USGS - Science for a Changing World USGS graphic link to USGS home page.

U.S. GEOLOGICAL SURVEY
Water-Resources Investigations Report 01-4089

Photogrammetric Data Set, 1957-2000, and Bathymetric Measurements for Columbia Glacier, Alaska

By Robert M. Krimmel

ABSTRACT

Major changes in the length, speed, surface altitude, and calving rate of Columbia Glacier, Alaska have been recorded with stereo vertical photography acquired on 119 dates from 1957 to 2000. Photogrammetric analysis of this photographic record has resulted in precise measurement of these changes. From 1982 to 2000 Columbia Glacier retreated 12 kilometers, reduced its thickness by as much as 400 meters, increased its speed from about 5 to 30 meters per day, and increased its calving rate from 3 to 18 million cubic meters per day. All photogrammetric data for Columbia Glacier from 1957 to 2000 are included in this report, as well as supplemental data of ice-dammed lake surface levels, stagnant ice ablation rate, forebay bathymetry, ground control, and camera calibrations. These data are contained in 481 files, all preserved on a CD-ROM included with this report.

CONTENTS

Abstract
Introduction
Data Acquired
Data Files and Storage
Other Sources for These Data Types
Conclusions
References

This report is available online in Portable Document Format (PDF). If you do not have the Adobe Acrobat PDF Reader, it is available for free download from Adobe Systems Incorporated.

Download the report (PDF, 2.3 MB)

Document Accessibility: Adobe Systems Incorporated has information about PDFs and the visually impaired. This information provides tools to help make PDF files accessible. These tools convert Adobe PDF documents into HTML or ASCII text, which then can be read by a number of common screen-reading programs that synthesize text as audible speech. In addition, an accessible version of Acrobat Reader 5.0 for Windows (English only), which contains support for screen readers, is available. These tools and the accessible reader may be obtained free from Adobe at Adobe Access.

Send questions or comments about this report to the author, Robert Krimmel (rkrimmel@usgs.gov) 253.428.3600 ext. 2647.

For more information about USGS activities in Washington, visit the USGS Washington District home page.



U.S. Department of the Interior, U.S. Geological Survey
Persistent URL: http://pubs.water.usgs.gov/wri014089
Page Contact Information: GS Pubs Web Contact
Last modified: Thursday, September 01 2005, 05:03:04 PM
FirstGov button  Take Pride in America button