Difference between revisions of "GCDAMP Sediment"
From Glen Canyon Dam AMP
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| − | + | [[File:Sandbars 1990 2014.jpg|600px]] | |
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*[http://www.gcmrc.gov/discharge_qw_sediment/station/GCDAMP/09382000#/ '''Paria River sediment gage'''] Click here to calculate how much sediment has come in from the Paria River. | *[http://www.gcmrc.gov/discharge_qw_sediment/station/GCDAMP/09382000#/ '''Paria River sediment gage'''] Click here to calculate how much sediment has come in from the Paria River. | ||
*[http://gcdamp.com/index.php?title=The_HFE_Page '''The HFE Page'''] See summaries from past HFEs | *[http://gcdamp.com/index.php?title=The_HFE_Page '''The HFE Page'''] See summaries from past HFEs | ||
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| − | + | *Eddies occur adjacent to rapids and the flow in the eddy is related to the flow characteristics in the rapid. Sand bars were typically larger before the dam.(Science Background for HFE Planning- Jack Schmidt, GCMRC_KA 2013) | |
| + | *[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/02jan17/Attach_10b.pdf Sediment Presentation- AMWG Jan 2002] | ||
| + | *[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/02jan17/Attach_10a.pdf Sediment White Paper- AMWG Jan 2002] | ||
| + | *[http://www.nationalparkstraveler.com/2014/11/high-flows-through-grand-canyon-national-park-met-mixed-reactions25903 The United States Geological Survey estimates that the Colorado River below Glen Canyon Dam only has 6 percent of the sediment that it received before the Glen Canyon Dam was built in the 1960s.] | ||
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Revision as of 10:47, 25 May 2016
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Erosion of sandbars (beaches) along the Colorado River in Grand Canyon was first reported in the early 1970s, approximately 10 years after completion of Glen Canyon Dam. Since then, scientific studies have been conducted to monitor changes in sandbars and changes in the amount of sand stored on the bed of the river. One of the outcomes of these studies has been the implementation of flow experiments intended to rebuild eroded sandbars, especially by the release of controlled floods, also called “high-flow experiments,” from Glen Canyon Dam. The sediment and geomorphology projects at Grand Canyon Monitoring and Research Center include the collection and processing of data to provide information needed to conduct controlled floods and to evaluate the outcome of each controlled flood and the long-term effects of controlled floods and normal dam operations on sediment-related resources. |
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