Ice Observations on the Allegheny and Monongahela Rivers

• Main Authors: Bilello, Michael A., Gatto, Lawrence W., Daly, Steven F., Gagnon, John J.
• Other Authors: OFFICE OF THE CHIEF OF ENGINEERS (ARMY) WASHINGTON DC
• Format: Text
• Language: English
• Published: 1988
• Subjects: Snow; Ice and Permafrost; Civil Engineering; *OBSERVATION; *ICE; THICKNESS; GRAPHS; AIRBORNE; CODING; WINTER; NAVIGATION; IMAGES; ARTIFICIAL SATELLITES; ARMY CORPS OF ENGINEERS; RIVERS; RECORDS; PENNSYLVANIA; VIDEO TAPES; WEST VIRGINIA; DAMS; ALPHANUMERIC DATA; SOURCES; POSITION(LOCATION); Ice; permafrost
• Online Access: http://www.dtic.mil/docs/citations/ADA213028; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA213028

Corps of Engineers and National Weather Service records if ice conditions on the Allegheny and Monongahela Rivers in Pennsylvania and West Virginia were analyzed for seven recent winters. The on-ground observations recorded daily at a number of lock and dam locations were issued in the form of alphanumeric ice codes that included the coverage, type, thickness, structure and extent of river ice. These codes were used to graph ice conditions throughout the rivers to allow easier analysis of historical ice conditions. In addition, comparisons were made between these observations and aerial videotapes and satellite images of the ice. Results of these comparisons illustrate that ice data from these three sources are complementary and should be used together whenever possible. Keywords: Allegheny river; River ice; Ice; Monongahela River, Winter navigation. (SDW)