Longitudinal Floating Ice Control Structures: A New Concept for Reducing Ice Jam Flood Levels

A floating ice control structure placed in the streamwise direction of a river was analyzed to determine its effectiveness in reducing ice jam thicknesses. The theory describing the thickness for river ice jams was modified to analyze these longitudinal structures, providing the computational verifi...

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Bibliographic Details
Main Author: Calkins, Darryl J.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1990
Subjects:
Snow
Ice and Permafrost
Civil Engineering
*ICE PREVENTION
*CONTROL SYSTEMS
COMPUTATIONS
VERIFICATION
STRUCTURES
RIVERS
FLOODS
CHANNELS
COLLAPSE
FLOATING BODIES
IDAHO
THICKNESS
CONTROL
ICE
*ICE CONTROL
ICE JAMS
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA228561
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA228561
Description
Summary:A floating ice control structure placed in the streamwise direction of a river was analyzed to determine its effectiveness in reducing ice jam thicknesses. The theory describing the thickness for river ice jams was modified to analyze these longitudinal structures, providing the computational verification that ice jam thicknesses could be reduced where the mode of thickening is internal collapse. These longitudinal structures may provide a new tool to use in modifying the river ice regime, both at freeze-up and break-up. The concept was applied to the Salmon River at Salmon, Idaho, where it was estimated that a 0.9-m drop in river stage was possible using one structure in the center of the channel. Keywords: Ice control structures, Ice jams, Ice covers, River ice.

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