Accession Number : AD0724683
Title : Spring Breakup of the Delta River, Alaska.
Descriptive Note : Special rept.,
Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Personal Author(s) : Slaughter,C. W. ; Samide,H. R.
Report Date : APR 1971
Pagination or Media Count : 37
Abstract : Spring 'breakup' of snow and ice on the Delta River, Alaska, was monitored in 1967. Breakup on this braided river was a relatively calm event, with gradual development of open-water channels from headwaters to mouth. Air temperature data at Big Delta, near the mouth of the river, indicated an accumulation of 30 positive degree-days (F) above 32F, using mean daily values, prior to first observation of continuous open water from headwaters to mouth; a corresponding value, but using maximum daily air temperatures, was 224 degree-days (F). A photographic sequence of breakup at several points along the river is included. (Author)
Descriptors : (*RIVERS, *ALASKA), (*ICE, RIVERS), SNOW, ATMOSPHERIC TEMPERATURE, PERIODIC VARIATIONS, MONITORS, FAILURE(MECHANICS), FREEZING, MELTING, PHOTOGRAPHY
Subject Categories : Snow, Ice and Permafrost
Distribution Statement : APPROVED FOR PUBLIC RELEASE