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Title: Development of operating technique for and verification of channel-meander model
Authors: United States. Mississippi River Commission.
U.S. Army Engineer Waterways Experiment Station.
Keywords: Hydraulic models
Physical models
Mississippi River
Meandering rivers
River banks
Bank caving
Scrubgrass Bend
Concordia Bend
Publisher: U.S. Army Engineer Waterways Experiment Station.
Engineer Research and Development Center (U.S.)
Series/Report no.: Potamology investigations report ; no. 16-1.
Description: Potamology Report
Summary: Although model studies of bed-load movement in rivers with stable banks have long been conducted successfully by use of such materials as crushed coal or haydite to simulate the sand bed of the river, studies of river changes involving unstable caving banks had never been successfully accomplished at the time that this investigation was undertaken. The latter type of study involves reproduction not only of bed-load movement but also of vertically standing, yet undermining and sloughing, banks. Also, the caved bank material must become normal bed load after the cohesive silt or clay that enabled it to form a standing bank has washed away. A further complication is that the materials making up the banks of a natural river are far from homogeneous, varying from erosion-resistant clay to almost pure sand. The general purpose of this study was to develop an erodible bed and bank material and a model operating technique that would result in a model river having the above-described characteristics of a meandering stream. The specific objectives of the study were as follows: (a.) To develop a material or materials that would react to erosion and transportation in models in a manner similar to that in which the prototype materials react to these phenomena. (b.) To correlate erodibility of the model material with that of various materials found in the prototype river. (c.) To develop a model operating technique that can be used to reproduce the meandering tendencies of troublesome reaches of the prototype river.
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