Aerial Photointerpretation of a Small Ice Jam

Abstract

Aerial photos of a small ice jam on the Pemigewasett River near Plymouth, New Hampshire, were taken three days after the jam and compared with photos taken after the ice went out. The winter photos show a marked and sudden decrease in floe size apparently indicative of faster and longer movement of the ice. The spring photos show a number of shallows and obstructions that apparently had no effect on the ice movement. It is concluded that this jam was caused by a change in slope and subsequent reduction in velocity.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1977
Accession Number
ADA045870

Entities

People

  • Stephen L. Denhartog

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerial Photographs
  • Aerial Photography
  • Cameras
  • Classification
  • Cold Regions
  • Engineering
  • New Hampshire
  • Observation
  • Photographic Materials
  • Photographs
  • Photography
  • Regions
  • Security
  • Water

Readers

  • Computer Vision.
  • Mathematics or Statistics
  • Polar and Arctic Studies