Ice Sheet Retention Structures
Ice sheets are formed and retained in several ways in nature, and an understanding of these factors is needed before most structures can be successfully applied. Many ice sheet retention structures float and are somewhat flexible; others are fixed and rigid or semirigid. An example of the former is...
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1983
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ftdtic:ADA138030 2023-05-15T16:40:12+02:00 Ice Sheet Retention Structures Perham,R E COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1983-12 text/html http://www.dtic.mil/docs/citations/ADA138030 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA138030 en eng http://www.dtic.mil/docs/citations/ADA138030 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Hydrology Limnology and Potamology Civil Engineering *Ice Inland waterways Sheets Control systems Retention(General) Structures Waterfront structures Flexible structures Booms(Equipment) LPN-CWIS-31725 Text 1983 ftdtic 2016-02-19T09:15:30Z Ice sheets are formed and retained in several ways in nature, and an understanding of these factors is needed before most structures can be successfully applied. Many ice sheet retention structures float and are somewhat flexible; others are fixed and rigid or semirigid. An example of the former is the Lake Erie ice boom and of the latter, the Montreal ice control structure. Ice sheet retention technology is changing. The use of timber cribs is gradually but not totally giving way to sheet steel pilings and concrete cells. New structures and applications are being tried but with caution. Ice-hydraulic analyses are helpful in predicting the effects of structures and channel modifications on ice cover formation and retention. Often, varying the flow rate in a particular system at the proper time will make the difference between whether a structure will or will not retain ice. The structure, however, invariably adds reliability to the sheet ice retention process. (Author) Errata sheet inserted. Text Ice Sheet Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Hydrology Limnology and Potamology Civil Engineering *Ice Inland waterways Sheets Control systems Retention(General) Structures Waterfront structures Flexible structures Booms(Equipment) LPN-CWIS-31725 |
spellingShingle |
Hydrology Limnology and Potamology Civil Engineering *Ice Inland waterways Sheets Control systems Retention(General) Structures Waterfront structures Flexible structures Booms(Equipment) LPN-CWIS-31725 Perham,R E Ice Sheet Retention Structures |
topic_facet |
Hydrology Limnology and Potamology Civil Engineering *Ice Inland waterways Sheets Control systems Retention(General) Structures Waterfront structures Flexible structures Booms(Equipment) LPN-CWIS-31725 |
description |
Ice sheets are formed and retained in several ways in nature, and an understanding of these factors is needed before most structures can be successfully applied. Many ice sheet retention structures float and are somewhat flexible; others are fixed and rigid or semirigid. An example of the former is the Lake Erie ice boom and of the latter, the Montreal ice control structure. Ice sheet retention technology is changing. The use of timber cribs is gradually but not totally giving way to sheet steel pilings and concrete cells. New structures and applications are being tried but with caution. Ice-hydraulic analyses are helpful in predicting the effects of structures and channel modifications on ice cover formation and retention. Often, varying the flow rate in a particular system at the proper time will make the difference between whether a structure will or will not retain ice. The structure, however, invariably adds reliability to the sheet ice retention process. (Author) Errata sheet inserted. |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Perham,R E |
author_facet |
Perham,R E |
author_sort |
Perham,R E |
title |
Ice Sheet Retention Structures |
title_short |
Ice Sheet Retention Structures |
title_full |
Ice Sheet Retention Structures |
title_fullStr |
Ice Sheet Retention Structures |
title_full_unstemmed |
Ice Sheet Retention Structures |
title_sort |
ice sheet retention structures |
publishDate |
1983 |
url |
http://www.dtic.mil/docs/citations/ADA138030 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA138030 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA138030 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766030585683247104 |