AN exponential power function relating the fraction of sediment in a simulated rigid vegetal media to pertinent physical variables was developed using linear regression techniques and various transformations. Homogeneous sediments and non-submerging flows were studied. The mean velocity was found to be the most influential parameter on sedi-ment trapping followed by the flow depth, particle fall velocity, section length, and spacing hydraulic radius. The spacing hydraulic radius is a combination of the distance between two media elements and depth of flow and is analogous to the hydraulic radius of an open rectangular channel. This term was observed to be a reasonably good predictor of the length scale in shallow flows through the experimental media. An equation similar in form to Manning's equation utilizing the spacing hydraulic radius was observed to be a good predictor of the mean flow velocity.
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Tollner et al. (1976) studied this question.