Natural Stabilization of an Eroded Permafrost Siteby Richard J. Upton, ARCO Alaska Inc, Anchorage, AK, USA,
Abstract: The paper referred to in this abstract discusses the erosional processes during and after the initial failure, proposed solutions to repair and stabilize the site, and details of the performance of the site during the natural restabilization chosen as the preferred solution. Major points of the paper are as follows. Highly concentrated flow over a large vertical drop resulted in the initial erosional failure. Exposure of permafrost to thawing temperatures and continued streamflow resulted in an enlarged but more stable configuration after one summer. Several proposed earthwork and/or stream diversion solutions could have led to fast albeit high cost site stabilization. Natural restabilization resulted in a stable site with little additional erosion beyond the first summer.
Subject Headings: Erosion | Permafrost | Failure analysis | Temperature effects | Soil water | Soil stabilization | Sediment transport | Streamflow
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