Ice Atlas 1984 - 1985

Ice conditions on inland rivers can change rapidly and adversely affect navigation. The ice maps in this atlas were prepared to document the 1984-85 ice conditions on those reaches of the Ohio, Allegheny and Monongahela Rivers that are included in study areas for the River Ice Management (RIM) progr...

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Bibliographic Details
Main Authors: Gatto, Lawrence, Daly, Steven F., Carey, Kevin
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1986
Subjects:
Cartography and Aerial Photography
Hydrology
Limnology and Potamology
Snow
Ice and Permafrost
*MAPS
*RIVERS
*ICE
SOLIDS
NAVIGATION
VERTICAL ORIENTATION
COVERINGS
VIDEO SIGNALS
CLOUD COVER
LOW ALTITUDE
OHIO RIVER
OPEN WATER
PHOTOGRAPHIC IMAGES
CEILING
AERIAL PHOTOGRAPHY
TELEVISION CAMERAS
INLAND WATERWAYS
FRAGMENTATION
ICE REPORTING
SPATIAL DISTRIBUTION
MANAGEMENT
*ICE COVER
*RIVER ICE
RIM(RIVER ICE MANAGEMENT)
ALLEGHENY RIVER
MONONGAHELA RIVER
ICE FLOES
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA211470
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA211470
Description
Summary:Ice conditions on inland rivers can change rapidly and adversely affect navigation. The ice maps in this atlas were prepared to document the 1984-85 ice conditions on those reaches of the Ohio, Allegheny and Monongahela Rivers that are included in study areas for the River Ice Management (RIM) program, namely river mile 0 to 437 on the Ohio River, mile 0 to 7 on the Allegheny, and mile 0 to 66 on the Monongahela. The maps were prepared from interpretation of vertical aerial video imagery taken from a low-flying aircraft. The interpreted ice conditions were classified into five units and transferred to base maps by reference to navigation charts and topographic maps. Fragmented ice cover and ice floes or frazil slush and pans were the most common ice units in the lower pools of the Monongahela River and lower Allegheny. Solid ice cover and fragmented ice cover were the most common units in the upper pools of the Monongahela. Fragmented ice cover and open water were the most extensive units in the Emsworth to New Cumberland pools of the Ohio; open water and ice floes or frazil slush and pans were the predominant units in the downstream pools. There were frequent cancellations of flights during the 1984-85 winter because of low cloud ceilings. To get more frequent video coverage of ice during the 1985-86 winter, a wider-angle lens on the video camera will be used. This will allow flights at a lower altitude, permitting video coverage even when the ceiling is low. Keywords: Allegheny River; Ice reporting; Inland waterways; Monongahela River; River ice.

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