Streamflow and sediment-transport data, Colorado River and three tributaries in Grand Canyon, Arizona, 1983 and 1985-86

Garrett, W.B.; Vanter, E.K. van de; Graf, Julia B.

doi:10.3133/ofr93174

Cited by 12 publications

(3 citation statements)

References 4 publications

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“…All data in (A) and (B) were collected using a BM‐54 sampler except for the data in September 1998 and May 1999, which were collected using a pipe dredge. Data are from Garrett et al. (1993) and http://www.gcmrc.gov.…”

Section: Resultsmentioning

confidence: 99%

“…4). As during the 1996 controlled flood, the Grand Canyon gage was the only location where bed-sand grain-size measurements were made during the peak part of the 1983 flood ( Garrett et al, 1993). Unlike during the 1996 controlled flood, however, measurements of suspended sand concentration and grain size were not measured at any location until the receding limb of the 1983 flood.…”

Section: Regulation Of Sand Transport 1137mentioning

confidence: 99%

“…4). As during the 1996 controlled flood, the Grand Canyon gage was the only location where bed‐sand grain‐size measurements were made during the peak part of the 1983 flood (Garrett et al. , 1993).…”

Section: Introductionmentioning

confidence: 99%

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Regulation of sand transport in the Colorado River by changes in the surface grain size of eddy sandbars over multi‐year timescales

Topping¹,

Rubin

Schmidt

2005

Sedimentology

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In settings where the transport of sand is partially or fully supply limited, changes in the upstream supply of sand are coupled to changes in the grain size of sand on the bed. In this manner, the transport of sand under the supply‐limited case is ‘grain‐size regulated’. Since the closure of Glen Canyon Dam in 1963, the downstream reach of the Colorado River in Marble and Grand Canyons has exhibited evidence of sand‐supply limitation. Sand transport in the river is now approximately equally regulated by changes in the discharge of water and changes in the grain sizes of sand on the channel bed and eddy sandbars. Previous work has shown that changes in the grain size of sand on the bed of the channel (driven by changes in the upstream supply of sand owing to both tributary floods and high dam releases) are important in regulating sand transport over timescales of days to months. In this study, suspended‐sand data are analysed in conjunction with bed grain‐size data to determine whether changes in the grain size of sand on the bed of the channel or changes in the grain size of sand on the surface of eddy sandbars have been more important in regulating sand transport in the post‐dam Colorado River over longer, multi‐year timescales. The results of this study show that this combined theory‐ and field‐based approach can be used to deduce which environments in a complicated setting are the most important environments for regulating sediment transport. In the case of the regulated Colorado River in Marble and Upper Grand Canyons, suspended‐sand transport has been regulated mostly by changes in the surface grain size of eddy sandbars.

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Section: Resultsmentioning

confidence: 99%

Section: Regulation Of Sand Transport 1137mentioning

confidence: 99%

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Regulation of sand transport in the Colorado River by changes in the surface grain size of eddy sandbars over multi‐year timescales

Topping¹,

Rubin

Schmidt

2005

Sedimentology

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A detached eddy simulation model for the study of lateral separation zones along a large canyon‐bound river

2017

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Lateral flow separation occurs in rivers where banks exhibit strong curvature. In canyon‐bound rivers, lateral recirculation zones are the principal storage of fine‐sediment deposits. A parallelized, three‐dimensional, turbulence‐resolving model was developed to study the flow structures along lateral separation zones located in two pools along the Colorado River in Marble Canyon. The model employs the detached eddy simulation (DES) technique, which resolves turbulence structures larger than the grid spacing in the interior of the flow. The DES‐3D model is validated using Acoustic Doppler Current Profiler flow measurements taken during the 2008 controlled flood release from Glen Canyon Dam. A point‐to‐point validation using a number of skill metrics, often employed in hydrological research, is proposed here for fluvial modeling. The validation results show predictive capabilities of the DES model. The model reproduces the pattern and magnitude of the velocity in the lateral recirculation zone, including the size and position of the primary and secondary eddy cells, and return current. The lateral recirculation zone is open, having continuous import of fluid upstream of the point of reattachment and export by the recirculation return current downstream of the point of separation. Differences in magnitude and direction of near‐bed and near‐surface velocity vectors are found, resulting in an inward vertical spiral. Interaction between the recirculation return current and the main flow is dynamic, with large temporal changes in flow direction and magnitude. Turbulence structures with a predominately vertical axis of vorticity are observed in the shear layer becoming three‐dimensional without preferred orientation downstream.

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Coupled changes in sand grain size and sand transport driven by changes in the upstream supply of sand in the Colorado River: Relative importance of changes in bed-sand grain size and bed-sand area

Topping

Rubin

Melis

2007

Sedimentary Geology

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Streamflow and sediment-transport data, Colorado River and three tributaries in Grand Canyon, Arizona, 1983 and 1985-86

Cited by 12 publications

References 4 publications

Regulation of sand transport in the Colorado River by changes in the surface grain size of eddy sandbars over multi‐year timescales

Regulation of sand transport in the Colorado River by changes in the surface grain size of eddy sandbars over multi‐year timescales

A detached eddy simulation model for the study of lateral separation zones along a large canyon‐bound river

Coupled changes in sand grain size and sand transport driven by changes in the upstream supply of sand in the Colorado River: Relative importance of changes in bed-sand grain size and bed-sand area

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