Open-File Report 2005-1405

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Landslide Susceptibility Estimated From Mapping Using Light Detection and Ranging (LIDAR) Imagery and Historical Landslide Records, Seattle, Washington

By William H. Schulz

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Abstract

Landforms in Seattle, Washington, that were created primarily by landsliding were mapped using LIDAR-derived imagery. These landforms include landslides (primarily landslide complexes), headscarps, and denuded slopes. Over 93 percent of about 1,300 reported historical landslides are located within the LIDAR-mapped landform boundaries. The spatial densities of reported historical landslides within the LIDAR-mapped landforms provide the relative susceptibilities of the landforms to past landslide activity. Because the landforms were primarily created by prehistoric landslides, the spatial densities also provide reasonable estimates of future landslide susceptibility. The mapped landforms and susceptibilities provide useful tools for landslide hazard reduction in Seattle.

Version 1.0

Posted December 2005
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Contains
Landslide database, GIS and shapefiles;
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