Characterizing Landslide Movement at the Boulder Creek Earthflow, Northern California, Using L-band InSAR
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Date
2009-09
Authors
Stimely, Laura Lyn, 1982-
Journal Title
Journal ISSN
Volume Title
Publisher
University of Oregon
Abstract
Spatial and temporal patterns of movement of the Boulder Creek earthflow were
investigated using 26 interferograms derived from ALOS satellite radar images acquired
between February 2007 and February 2008. Persistently unstable hillslopes in Northern
California are ideally suited to the study of the dynamics and morphological signature of
earthflows, as the deeply sheared melange lithology, high seasonal rainfall, and fast uplift
rates promote widespread deep-seated landsliding. In addition to identifying multiple
active landslides in the region, L-band InSAR reveals varying deformation rates in the
accumulation, transport, and toe regions of the Boulder Creek earthflow. Downslope
displacement rates up to 1.8 m/yr are observed on the earthflow over a I-year period. The
pattern of deformation is similar to that observed from 1944-2006 inferred from aerial
photography. Interferograms highlight spatially variable rates controlled by lithology and
gullies, and movement correlates with seasonal rainfall with a phase lag of ~2 months.
Description
ix, 60 p. : col. ill. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.
Keywords
Earthflows -- California -- Boulder Creek