Many earth flows occurred during the summer of 1979 in the hilly terrain near Umiat, Alaska, particularly along Henry Creek. Most were shallow, involving only the tundra mat and no more than 1.5 m of the underlying mud. The summer of 1979 was the warmest and wettest for the period of record at Umiat, and precipitation was characterized by brief but intense localized rainstorms. Failure probably was triggered by the heavy rains and facilitated by an absorbent tundra mat over a clayey substrate, and perhaps in some cases by a thicker than normal active layer. Flows of this kind have occurred repeatedly in the Umiat area, most likely during summers in which climatic conditions were similar to those of 1979.
Additional publication details
|Publication Subtype||Journal Article|
|Title||Earth flows along Henry Creek, northern Alaska|
|Publisher||Arctic Institute of North America|
|Other Geospatial||Colville River, Ikpikpuk River|
|Google Analytic Metrics||Metrics page|