Laserfiche WebLink
<br />.-- <br /> <br />. <br /> <br />. <br /> <br />r- <br />l.{) <br />L:J <br />c) <br />.-') <br /> <br />."--, <br /> <br />CHAPTER II <br /> <br />GRAND VALLEY RIVER BUDGET <br /> <br />determined from the records of the water districts, and non-'agricultural <br /> <br />vegetative consumptions were found by making assumptions as to their <br /> <br />relationship to crop consumption. <br /> <br />In 1969, Colorado State University conducted a very extensive survey of <br /> <br />all the lands within the Grand Valley hydrologic boundaries. Their survey <br /> <br />accounted for all acreage including that of farmsteads, resi.dential lawns, <br /> <br />industrial lands, and non-agricultural consumers such as cottonwoods, <br /> <br />greasewood, and sagebrush. In 1973, the Bureau of Reclamati.on did another <br /> <br />survey of the agricultural lands. The small differences between the two <br /> <br />surveys were attributed to the natural variation between thE! season to season <br /> <br />cropping patterns. These cropping patterns were applied to Walker's Budget <br /> <br />in the 1974, 1975, and 1976 water years for the original internal river <br />analysis.Y <br /> <br />Two recent events have affected the consumptive use in the valley, The <br /> <br />first is the elimination of sugar beets in 1976, and the second is the <br /> <br />tremendous residential growth in the eastern end of the valley in the last <br /> <br />ten years. To account for the removal of sugar beets, the Reed Wash Study <br /> <br />Area was surveyed in 1980. This information was used to de'ielop a post sugar <br /> <br />beet crop distribution for the entire valley which was applied to the years <br /> <br />1977 through 1980. To account for residential and connnercL.l growth, zoning <br /> <br />maps and development filings were obtained from the City-County Development <br /> <br />Department of Mesa County. Using the 1969 Colorado State University study as <br /> <br />1/ Walker developed a hydro-salinity budget a~d applied it to the 1969 <br />water-year in Grand Valley. See Walker, W.R., "Hydro-salinity model of the <br />Grand Valley," M. S. Thesis CET-71WRW8, Civil Engineering Department, Colorado <br />State University, Fort Collins, August 1970. <br /> <br />II-6 <br />