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Open-File Report 2012–1121

Thermal and Hydrological Observations near Twelvemile Lake in Discontinuous Permafrost, Yukon Flats, Interior Alaska, September 2010–August 2011

By Steven M. Jepsen, Joshua C. Koch, Joshua R. Rose, Clifford I. Voss, and Michelle A. Walvoord

Thumbnail of and link to report PDF (6.26 MB)Abstract

A series of ground-based observations were made between September 2010 and August 2011 near Twelvemile Lake, 19 kilometers southwest of Fort Yukon, Alaska, for use in ongoing hydrological analyses of watersheds in this region of discontinuous permafrost. Measurements include depth to ground ice, depth to water table, soil texture, soil moisture, soil temperature, and water pressure above the permafrost table. In the drained basin of subsiding Twelvemile Lake, we generally find an absence of newly formed permafrost and an undetectable slope of the water table; however, a sloping water table was observed in the low-lying channels extending into and away from the lake watershed. Datasets for these observations are summarized in this report and can be accessed by clicking on the links in each section or from the Downloads folder of the report Web page.

First posted July 18, 2012

For additional information:
Branch of Regional Research,
U.S. Geological Survey
Box 25046, Mail Stop 418
Denver, CO 80225
http://water.usgs.gov/nrp/

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Suggested citation:

Jepsen, S.M., Koch, J.C., Rose, J.R., Voss, C.I., and Walvoord, M.A., 2012, Thermal and hydrological observations near Twelvemile Lake in discontinuous permafrost, Yukon Flats, interior Alaska, September 2010–August 2011: U.S. Geological Survey Open-File Report 2012–1121, 25 p.



Contents

Abstract

Introduction

Site Description

Methods

Thermal and Hydrological Observations

Acknowledgments

References Cited

Appendix 1: Description of Data Files


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