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Irrigation Calculations for Reclaimed Irrigated Pasture (shares/acre) <br />Knowns: Unknowns: <br />2007 irrigation volume = 602.3 ac-ft 2007 irrigation rate = shares/acre <br />2007 irrigated area = 242 acres 2008 irrigation rate = shares/acre <br />2007 CCC ditch flow = 99.0 cfs <br />2008 irrigation volume = 608.1 ac-ft <br />2008 irrigated area = 257 acres <br />2008 CCC ditch flow = 101.5 cfs <br />Irrigation season length = 21.8 weeks <br />CCC ditch shares = 3250 <br />2007 Calculations <br />Average flow rate of irrigation water for 2007 season: <br />602.3ac * ft ( lseason ) (lweek )12in 450gpm 0.002cfs = 2.48 cfs <br />lseason I \ 21.86weeks ) I \ 120hrs /I I ft lac * ft / in lgpm <br />Shares per cfs for 2007 season: <br />3250shares <br />99.Oc = 32.8shares / cfs (2) <br />fs <br />Applying (2) to (1) gives the shares used to irrigate in 2007: <br />2.48cfs 32.8shares = 81.41shares (3) <br />lcfs <br />Based on (3), calculate the 2007 irrigation: <br />81.41shares <br />= 0.34shares / acre <br />242acre <br />(1) <br />