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Determination Of Sediment Filtration Efficiency Of Grass Media, David T. Kao
Determination Of Sediment Filtration Efficiency Of Grass Media, David T. Kao
KWRRI Research Reports
Vegetative filters serve the purpose of retarding flow. As a result the sediment carrying power of flowing water in a vegetated channel is greatly reduced and silting takes place along the section where the vegetation is planted.
The mechanism of the filtering action of real or artificial vegetation can be described by a simplified principle, in that a gross reduction of turbulent fluctuation of the fluid is involved. This in turn allows the sediment particles to settle under the force of gravity more readily. In the case of nonsubrnerged flow, solid particles may settle out even faster due to the …