Difference between revisions of "GCDAMP Sediment"
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*[https://doi.org/10.3133/ofr20171030 Kaplinski et al. 2017. Channel mapping river miles 29–62 of the Colorado River in Grand Canyon National Park, Arizona, May 2009: U.S. Geological Survey Open-File Report 2017–1030, 35 p] | *[https://doi.org/10.3133/ofr20171030 Kaplinski et al. 2017. Channel mapping river miles 29–62 of the Colorado River in Grand Canyon National Park, Arizona, May 2009: U.S. Geological Survey Open-File Report 2017–1030, 35 p] | ||
| − | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR1_Topping.pdf Project 1: Streamflow, Water Quality, Sediment Transport, and Sand Budgets in the Colorado River Ecosystem | + | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR1_Topping.pdf Project 1: Streamflow, Water Quality, Sediment Transport, and Sand Budgets in the Colorado River Ecosystem ] |
| − | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR2_Dean.pdf Project 2: Hydrologic Change and the Geomorphic Transformation of the Little Colorado River: Implications for Sediment Delivery to the Grand Canyon | + | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR2_Dean.pdf Project 2: Hydrologic Change and the Geomorphic Transformation of the Little Colorado River: Implications for Sediment Delivery to the Grand Canyon ] |
| − | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR3_Grams.pdf Sandbars and Sediment Storage in Marble and Grand Canyons: Response to Recent High-flow Experiments and Long-term Trends | + | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR3_Grams.pdf Sandbars and Sediment Storage in Marble and Grand Canyons: Response to Recent High-flow Experiments and Long-term Trends ] |
'''2016''' | '''2016''' | ||
Revision as of 09:31, 5 April 2017
 The Paria River flowing into the mainstem Colorado River |
Sediment and GeomorphologyErosion 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, or HFEs, 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. [1] Beginning in 1998, recreational campsite area has also been measured on a subset of the sandbar monitoring sites. Campsite areas are defined as areas that are flat (less than 8 degree slope), smooth (not rocky), and clear of dense vegetation. Monitoring data show that vegetation expansion and sandbar erosion/deposition contribute to reductions in campsite area.
Desired Future Condition for Sediment-Related ResourcesHigh elevation open riparian sediment deposits along the Colorado River in sufficient volume, area, and distribution so as to provide habitat to sustain native biota and desired ecosystem processes |
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