Evaluation of Erosion Potential of Bare and Vegetated Cut/Fill Slopes ofDecomposed Granite at Buckhorn Summit

摘要

In order to monitor the causes of rain-induced erosion and permafrost erosion,the experimental cut hillslope which was located adjacent to highway 299 at Buckhorn summit in Northern California was heavily instrumented. This instrumentation included one big raingage for measuring rainfall, 3 small raingages for measuring subsurface flows at each section of the experimental site, 12 temperature probes for measuring temperature at the top 30 cm of soil at each section of the site, 3 net-radiometers for measuring net solar-radiation at each section of the site and a V-notch weir for measuring surface flows. The mitigation of erosion over bare cut slopes, and hillslope stability methods are described and discussed. Particular emphasis is placed on the performance of vegetation and bio-technical slope protection methods. Also, an extensive literature review was performed on permafrost erosion and is presented in this report.