Laserfiche WebLink
TABLE 1 <br />EVALUATION OF MODELS EXCLUDED <br />FROM CONSIDERATION (Continued) <br />5. Type of method CIR is estimated (this CIR = ET - Eff Rain CIR not calculatedCIR = ET - Eff <br />used to determine is not a CIR model) or TR-21 method Rainfall + on farm <br />CIR. irrigation losses <br />6. Data required in crop phenology, soil return flow nonesoil properties, <br />addition to the data data, and crop distribution, rainfall, growing <br />requirements listed in acreage irrigation efficiency, season data, crop <br />Table 1. crop acreage, and phenological data, <br />crop phenological irrigation interval <br />data <br />7. Availability of goodfair goodgood <br />required data <br />(exclusive of weather <br />data) in the area <br />being considered. <br />8. Can crop yesyesnoyes <br />coefficients be added <br />or changed? <br />9. Are crop meanmonthly for SCS not includedmean <br />coefficients basal or Blaney-Criddle and <br />mean coefficients? mean for Jensen- <br />Haise <br />10. Can the model no, it uses bulk nonoyes <br />accurately estimate estimating <br />ET of alfalfa and <br />meadow grass? <br />11. The method and no methodsno methodsno methodsno methods <br />accuracy of <br />estimation techniques <br />for missing data. <br />12. Can the mode be poorgoodgood-fairgood-fair <br />locally calibrated? <br />13. Usability in the fairgood good-fairgood-fair <br />entire CRDSS area? <br />14. Does the model nonono <br />have a stress <br />component to reduce <br />ET when the water <br />supply is limited? <br />15. Methods used to no effective TR-21none <br />estimate effective precipitation were <br />precipitation. assumed <br />16. Can effective nononoyes, i.e., soil moistur e <br />precipitation in budget <br />excess of Etp be <br />carried over to the <br />next month? <br />3 <br />A275 01.09.95 1.14-4 CSU IDS <br />