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Bluff Landslide Monitoring

Where are the current landslides and slumps on the bluff above the beachside homes? Which areas on the bluff are most likely to slide, or to slide more than last winter? Where could geotechnical analyses and slide mitigation efforts be most effective at reducing risk to properties at the top or bottom of the bluff?

This 3D geospatial model enabled the trustees of a homeowners association to work with a geotechnical engineer to assess the relative risk of additional slides or slumps along the length of the bluff. The model also enabled very clear visualization of the location and extent of landslide problem areas by all members of the community, to improve discussions about mitigation efforts and investments. The number, location, age and kinds of trees, bushes and other vegetation can be evaluated for their soil-holding capability now and in future years. Contours and drainage direction arrows indicate those areas where risk may be increasing. The approximate boundaries of problem areas on the slope of the bluff can be easily identified to enable onsite marking to guide crews which are contracted to install coir ropes or apply other erosion mitigation techniques.

To provide more information, Aerial Whidbey's operator guided a drone to hover near each slide area to record a spherical 360-degree image. Each image enables looking closely at the problem area while also looking around at the context below, above and on each side. Due to website limitations, explore the example images on the '360 Images' page (main menu).

Project images/videos - select for more details

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