The 1995 population of the Sacramento Valley was 2.4 million (California Department of Water Resources, 2003).
Sutter Buttes, a volcanic remnant in the south-central part of the Sacramento Valley, and the Sacramento, Feather, Yuba, Bear, and American Rivers
The Sacramento Valley has mild winters and hot, dry summers.
The natural levees that border the Sacramento-Feather River system create backwater basins of heavy clay soils that sustain rice farms and duck clubs. Truck, field, orchard, and rice crops are grown on approximately 2.1 million acres; rice represents about 23% of the total acreage (California Department of Water Resources, 2003).
Depending on location, agriculture in the Sacramento Valley relies on a variable combination of surface water and groundwater. Groundwater accounts for less than 30% of the annual supply used for agricultural and urban purposes in this area. The Sacramento Valley, generally rich in surface water, provides water for much of California's urban and agricultural needs (California Department of Water Resources, 2003).