The Sacramento Regional Groundwater Model Derrick Whitehead Roseville

The Sacramento Regional Groundwater Model Derrick Whitehead Roseville City - Roseville, CA Norm Jones Aquaveo - Provo, UT Michelle Smilowitz Heatwave Data - Miami, FLA

Project Setting Roseville

Objectives • Local-scale issues – Aquifer storage and recovery – Migration of contaminants • Regional-scale issues – Long-term demand – Water conservation strategies – Banking and exchange

Tools MODFLOW

Model Domain Bear River Sierra Nevada Feather River Sacramento River Mokelumne River

Hydrogeologic Characterization

3 D Cross Sections

Geo. Volumes

Model Grid Layering

Ancestral Streams

Stresses Rivers, Streams, Canals Supply Wells

Gridded Surface Subsurface Hydrologic Analysis (GSSHA) 1 Ungaged Watersheds 2 • US Army Corps of Engineers • Simulates 3 4 5 6 7 – – – 2 D overland flow 1 D streamflow 1 D infiltration Evapotranspiration Deep percolation

GSSHA Results 1 2 3 4 5 6 7

Water Demand Model • GIS workflow – – Shape files Tables Time series Geoprocessing tools • Outputs – – Summary tables Pumping files Recharge files Lateral inflow files

Land Use Patterns Master Land Use File Farm Data Change from Non-urban to Urban

Water Unit Demand Factors Agricultural Demand Factors (DWR) Urban Demand Factors Water Year Index Ø Model Output for Representative Water Years Ø Normalization Factor based on Water Year Index Monthly Conversion Factors Ø 2002 ITRC Crop Evapotranspiration Rates for Eto Zone 14 Ø ITRC Report 02 -001, funded by CALFED and Agricultural Research Initiative of California State Univ.

Steady State Calibration

Predictive Model • October 2006 through September 2050 • Monthly time steps • Two versions – With conservation measures – Without conservation measures 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 Whitehead dwhitehead@roseville. ca. us