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WATER AVAILABILITY <br />Available Flows: <br />The available flaw for water right usage is dependent on precipitation, evapo- <br />transpiration, and groundwater changes. <br />The run-off fran precipitation is dependent on both the amount and timing of pre- <br />cipitation. Urge amounts of precipitation will result in large amaints of <br />run-off. the tiriing of the precipitation also governs the amount of run-off. <br />For example, rain for several days will create more flaws due to the ground mois- <br />ture sa~raticn. 4he same amount of rain scattered between sunny days will pro- <br />duce less run-off due to lo.~red ground moisture. Also, the season in which the <br />precipitation is received will alter the run-off period. For instance, snaafall <br />does not immediately run off. <br />The type of vegetation within a specific area governs the amount of precipitation <br />• that is ecapotranspired. The water balance for Steven's Gulch shwas approximate- <br />ly 16 inches of evapotranspiration fran available precipitation. <br />Eon-off .:ata fron the continuous recording Parshall flumes is found in the <br />Hydrology appendix, Volume 4. This shows the run-off in. acre feet of the various <br />drainages . <br />Irrigation Flows: <br />Irrigation flows and subsequent diversion of streamflow is dependent on the needs <br />of the water user. L1~ring periods of high natural precipitation, less irrigatior. <br />water is recuired. ?~LCh like the evapotranspiration in various basins, ttie type <br />of crops grown will also govern the irrigation needs of agricultural crops. For <br />instance, alfalfa requires Hoch r.:ore irrigation flow than orchards. <br /> The actual water delivered to agricultural crops is dependent on the transxrta- <br /> tion losses. Losses can be experienced from leakage in t:= ditch systa~ and <br />• eva_ooratior,. TYpicaily, leakage is ruch higher thhan the evap^ratien losses. C•:I <br />