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<br />Phreatophytes <br /> <br />. <br /> <br />. <br /> <br />The SCS report oa~e III-20 shows 11,015 acres of wetlands in the ;,1cElmo <br /> <br /> <br />study area. There is no breakdown ~s to how much is on, or directly associated <br /> <br /> <br />with, presently irri~ted land. However, it would seem reasonable to assume <br /> <br /> <br />that much of it is fed by irri~Tion water. Footnote g; ~f Table IV-2 in the <br /> <br /> <br />SCS reoort (the water bud~et) reco~izes the consumotive use of ohreatophyti~ <br /> <br /> <br />vegetation and that irri~tion runoff, deep oercolation and ditch seepage are <br /> <br /> <br />orimary sources of water for such ve<;etation. Therefore, the runoff and seePll"(e <br /> <br /> <br />water indicated in the table will really be of a lessor amount hecause of this <br /> <br /> <br />use which was not quantified. <br /> <br />The USBR report, ca<;e 49, Table 12, does not reco~ize ohreatophyte use <br />of diverted >~ter. However, Fi~e 10 acknowled~es 172,700 ac. ft. of other <br />consumptive use which is assumed to include ohreatophytes. And, since diversions <br />are only shown as 105,200 ac. ft., much must be assumed ':0 come from the <br />precipitation increment. The Attachment 6 explanation column headin~s (oage 148) <br />states that Column 23 is that cart of the tailwater runoff consumptively used <br />by phreatoohytes which equals 4660 aCt ft. for the preproject (present) condition. <br />An old USBR computation sheet obtained from SCS shO'$ 10,000 acres of phreatonhytes <br />usin~ 4 ac. ft. per aCt ner yr. <br /> <br />It is noted in the SCS Uinta Basin report that phreatophyte consumptive <br />use was estimated and included in the water budget. The data was based on an <br />estimate of acres of ohreatophytes by type that were supported by onfarm irrig- <br />ation flows. Consumptive use rates by tyee ranged from 0.78 to 4.07 ac. ft. per <br /> <br />year. <br /> <br />For the "KRK 'o'/Ster budget", 2500 acres at 2 aCt ft. per ac. per yr. was <br />used. This assumes that the difference in acreage and consumptive use rate <br />is made up by the precipitation increment. <br /> <br />Ponds <br /> <br />It was noticed that there are many small oonds throu~hout the valley. <br /> <br /> <br />Almost every farm seemed to have at least one nand that varied in size from <br /> <br /> <br />one-fourth acre to an acre or larger. It is presumed that they are used for <br /> <br /> <br />livestock water, fire protection, recreation and for re~lating irrigation <br /> <br /> <br />flo_. Their source of water is no doubt largely from irrigation diversions. <br /> <br /> <br />Assuming this is true, then ponds enter into the water bUdget and there are <br /> <br /> <br />two components; deep seepage and evaporation. <br /> <br />: <br />_l <br />