Arching of Fragmented Ice Covers

A study of arching by fragmented ice floes across a gap in a surface obstacle is reported. The study included several series of experiments in a hydraulic flume in which simulated ice was released upstream of the surface obstacle at controlled rates and the occurrence or non-occurrence of the format...

Full description

Bibliographic Details
Main Authors: Calkins,Darryl J., Ashton,George D.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1975
Subjects:
Snow
Ice and Permafrost
*ICE
*FLOATING BODIES
SIMULATION
MODEL TESTS
TABLES(DATA)
ACCUMULATION
HYDRAULIC MODELS
INLAND WATERWAYS
Ice booms
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA009499
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA009499
Description
Summary:A study of arching by fragmented ice floes across a gap in a surface obstacle is reported. The study included several series of experiments in a hydraulic flume in which simulated ice was released upstream of the surface obstacle at controlled rates and the occurrence or non-occurrence of the formation of a stable arch was observed. The threshold of arching was found to correlate well as a function of the supply rate of surface area of ice, the exit ice surface discharge at the gap, and the ratio of individual floe size to gap dimension. In a series of corollary experiments an arch, once formed, was subjected to a disturbance in the form of a vertical rod traversed longitudinally through the accumulation in the upstream direction. The quantity of ice released and the rate of release prior to another arch re-forming was determined.

Similar Items