Laserfiche WebLink
<br />co <br />~ <br />i'" <br /><..:) <br />o <br />o <br /> <br />ABSTRACT <br /> <br />ld <br /> <br />A surrunary of the results of applied research on salinity <br />control of irrigation return flows in the Grand Valley of <br />Colorado is presented for the period of 1969 to 1976. Salinity <br />and economic impacts are described for the Grand Valley Salinity <br />Control Demonstration Project which contains approximately 1,600 <br />hectares and involves most of the local irrigation companies in <br />the Valley. During the eight years of studies in the project <br />area, 12.2 km of canals were lined, 26.54 km of laterals were <br />lined, 16,400 meters of drainage tile were installed, a wide <br />variety of on-farm improvements were constructed, and an irri- <br />gation sCheduling program was implemented. On-farm improvements <br />evaluated were sOlid-set sprinklers, side-roll ,sprinklers, drip <br />(triCkle) irrigation, furrow irrigation, and automatic cut-back <br />furrow irrigation. The total value of the consl:ructed improve- <br />ments in the demonstration area was about $750,000. The total <br />improvements resulted in a salt reduction of 12,300 metric tons <br />per year reaching the Colorado River. This salt reduction results <br />in an annual benefit to downstream water users of nearly <br />$2,000,000. In addition, there are benefits to the local water <br />users with increased crop yields, and to the people of Grand <br />Valley in increased business. <br /> <br />ng <br /> <br />ls <br />i 1 <br /> <br />In <br /> <br />This report was submitted in fulfillment of Grant No. <br />S-802985 by the Agricultural and Chemical EngineE~ring Department <br />of Colorado State University under the sponsorsh:lp of the <br />Robert S. Kerr Environmental Research Laboratory,. U. S. Environ- <br />mental Protection Agency. This report covers the, period <br />February 18, 1974 to February 17, 1977. <br /> <br />" <br />ii <br /> <br /> <br />v <br /> <br />