Important findings of this study include:
- The estimated potential new water from agricultural water use efficiency is 1.3% of the current amount used by the state’s farmers – about 330,000 acre‐feet per year.
- Groundwater overdraft of about 2 million acre‐feet per year continues to be a serious problem in certain regions of California because of inconsistent and uncertain surface water supplies.
- Changes in irrigation practices, such as switching from flood irrigation to drip, have the effect of rerouting flows within a region (or basin), but generally do not create new water outside of the basin.
- Previous reallocations of agricultural water supplies for environmental purposes represent at least 5% of farm water diversions depending on water year.
- On‐farm water conservation efforts can affect downstream water distribution patterns, with potential impacts on plants and animals, recreation, as well as human and industrial consumptive uses.