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<br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />(.)661 <br /> <br />57. Irrigation water s!::EP.:!:l. - The flow of the Purgatoire HiveI' in <br />the project area consists of the relatively low base flow, the early <br />sprinG runoff from sn01oJ-melt and flood flo,rs from intense swamer stonns. <br />A study of stream flow records shoHS the a.verage annual discharg€) at <br />Trinidad, for the period selected for study of the irrigation supply, <br />1925 to 1949, to be 65,100 acre-feet. Of this flow, an average of <br />54,000 acre-feet annually has been diverted for irrigation use in the <br />project area. In addition to this supply, an average of about 500 acre- <br />feet has been diverted annually 1:>y the liodel irrigation system, from <br />Cl1icosa Creek and other small arroyos. <br />58. Irrigation water requirements. - From an analysis of crop irri- <br />gation requirements by the Bureau of Reclamation, considering temperatures <br />and amounts of precipitation prevailing during the period 1925 ~o 1949 <br />in the project area, it is estimated that the average conswnptive use of <br />,rater for irrigation would amount to 1.42 acre-feet annually. In addi- <br />tion, unavoidable water losses on the farm and reasonable canal and <br />lateral losses would increase the diversion requirement to a total of <br />about 2.90 acre-feet per acre. Using this w1it the total diverDi.on re- <br />quirement for the 19,500 acres in the project area would be about <br />56,500 acre-feet annually. For optimum crop production the monthly <br />distribution of the total diversion requirement' in acre-feet through the <br />growing season is estimated as follows: April 0.27, 11ay 0.52, June 0.55, <br />July 0.53, August 0.50, September 0.34, and October 0.19, or a total of <br />2.90 for the gro.o1ing season. Although the average annual estimated <br />diversion requirement and the average annual historical diversions to <br />the project area are about the same in total amount, there is a wide <br />variation from year to year and month to month from the estimated re- <br />quirement for optimum crop production. <br />59. \Vater righ ts. - Stream flow rec ords at Trinidad renec t the <br />historical diversion of water upstream from the project area, and no <br /> <br />22 <br /> <br />J~~R... <br /> <br />