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Agricultural Water Use <br />29 <br />Agricultural Demand Terminology <br />Demand <br />Demand <br />Terminology / Definition <br />Terminology / Definition <br />Units <br />Units <br />Gross Agricultural Total water supply required from a source (such as a <br />Diversion (AF) river or groundwater aquifer) to meet an irrigation <br />water requirement. <br />Consumptive Use That portion of the water demand that is consumed <br />(percent or AF) and does not return to the stream system through <br />return flow <br />Irrigation Water On - farm crop consumptive use demand (estimated by <br />Requirement (IWR) Blaney - Criddle, etc.). State CU, a DSS Tool, estimates <br />(depth or AF/Acre) IWR. <br />Water Supply Limited On - farm consumptive use as limited by the availability <br />(WSL) Demand of water (amount and timing). Requires data on <br />(AF/Acre) timing of water deliveries <br />Gross Diversion > Irrigation Water Requirement > Water Supply Li mited <br />30 <br />15 <br />