From The Public Policy Institute of California (PPIC) – A variety of supply sources and methods are used to intentionally recharge aquifers. Common methods include filling dedicated recharge basins or ponds, directing water to unlined canals and riverbeds, injecting water through wells, and using extra surface water (when available) to avoid pumping (“in-lieu recharge”). There is also growing interest in recharging aquifers by applying extra irrigation water to croplands, or by spreading water on fallowed fields and natural landscapes. Supply sources include local floodwaters, surface water imported from other regions, and recycled water. (more)