Advances in Unstable Slope Instrumentation and Monitoring (2020) / Chapter Skim
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Pages 6-14
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6 Literature Review 2.1 Literature Review This discussion summarizes a literature review of slope instrumentation and monitoring technology that became available within approximately the last decade in the United States and internationally. In general, the unstable slope instrumentation and monitoring techniques that have advanced during this period address detection of movement from a distance, increased quantity of data at more frequent intervals, change detection, and updates to existing technologies.
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Literature Review 7 A survey of European practice reported that most agencies (83% that answered survey) use remote sensing for both landslide detection/mapping and monitoring, while a few (17%)
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8 Advances in Unstable Slope Instrumentation and Monitoring The measurement parameters that can be obtained with this technology include displacement, orientation of surface features, and elevation. Measurement accuracy can be on the order of centimeters for ground-based (terrestrial)
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Literature Review 9 Satellite Imagery In approximately the last decade, passive optical imaging in the remote sensing of unstable slopes from satellite platforms has improved in (1) ground sampling distance (due to transfer delay and integration sensors like IKONOS, Quickbird)
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10 Advances in Unstable Slope Instrumentation and Monitoring Interferometric Synthetic Aperture Radar Interferometric Synthetic Aperture Radar (InSAR) is a remote-sensing technology that can obtain measurements of ground surface deformation, often at regular intervals and enabling change detection of unstable slopes.
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Literature Review 11 began in May 2009 and concluded in April 2012 and involved 27 agency and university partners from 12 European countries. The project also included collaboration with advisors from the United States, China, India, Japan, and Hong Kong.
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12 Advances in Unstable Slope Instrumentation and Monitoring and quantity of data collection, greater data storage and transmission capabilities, and viewing and use of data. Examples of advancements to installed geotechnical instrumentation are summarized below.
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Literature Review 13 often incorporated into new construction for bridges, walls, and dams. There are some examples of fiber optic sensor use to measure differential displacements in unstable slope applications (Liu et al., 2010; Zhu et al., 2011)
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14 Advances in Unstable Slope Instrumentation and Monitoring deformation, such as in unstable slope masses. Even though this is not a new technique and its use in landslide applications is limited, advancements in the past decade have overcome previous limitations such as the need for secure instrument housing and electricity.
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