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HISTORIC RAIN, YET DROUGHT REMAINS <br />GLOSSARY <br />Acre-feet <br />The unit of volume typically used to describe the quantity of water stored in large <br />reservoirs and aquifers and delivered through large conveyance systems for irrigation <br />use and for treating for public use. An acre-foot is one surface acre that is one foot deep <br />and is equal to 325,851 gallons. <br />Aquifer <br />An underground layer or body of permeable rock, sediment, or soil that can store and <br />yields water. Orange County has a large aquifer underlying North and Central County. <br />California State Water Project (CSWP) <br />A multi -purpose water storage and delivery system that extends more than 705 miles <br />and includes a collection of canals, pipelines, and reservoirs to deliver water to 27 <br />million Californians, 750,000 acres of farmland, and businesses throughout the state. <br />Conjunctive Use <br />Using surface water in wet years and storing as groundwater for use in dry years. <br />Surface water is injected directly into aquifers and wells to be used as needed as part of <br />groundwater banking or is stocked in ponds or basins and then allowed to percolate <br />naturally into aquifers. <br />Desalination <br />The process of removing salt from brackish water or seawater. For the purposes of this <br />report, desalination is used primarily in terms of sea or ocean water. <br />Direct Potable Water Reuse <br />The process by which recycled wastewater is treated to a high degree suitable for potable <br />use and placed directly into potable distribution systems. California has recently created <br />regulations for direct potable water reuse. <br />Drought <br />A prolonged period of low or no rainfall that causes water scarcity and affects <br />ecosystems, agriculture, and human health. <br />ORAtq(61 1F GRAND JURY 2022 1 2023 7 — 33 11 �e 9 f 57 <br />