The Sacramento Regional Groundwater Model

Derrick WhiteheadRoseville City - Roseville, CA

Norm JonesAquaveo - Provo, UT

Michelle SmilowitzHeatwave Data - Miami, FLA

Project Setting

Roseville

• Local-scale issues– Aquifer storage and

recovery– Migration of

contaminants• Regional-scale issues

– Long-term demand– Water conservation

strategies– Banking and exchange

Objectives

Tools

MODFLOW

Model Domain

Bear River

Feather River

Sacramento River

Sierra Nevada

Mokelumne River

Hydrogeologic Characterization

3D Cross Sections

GeoVolumes

Model Grid Layering

Ancestral Streams

Stresses

Rivers, Streams, Canals Supply Wells

• US Army Corps of Engineers• Simulates

– 2D overland flow– 1D streamflow– 1D infiltration– Evapotranspiration– Deep percolation

Gridded Surface Subsurface Hydrologic Analysis (GSSHA)

1

2

3

45

67

Ungaged Watershe

ds

GSSHA Results

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2

3

45

67

• GIS workflow– Shape files– Tables– Time series– Geoprocessing tools

• Outputs– Summary tables– Pumping files– Recharge files– Lateral inflow files

Water Demand Model

Land Use Patterns

Master Land Use File

Change from Non-urban to Urban

Farm Data

Water Unit Demand FactorsAgricultural Demand

Factors (DWR)

Urban Demand Factors

Water Year Index 2002 ITRC Crop

Evapotranspiration Rates for Eto Zone 14

ITRC Report 02-001, funded by CALFED and Agricultural Research Initiative of California State Univ.

Model Output for Representative Water Years

Normalization Factor based on Water Year Index

Monthly Conversion Factors

Steady State Calibration

• October 2006 through September 2050• Monthly time steps• Two versions– With conservation measures– Without conservation measures

Predictive Model

The Water Conservation Act introduced by Senator Steinberg sets a goal of reducing per capita urban water use by 20% by December 31, 2020, with an intermediate goal of reducing per capita water use by at least 10% by December 31, 2015.

Aquifer Storage and Recovery

Current and Future ASR Wells

Local-Scale Model

Local-Scale Model

Sample Results

Thank You

Derrick Whiteheaddwhitehead@roseville.ca.us