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Stabilising the sediment bed in laboratory flumes

Lookup NU author(s): Professor Eric Valentine, Dr James Bathurst


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Recent laboratory investigations of alluvial channels with loose bed and banks of coarse sand required a method for immobilising or 'freezing' the loose boundary to permit time consuming hydraulic measurements without changes in the boundary geometry. A technique involving spraying separate solutions of sodium silicate and sodium bicarbonate on to a drained channel has been rediscovered, and is reported here. After freezing the changes in geometry and hydraulic roughness are negligible and some results are presented to illustrate this. The equipment and materials costs are low. Furthermore, for freezing a large area the method described has advantages, from a health and safety point of view, over using adhesives or dry cement powder as alternatives.

Publication metadata

Author(s): Benson IA, Valentine EM, Nalluri C, Bathurst JC

Publication type: Article

Publication status: Published

Journal: Journal of Hydraulic Research

Year: 2001

Volume: 39

Issue: 3

Pages: 279-282

ISSN (print): 0022-1686

ISSN (electronic):

Publisher: International Association of Hydraulic Engineering and Research


DOI: 10.1080/00221680109499831


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