NEW CRITERIA FOR GRANULAR FILTERS AND GEOTEXTILE FILTERS UNDER REVETMENTS

K.J. Bakker, M. Klein Breteler, H. der Adel

Abstract


New criteria for the design of filters under revetments are introduced and verification tests are described. These criteria are based on a hydrodynamic limit instead of the usual geometric limit, assuming a similarity between the flow in open channels and flow in the pores at an interface between filter and base. First a theory was developed for a granular filter only, and later this theory was extended to include the influence of a geotextile. The verification experiments are outlined, and the applicability of the derived formulae is discussed.

Keywords


granular filter; geotextile filter; revetment; revetment filter

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