Author(s): J. H. Lever; G. Gooch; E. P. Foltyn
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Abstract: Frazil ice production in small, steep rivers can lead to thick freezeup ice jams and consequent flooding. One way to control these ice jams is to collect frazil ice and promote ice-cover propagation in a safe location upstream. We have developed a seasonally installed weir that can assist an ice boom or natural ice arching to arrest frazil floes. This "tension weir" consists of a 0.9-m-high impermeable fabric mounted on wire mesh, held in shape under tension by wire rope connected to deadman anchors. We used model tests to optimize the weir shape, seals, and scour protection. Field tests of the structure showed that it performs well during both freezeup and breakup conditions. This paper describes the design, construction, and testing of the tension weir and possible improvements on its design.
Year: 1998