Salt and Selenium in Grand Valley Rivers and Streams. Joshua Linard U.S. Geological Survey Hydrologist email@example.com. Presentation Outline. Importance of salt and selenium Environmental processes controlling the movement of salt and selenium Water-quality standards for salt and selenium
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Joshua LinardU.S. Geological Survey Hydrologistjilinard@usgs.gov
Leib, K.J. 2008. Concentrations and Loads of Selenium in Selected Tributaries to the Colorado River in the Grand Valley, Western Colorado, 2004-2006. U.S. Geological Survey Scientific Investigations Report 2008-5036.
From Mayo, J.W. 2008. Estimating the effects of conversion of agricultural land to urban land on deep percolation of irrigation water in the Grand Valley, Western Colorado. U.S. Geological Survey Scientific Investigations Report 2008-5086.
¼-Acre Subdivision - bluegrass
5-Acre Estate - bluegrass
5-Acre Estate - Native Plants
5-Acre Estate – Orchard Grass
Quail Run – orchard grass
CSU – orchard grass
Paradise Hills Pond
Chipeta Pines Pond
1 Acreage for ¼ acre subdivisions in study was 40 percent irrigated on average
2 Acreage for 5 acre estates in study was 32 percent irrigated on average
3 Acreage for gated-pipe and alfalfa sites was assumed to be 90 percent irrigated
4 Acreage for irrigation holding ponds was assumed to be 100 percent covered with water
5 Numbers in parentheses are the range of values
From 1986 to 2003 the salinity load measured at the Colorado-Utah Stateline has decreased by over 300,000 tons.
Butler, D.L., 1996, Trend analysis of selected water-quality data associated with salinity-control projects in the Grand Valley, in the Lower Gunnison River Basin, and at Meeker Dome, Western Colorado: U.S. Geological Survey Water-Resources Investigations Report 95-4274, 38 p.
Bauch, N.J., and Spahr, N.E., 1998, Salinity Trends in Surface Waters of the Upper Colorado River Basin, Colorado: Journal of Environmental Quality, v. 27, no. 3, p. 640-655.
Leib, K.J. and Bauch, N.J., 2007, Salinity trends in the Upper Colorado River Basin upstream from the Grand Valley Salinity Control Unit, Colorado, 1986-2003, U.S. Geological Survey Scientific Investigations Report 2007-5288.