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<br />OtllG06 <br /> <br />HYDROLOGIC MODELS INVENTORY <br /> <br />EVALUATJ:ON FORM <br /> <br />NAMJI: OF MODEL: XCIR <br /> <br />FUNCTION: Estimates monthly evapotranspiration using the Jensen-Baise method. <br />(1970 Jensen-Haise Procedure) <br /> <br />AGENCY & OFFICE: USBR - Denver Office - Water Resources Section <br /> <br />TECHNICAL CONTACT: Eldon Johns (D5752) 303-236-3810 <br />FTS 776-3810 <br /> <br />MACHINE COMPATIBILITY: CDC Cyber Computer System <br /> <br />DOCUMENTATION: Documentation available in the computer file XCIRDOC but is <br />incomplete. <br /> <br />SPATIAL PRECISION: Point estimates based on weather station locations. <br /> <br />TEMPORAL PRECISION: Monthly <br /> <br />OVERVIEW OF CAPABILITIES, ASSUMPTIONS: Allows computations by Jensen-Haise <br />method with and without elevation correction. <br /> <br />STRENGTHS: Well tested and generally technically sound. <br /> <br />WEAKNESSES: An old program which has undergone extensive modification. The <br />Jensen-Haise method should be used with caution in high altitude areas where <br />it tends to overe~timate evapotranspiration. <br /> <br />INPUT REQUIREMENTS: Climate and related data including temperature, solar <br />radiation, precipitation and crop phenology data. <br /> <br />OUTPUT PRODUCED: Monthly evapotranspiration estimates for individual and <br />weighted agricultural crops, effective precipitation is computed using the <br />USBR MethOd, and crop irrigation requirements (net irrigation requirements) . <br /> <br />1-8 <br />