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ATTACHMENT2 Water Budget for the Howard Stein PropeRy Irrigated by the Fort Bent Canal The Howard Stein property is located in sec. 2, T. 23 S.. R. 47 W. A total of 166 shares of the Fort Bent Canal water imgated an 82-acre parcel as shown on Figure 1. No irrigation wefts were associated with this property. A water budget was prepared for an average year (1980-94) and a dry year (1981) using the modified Blaney Griddle method described in Technical Release No. 21 (published by the Soil Conservation Service in 1971) to calculate the consumptive irrigation requirements for the irrigated crops. Temperature and precipitation data were compiled for Lamar. Other factors used in the procedure were taken from 'Water Budget Documentation" by Boyle Engineering Company in 1990 and the crop distribution provided by Howard Stein. Irrigated Acreage: 82 acres Average Canal loss rate: 22.78 percent Average Ditch Lateral loss rate: 3.5 percent Average Farts Lateral loss rate: 3.5 percent Maximum fans efficiency: 65 percent Crop distribution: Alfalfa 68 acres Winter Wheat 7 acres Milo 7 acres (based on a crop rotation pattern of alfalfa 5 years and winter wheat or milo 1 year) Soil Moisture holtling capacity: 0.82 acre-foal per acre Winter soil evaporation: 3 inches Return flow distribution: Tail water. same month Ground water: monthly response factors taken from Kansas' H-I model Secondary Evaporation IMonth (S~1 November 9.9 December 8.1 January 8.7 February 12.6 March 21.3 April 29.1 May 34.8 June 42.0 July 45.3 August 38.7 September 29.4 October 20.1 B The water budget procedure accounts for all water diverted from the stream and applied for irtigation. Canal and lateral losses and deep percolation return to the Arkansas River via the ground water and tail water returns via creeks, gullies, end drainage channels. 60'd -7-d •uaswE~~t~M g uo'3LaH HOZ=Oi 00-ii--+dH