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Estimates Of Deep Percolation Beneath Native Vegetation Irrigated Fields And The Amargosa River Channel Amargosa Desert Nye County Nevada
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Book Synopsis Estimates of Deep Percolation Beneath Native Vegetation, Irrigated Fields, and the Amargosa-River Channel, Amargosa Desert, Nye County, Nevada by :
Download or read book Estimates of Deep Percolation Beneath Native Vegetation, Irrigated Fields, and the Amargosa-River Channel, Amargosa Desert, Nye County, Nevada written by and published by DIANE Publishing. This book was released on with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimates of Deep Percolation Beneath Native Vegetation, Irrigated Fields, and the Amargosa-river Channel, Amargosa Desert, Nye County, Nevada by :
Download or read book Estimates of Deep Percolation Beneath Native Vegetation, Irrigated Fields, and the Amargosa-river Channel, Amargosa Desert, Nye County, Nevada written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The presence and approximate rates of deep percolation beneath areas of native vegetation, irrigated fields, and the Amargosa-River channel in the Amargosa Desert of southern Nevada were evaluated using the chloride mass-balance method and inferred downward velocities of chloride and nitrate peaks. Estimates of deep-percolation rates in the Amargosa Desert are needed for the analysis of regional ground-water flow and transport. An understanding of regional flow patterns is important because ground water originating on the Nevada Test Site may pass through the area before discharging from springs at lower elevations in the Amargosa Desert and in Death Valley. Nine boreholes 10-16 meters deep were cored nearly continuously using a hollow-stem auger designed for gravelly sediments. Two boreholes were drilled in each of three irrigated fields in the Amargosa-Farms area, two in the Amargosa-River channel, and one in an undisturbed area of native vegetation. Data from previously cored boreholes beneath undisturbed, native vegetation were compared with the new data to further assess deep percolation under current climatic conditions and provide information on spatial variability. The profiles beneath native vegetation were characterized by large amounts of accumulated chloride just below the root zone with almost no further accumulation at greater depths. This pattern is typical of profiles beneath interfluvial areas in arid alluvial basins of the southwestern United States, where salts have been accumulating since the end of the Pleistocene. The profiles beneath irrigated fields and the Amargosa-River channel contained more than twice the volume of water compared to profiles beneath native vegetation, consistent with active deep percolation beneath these sites. Chloride profiles beneath two older fields (cultivated since the 1960's) as well as the upstream Amargosa-River site were indicative of long-term, quasi-steady deep percolation. Chloride profiles beneath the newest field (cultivated since 1993), the downstream Amargosa-River site, and the edge of an older field were indicative of recently active deep percolation moving previously accumulated salts from the upper profile to greater depths. Results clearly indicate that deep percolation and ground-water recharge occur not only beneath areas of irrigation but also beneath ephemeral stream channels, despite the arid climate and infrequency of runoff. Rates of deep percolation beneath irrigated fields ranged from 0.1 to 0.5 m/yr. Estimated rates of deep percolation beneath the Amargosa-River channel ranged from 0.02 to 0.15 m/yr. Only a few decades are needed for excess irrigation water to move through the unsaturated zone and recharge ground water. Assuming vertical, one-dimensional flow, the estimated time for irrigation-return flow to reach the water table beneath the irrigated fields ranged from about 10-70 years. In contrast, infiltration from present-day runoff takes centuries to move through the unsaturated zone and reach the water table. The estimated time for water to reach the water table beneath the channel ranged from 140 to 1000 years. These values represent minimum times, as they do not take lateral flow into account. The estimated fraction of irrigation water becoming deep percolation averaged 8 to 16 percent. Similar fractions of infiltration from ephemeral flow events were estimated to become deep percolation beneath the normally dry Amargosa-River channel. In areas where flood-induced channel migration occurs at sub-centennial frequencies, residence times in the unsaturated zone beneath the Amargosa channel could be longer. Estimates of deep percolation presented herein provide a basis for evaluating the importance of recharge from irrigation and channel infiltration in models of ground-water flow from the Nevada Test Site.
