Laserfiche WebLink
<br />. . : of:.\". I <br /> <br />~~'~~;'4N <br /> <br />3. Private water users seldom measure water diversions or <br /> <br />application rates for irrigation. Estimating four years of <br />use would be difficult. <br /> <br />B. Difficulty in Documenting Water Consumption <br /> <br />1. Oregon State University has produced good regional <br /> <br /> <br />guidelines for irrigation crop requirements. These <br /> <br /> <br />guidelines are based on fixed assumptions of <br /> <br /> <br />evaporation and transpiration losses. It is more difficult <br /> <br /> <br />to find references for predicting differences in <br /> <br /> <br />evaporation and transpiration based on irrigation <br /> <br /> <br />systems. <br /> <br />2. Accurate assessment of water consumption requires <br />knowledge of the entire irrigation or water use system, <br />the amount diverted, the return flow, the climate, and <br />the vegetation receiving water (crop and non-crop). <br /> <br />C. Little Water is Irretrievably Lost <br /> <br />1. Although "irretrievably lost" was not defined in the law, <br /> <br /> <br />it was assumed to include waters lost through <br /> <br /> <br />evaporation, percolation to deep aquifers and movement <br /> <br />across basin boundaries. <br /> <br />2. Clear opportunities to find water that is "irretrievably <br />lost" exist when water is transported across basin or <br />major subbasin boundaries. Water savings that occur in <br />the receiving basin were previously lost to the supplying <br />basin. <br /> <br />11 <br />