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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />2465 <br /> <br />Colorado River drainage basin and range in elevation from about 4,800 <br />feet to over 9,000 feet. Existing irrigated areas, however, are on <br />lands within or adjacent to the river valleys lying at elevations <br />between 5,500 and 7,500 feet. <br /> <br />Climatic data for this area are somewhat limited. <br /> <br />U.S. Weather <br /> <br />Bureau stations generally record only temperature and precipi- <br /> <br />tation. Additional data have been collected, however, at the <br /> <br />University of New Mexico Agricultural Experiment station at <br />Farmington and by other agencies in support of various projects. <br />Table A-l.l is a temperature and precipitation summary for several <br />stations in the project area. Additional parameters are identified <br />in the section on consumptive use calculations for the project area. <br /> <br />1.1.3 Definition of Terms <br />Consumptive use and evapotranspiration are used synonymously in this <br /> <br />report. Definitions of the more common terms used in determining <br /> <br />irrigation water requirements are contained in Appendix A-1.l. <br /> <br />1.2 CURRENT RESEARCH <br /> <br />Several agencies are conducting irrigation research in the four <br /> <br />corners area. This section is a brief review of current research <br /> <br />efforts in this area and a summary of the major published documents <br /> <br />used in the preparation of this report. <br /> <br />1- 2 <br />