Book Synopsis U.S. Geological Survey Professional Paper by :
Download or read book U.S. Geological Survey Professional Paper written by and published by . This book was released on 1984 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Frontiers in Flood Research by : Ioulia Tchiguirinskaia
Download or read book Frontiers in Flood Research written by Ioulia Tchiguirinskaia and published by . This book was released on 2006 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Groundwater Recharge from Run-off, Infiltration and Percolation by : K.-P. Seiler
Download or read book Groundwater Recharge from Run-off, Infiltration and Percolation written by K.-P. Seiler and published by Springer Science & Business Media. This book was released on 2007-09-20 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: To face the threats to the water supply and to maintain sustainable water management policies, detailed knowledge is needed on the surface-to-subsurface transformation link in the water cycle. Recharge flux is covered in this book as well as many other groundwater issues, including a comparison of the traditional and modern approaches to determine groundwater recharge. The authors also explain in detail the fate of groundwater recharge in the subsurface by hydraulic and geologic means, in order to stimulate adapted groundwater-management strategies.
Book Synopsis Pipeline/South Pipeline Pit Expansion Project, Battle Mountain by :
Download or read book Pipeline/South Pipeline Pit Expansion Project, Battle Mountain written by and published by . This book was released on 2005 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water-quality Assessment of the Principal Valley-fill Aquifers in the Southern Sanpete and Central Sevier Valleys, Sanpete County, Utah by : Janae Wallace
Download or read book Water-quality Assessment of the Principal Valley-fill Aquifers in the Southern Sanpete and Central Sevier Valleys, Sanpete County, Utah written by Janae Wallace and published by Utah Geological Survey. This book was released on 2010 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study (132 p., 6 pl.) assesses water quality in the aquifers in the southern Sanpete and central Sevier Valleys to determine likely sources of nitrate pollution and determine the relative age of high-nitrate water"--Back label of container.
Book Synopsis Groundwater hydrology of the upper Klamath basin, Oregon and California by :
Download or read book Groundwater hydrology of the upper Klamath basin, Oregon and California written by and published by DIANE Publishing. This book was released on with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2004 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrogeology of Morgan Valley, Morgan County, Utah by : Janae Wallace
Download or read book Hydrogeology of Morgan Valley, Morgan County, Utah written by Janae Wallace and published by Utah Geological Survey. This book was released on 2012-01-16 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report characterizes the relationship of geology to groundwater occurrence and flow, with emphasis on determining the thickness of the valley-fill aquifer and water yielding properties of the fractured rock aquifers. Develops a water budget for the drainage basin and classifies the groundwater quality and identifies the likely sources of nitrate in groundwater.
Download or read book Southwest Hydrology written by and published by . This book was released on 2004 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Encyclopedia of Hydrological Sciences by : M. G. Anderson
Download or read book Encyclopedia of Hydrological Sciences written by M. G. Anderson and published by . This book was released on 2005 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Science by : John Michels (Journalist)
Download or read book Science written by John Michels (Journalist) and published by . This book was released on 2003 with total page 1236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimates of Ground-water Discharge as Determined from Measurements of Evapotranspiration, Ash Meadows Area, Nye County, Nevada by :
Download or read book Estimates of Ground-water Discharge as Determined from Measurements of Evapotranspiration, Ash Meadows Area, Nye County, Nevada written by and published by . This book was released on 1999 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ground-water Discharge Determined from Measurements of Evapotranspiration, Other Available Hydrologic Components, and Shallow Water-level Changes, Oasis Valley, Nye County, Nevada by :
Download or read book Ground-water Discharge Determined from Measurements of Evapotranspiration, Other Available Hydrologic Components, and Shallow Water-level Changes, Oasis Valley, Nye County, Nevada written by and published by . This book was released on 2002 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Estimates of Deep-percolation Return Flow Beneath a Flood- and a Sprinkler-irrigated Site in Weld County, Colorado, 2008-2009 by : L. R. Arnold
Download or read book Estimates of Deep-percolation Return Flow Beneath a Flood- and a Sprinkler-irrigated Site in Weld County, Colorado, 2008-2009 written by L. R. Arnold and published by . This book was released on 2011 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ground-water Hydrology of the Upper Deschutes Basin, Oregon by :
Download or read book Ground-water Hydrology of the Upper Deschutes Basin, Oregon written by and published by . This book was released on 2001 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: