AdvisorReplogle, John A.
Slack, Donald C.
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractA Sediment-Resistant flume has been tested and analyzed in the laboratory and field to measure flow rate with high sediment concentration for natural and irrigation streams. This flume is basically an improvement of the well studied long-throat flume which has an additional chute proposed by J. A. Replogle. The chute, where a new gauging station is located at the half-way point of its length equal to two times the throat length, worked satisfactory for a chute slope of 3%. For clear-water flow the chute showed a supercritical and curvilinear flow having a hydrostatic pressure consistently located at the halfway of the chute. For sediment-laden flow with a concentration of 3% by weight of clear mortar sand, behavior was similar to the clear-water. Sediment deposits filled the approach channel of the flume and plugged the intake pipe of the supercritical gauging station causing it to fail. This failure was compensated for by the use of the new supercritical additional gauging station located in the chute, which remains clean and continues to measure the flow-rate. Hydraulic behavior of the stage-discharge curves for the sediment-laden flow flume was similar to the clear-water flow after the approach channel was filled. Prior to filling an inconsistent condition existed caused by the sediment movements in the approach channel. It was shown that this flume might be used in the field with errors of 5% or less. In addition, a computer program was developed to compute the stage-discharge curve using the dynamic equation of gradually varied flow, which may be used to compute the stage-discharge curve in new flumes. Further laboratory and field research is to be expected to compare these results with future data to improve reliably.
Degree ProgramGraduate College
Agricultural & Biosystems Engineering