Hydraulic analysis of Mississippi River channels miles 373 to 603, fiscal year 1964 : Potamology Research Project 10
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Anding, Malcolm G.
Potamology ReportSummary: This report presents a description of field and office investigations of selected cross sections and reaches of the Lower Mississippi River made through FY 1964 as a part of the general potamology investigations for improving techniques for stabilizing the bed and banks of the Mississippi River. The general purpose of the investigations being conducted under Potamology Research Project 10 is to analyze the hydraulic elements of the Mississippi River cross sections and establish allowable limits of area-depth and width-depth variations and determine the relations of radii of curvature to widths and depths, all in relatively stable reaches of the river. Using these elements and factors as a guide, criteria can be developed for proper alignment through bends, desirable widths, depths, and lengths of crossings, and satisfactory control and alignment of relatively straight reaches. The principal studies of this project were based on analyzing elements of the Manning formula for uniform channel flow and related factors, and are considered to be a rational approach to the problem. Special studies include analyses of study gage data for specific reaches and presentation of comparative water-surface profiles. Additional studies of channel cross sections were made to develop practicable systems of stone training structures to align the channel and provide proper hydraulic characteristics for discharge and sediment transport. The analyses of individual cross sections in relatively stable reaches have shown the channel factor to vary uniformly with stage and to remain fairly constant at equal stages. Low-water plane widths and maximum depths were shown to be relatively constant for stable sections with wide variations at unstable sections in problem reaches. However, no relation was established for pools versus crossings or close agreement between similar sections in different reaches. There has not been sufficient time since construction of the stone training dikes for proper evaluation of the overall effects of these structures. The field and office investigations are being continued to obtain a sufficient sampling of data to establish trends and average values of factors useful in the design of structures fer aligning and controlling the river channel. The results of these studies will be combined with previous data covered herein, and presented in a later report.
U.S. Army Engineer Waterways Experiment Station.Engineer Research and Development Center (U.S.)
Potamology; Mississippi River; River banks; Bank caving; Bank stabilization; Dikes; Revetments; Meandering; Meanders; Hydraulics; Hydraulic forces; Hydrodynamics
Potamology investigations report ; 19-1.
Approved for public release; distribution is unlimited.