Bathymetric and velocimetric surveys at highway bridges crossing the Missouri River near Kansas City, Missouri, August 2019, August 2020, and October 2020

Abstract

The author also wishes to gratefully acknowledge the assistance of several current and former colleagues at the U.S. Geological Survey Central Midwest Water Science Center for their assistance in collecting and processing the data for this project. Jarrett T. Ellis (former employee) was instrumental in collecting and initial processing of the data from the August 2019 surveys. Benjamin C. Rivers was instrumental in collecting the data from the two special surveys near the main channel piers of the Broadway and Randolph bridges in August and October 2020.

Bathymetric and velocimetric surveys at highway bridges crossing the Missouri River between Kansas City and St. Louis, Missouri, May 19–26, 2021

“…3B) and an incorrectly applied magnetic variation or grid convergence parameter in the post-processing of the survey data (Rivers and others, 2023). The measured angular offset for roll remained a constant −0.10 (table 4), which is different from previous results for this equipment configuration in other recent surveys (Huizinga, 2022a;Huizinga and others, 2023); however, the MBES had undergone calibration testing in January 2021, which is the likely source of the change.…”

“…12). As in previous surveys (Huizinga, 2012(Huizinga, , 2022a, a rock outcrop was evident on the right (south) bank at the upstream end of the reach, and the stone revetment and a longitudinal spur dike also were present on the right bank throughout the reach (fig. 12).…”

“…Information about the velocity of the river at various points throughout each study reach was collected using an acoustic Doppler current profiler (ADCP), similar to previous studies since 2011 by Huizinga (for example, refer to Huizinga, 2012Huizinga, , 2022a. A Teledyne RD Instruments Rio Grande ADCP operating at 600 kHz was used to obtain velocities at 1.64-ft increments, or "bins," throughout the water column.…”

Bathymetric and velocimetric surveys at highway bridges crossing the Missouri and Mississippi Rivers near St. Louis, Missouri, August 3–10, 2020

“…Information about the velocity of the river at various points throughout each study reach were collected using an acoustic Doppler current profiler (ADCP), similar to previous studies since 2011 by Huizinga (for example, see Huizinga, 2012Huizinga, , 2022a. A Teledyne RD Instruments Rio Grande ADCP operating at 600 kHz was used to obtain velocities at 1.64-ft increments, or "bins," throughout the water column.…”

“…Similar to recent bathymetry studies in Missouri (Huizinga, , 2017a(Huizinga, , b, 2020a(Huizinga, , b, c, d, e, 2021(Huizinga, , 2022a, uncertainty in each survey was estimated by computing the uncertainty for each survey-grid cell in the bathymetric surface of the survey area using the CUBE method (Calder and Mayer, 2003). The gridded uncertainty is a measure of the variability of the individual points in the cell used to determine the CUBE-derived elevation for the cell.…”