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):

Report Date:

1971-04-01

Pagination or Media Count:

37.0

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

Subject Categories:

  • Snow, Ice and Permafrost

Distribution Statement:

APPROVED FOR PUBLIC RELEASE