Revisions to suspended-sediment concentration, percent smaller than 0.063 millimeter, and instantaneous suspended-sediment discharge reported for a cooperative program between the U.S. Geological Survey and the U.S. Army Corps of Engineers in the lower Mississippi-Atchafalaya River Basin, October 1989 to February 2015

Norton, Katherine K.; Olsen, Lisa D.; Baumann, Todd; Simmons, Lane B.; Clark, Athena P.; Demcheck, Dennis K.; Johnson, M. G.

doi:10.3133/sir20185147

Cited by 3 publications

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“…Sediment rating curves for Simmesport were based on USGS/USACE data collected between November 1998 and January 2016. The data included dissolved solid corrections from Norton et al (2019). A third-order polynomial regression equation was developed for both sand and total sediment concentrations.…”

Section: Red River Sediment Inflow For Hec-6tmentioning

confidence: 99%

“…Model between 2006 and2019. Mean monthly tide elevations were obtained from the NOAA web site (http://tidesandcurrents.noaa.gov). The Flowline Model had used the NOAA tide gage at Eugene Island, North of, LA (8764314), and a discontinued NOAA gage at Eugene Island, LA (8764311), to determine the downstream water-surface elevations.…”

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confidence: 99%

“…During the years when samples were collected at both sites, higher total sediment concentrations were reported for the samples collected downstream with the point sampler. The RM 11 data collected between 1989 and 2005 were corrected for dissolved solids in the USGS sediment data review study(Norton et al 2019). Of note is the construction of the J. Bennett Johnston Red River Waterway Project, which occurred between 1984 and 1994.…”

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Technical assessment of the Old, Mississippi, Atchafalaya, and Red (OMAR) Rivers : Atchafalaya River HEC-6T model

Donohue¹,

Copeland²

2022

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The HEC-6T one-dimensional numerical sedimentation model was used to evaluate the long-term and system-wide sedimentation effects of modifying the operation schedule at the Old River Control Complex (ORCC). The changes evaluated were increasing and decreasing the percentage of flow that is diverted to the Atchafalaya River from the Mississippi River at the ORCC and modifying the distributions through the four ORCC structures. Sedimentation effects for several operation scenarios were compared to a Base Condition that represented the existing operation protocols. Additionally, a dredging scenario was developed and analyzed. This scenario featured dredging material from the Mississippi River and depositing it into the Outflow Channel, downstream of the ORCC. The predictive simulations extended for 50 years. The model was used to calculate and compare sand transport past various gages along the Atchafalaya River. Also, the model compared differences in water surface elevations and bed elevations using a specific gage analysis at several gages along the Atchafalaya River. Last, the effects of the various scenarios on annual dredging requirements in Berwick Bay were also determined.

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Section: Red River Sediment Inflow For Hec-6tmentioning

confidence: 99%

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confidence: 99%

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