The use of streambed temperatures to estimate transmission losses on an experimental channel.

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Quantifying channel transmission losses in arid environments is important for a variety of reasons, from engineering design of flood control structures to evaluating recharge. To quantify the losses in an alluvial channel, an experiment was performed on a 2-km reach of an alluvial fan located on the Nevada Test Site. The channel was subjected to three separate flow events. Transmission losses were estimated using standard discharge monitoring and subsurface temperature modeling approach. Four stations were equipped to continuously monitor stage, temperature, and water content. Streambed temperatures measured at 0, 30, 50 and 100 cm depths were used to calibrate VS2DH, ... continued below

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1 pages

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Naranjo, Ramon C.; Young, Michael H.; Niswonger, Richard; Miller, Julianne J. & French, Richard H. October 18, 2001.

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Description

Quantifying channel transmission losses in arid environments is important for a variety of reasons, from engineering design of flood control structures to evaluating recharge. To quantify the losses in an alluvial channel, an experiment was performed on a 2-km reach of an alluvial fan located on the Nevada Test Site. The channel was subjected to three separate flow events. Transmission losses were estimated using standard discharge monitoring and subsurface temperature modeling approach. Four stations were equipped to continuously monitor stage, temperature, and water content. Streambed temperatures measured at 0, 30, 50 and 100 cm depths were used to calibrate VS2DH, a two-dimensional, variably saturated flow model. Average losses based on the difference in flow between each station indicate that 21 percent, 27 percent, and 53 percent of the flow was reduced downgradient of the source. Results from the temperature monitoring identified locations with large thermal gradients, suggesting a conduction-dominated heat transfer on streambed sediments where caliche-cemented surfaces were present. Transmission losses at the lowermost segment corresponded to the smallest thermal gradient, suggesting an advection-dominated heat transfer. Losses predicted by VS2DH are within an order of magnitude of the estimated losses based on discharge measurements. The differences in losses are a result of the spatial extent to which the modeling results are applied and lateral subsurface flow.

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1 pages

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OSTI as DE00788366

Source

  • 2001 American Geophysical Union meeting, San Francisco, CA (US), 12/10/2001--12/14/2001

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  • Report No.: A-2001-06
  • Grant Number: AC08-00NV13609
  • Office of Scientific & Technical Information Report Number: 788366
  • Archival Resource Key: ark:/67531/metadc716656

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  • October 18, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • Aug. 8, 2016, 7:32 p.m.

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Naranjo, Ramon C.; Young, Michael H.; Niswonger, Richard; Miller, Julianne J. & French, Richard H. The use of streambed temperatures to estimate transmission losses on an experimental channel., article, October 18, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc716656/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.