KWRRI Research Reports


Simulated dense vegetation with random blade arrangements and different blade flexibilities were used to determine the hydraulic properties of flow of small, non-submerging depths. With the water flowing among the randomly patterned vegetation blades, drag resistance becomes the dominant force that retards the flow. An equation of flow was established based on the momentum balance in the system. Experimental results were used to determine the coefficient of blade resistance, RD, and plotted in terms of blade width and flow depth Reynolds number respectively.

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The work on which this report is based was supported in part by funds by the Office of Water Research and Technology, United States Department of the Interior, as authorized under the Water Resources Research Act of 1964.