Modeling Ice Passage Through an Auxiliary Lock Chamber with a Submergible Lift Gate
River ice from the Des Moines and Fox Rivers combines with that of the Mississippi during spring breakup, resulting in massive ice accumulations upstream of Lock and Dam 20 on the Mississippi River. The accumulations in the upper lock approach area cause considerable delays to navigation, as ice mus...
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ftdtic:ADA268702 2023-05-15T16:37:09+02:00 Modeling Ice Passage Through an Auxiliary Lock Chamber with a Submergible Lift Gate Zufelt, Jon Rand, John Gooch, Gordon COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1993-06 text/html http://www.dtic.mil/docs/citations/ADA268702 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA268702 en eng http://www.dtic.mil/docs/citations/ADA268702 Approved for public release; distribution is unlimited. DTIC AND NTIS Snow Ice and Permafrost Civil Engineering *NAVIGATION *ICE *DAMS *LOCKS(WATERWAYS) TEST AND EVALUATION VELOCITY SIMULATION TRANSPORTATION MODELS RIVERS LIFT MISSISSIPPI RIVER ACCUMULATION MODEL TESTS MATERIALS PROTOTYPES ICE FORMATION WINTER FLOW RATE LIFT GATES RIVER ICE ICE FLOW Text 1993 ftdtic 2016-02-22T07:20:44Z River ice from the Des Moines and Fox Rivers combines with that of the Mississippi during spring breakup, resulting in massive ice accumulations upstream of Lock and Dam 20 on the Mississippi River. The accumulations in the upper lock approach area cause considerable delays to navigation, as ice must be passed through the lock chamber to clear the approach. A physical model study was conducted to determine the effects of using the existing auxiliary lock chamber to pass ice. The auxiliary lock chamber was fitted with a submergible lift gate at its upstream end that could be lowered to pass ice and clear the upperlock approach area. Model tests were conducted with real and plastic ice material to simulate the brash ice conditions encountered during low-flow prototype winter conditions. The submergible lift gate worked well in clearing ice accumulations from the upper lock approach. It was necessary to disturb the accumulation and keep it from refreezing by simulating towboat movement or high volume point source air bubblers to thoroughly clear the approach area. Auxiliary lock chamber, Navigation lock, River transportation, Ice passage, Physical model, Submergible lift gate, River ice. Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Civil Engineering *NAVIGATION *ICE *DAMS *LOCKS(WATERWAYS) TEST AND EVALUATION VELOCITY SIMULATION TRANSPORTATION MODELS RIVERS LIFT MISSISSIPPI RIVER ACCUMULATION MODEL TESTS MATERIALS PROTOTYPES ICE FORMATION WINTER FLOW RATE LIFT GATES RIVER ICE ICE FLOW |
spellingShingle |
Snow Ice and Permafrost Civil Engineering *NAVIGATION *ICE *DAMS *LOCKS(WATERWAYS) TEST AND EVALUATION VELOCITY SIMULATION TRANSPORTATION MODELS RIVERS LIFT MISSISSIPPI RIVER ACCUMULATION MODEL TESTS MATERIALS PROTOTYPES ICE FORMATION WINTER FLOW RATE LIFT GATES RIVER ICE ICE FLOW Zufelt, Jon Rand, John Gooch, Gordon Modeling Ice Passage Through an Auxiliary Lock Chamber with a Submergible Lift Gate |
topic_facet |
Snow Ice and Permafrost Civil Engineering *NAVIGATION *ICE *DAMS *LOCKS(WATERWAYS) TEST AND EVALUATION VELOCITY SIMULATION TRANSPORTATION MODELS RIVERS LIFT MISSISSIPPI RIVER ACCUMULATION MODEL TESTS MATERIALS PROTOTYPES ICE FORMATION WINTER FLOW RATE LIFT GATES RIVER ICE ICE FLOW |
description |
River ice from the Des Moines and Fox Rivers combines with that of the Mississippi during spring breakup, resulting in massive ice accumulations upstream of Lock and Dam 20 on the Mississippi River. The accumulations in the upper lock approach area cause considerable delays to navigation, as ice must be passed through the lock chamber to clear the approach. A physical model study was conducted to determine the effects of using the existing auxiliary lock chamber to pass ice. The auxiliary lock chamber was fitted with a submergible lift gate at its upstream end that could be lowered to pass ice and clear the upperlock approach area. Model tests were conducted with real and plastic ice material to simulate the brash ice conditions encountered during low-flow prototype winter conditions. The submergible lift gate worked well in clearing ice accumulations from the upper lock approach. It was necessary to disturb the accumulation and keep it from refreezing by simulating towboat movement or high volume point source air bubblers to thoroughly clear the approach area. Auxiliary lock chamber, Navigation lock, River transportation, Ice passage, Physical model, Submergible lift gate, River ice. |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Zufelt, Jon Rand, John Gooch, Gordon |
author_facet |
Zufelt, Jon Rand, John Gooch, Gordon |
author_sort |
Zufelt, Jon |
title |
Modeling Ice Passage Through an Auxiliary Lock Chamber with a Submergible Lift Gate |
title_short |
Modeling Ice Passage Through an Auxiliary Lock Chamber with a Submergible Lift Gate |
title_full |
Modeling Ice Passage Through an Auxiliary Lock Chamber with a Submergible Lift Gate |
title_fullStr |
Modeling Ice Passage Through an Auxiliary Lock Chamber with a Submergible Lift Gate |
title_full_unstemmed |
Modeling Ice Passage Through an Auxiliary Lock Chamber with a Submergible Lift Gate |
title_sort |
modeling ice passage through an auxiliary lock chamber with a submergible lift gate |
publishDate |
1993 |
url |
http://www.dtic.mil/docs/citations/ADA268702 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA268702 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA268702 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766027455134433280 |