as irrigated areas.

• Also includes “ponding” and “flow through” requirements

Urban Indoor Demands

Urban Indoor

• Single Family and Multi Family demands estimated as function of water use per household

• Industrial and Commercial demands estimated as a function of water use per employee

System Operations

• Reservoir releases and water deliveries “operated” using

– Storage Priorities

– Storage Buffers

– Supply Preferences

– Transmission Constraints

Priority = 17

Priority = 15Preference = 3

Preference = 1

Preference = 1

Limit = 50% Demand

Limit = 40% DemandLimit = 100% Demand

System Operations

• In-Stream Flow Requirements (IFR) are treated as demand objects. Assigned priorities relative to agricultural and urban water demands.

• 21 IFR’s in model. Includes AFRP, Delta Outflow, and others

System Operations

Sacramento-San Joaquin Delta

• Water quality considerations:

– Use GMOD for Delta salinity standards

– Use Kimmerer-Monismith to estimate required net Delta outflow to maintain X2

• Delta exports

– Constrained by VAMP, E/I Ratio

– Target San Luis filling Sep-Mar

Questions

Brian JoyceStockholm Environment Institute

Brian.joyce@sei-us.org(530) 220-2111