Emerging Applications of InSAR in Geomorphology and Hydrology(文章): Emerging Applications of InSAR in Geomorphology and Hydrology.pdf

Emerging Applications of Interferometric Synthetic Aperture Radar (InSAR) in Geomorphology and Hydrology

Laurence C. Smith
Department of Geography, University of California, Los Angeles
14页。

Interferometric  synthetic aperture  radar  (InSAR)  is a powerful geodetic  tool used  to construct digital elevation
models of the earth’s topography and to image centimeter-scale displacements associated with crustal deformation
and the flow of ice sheets. The past decade has seen significant improvements in our understanding of earthquakes,
volcanoes, and glaciers as a direct result of this technology. Geomorphology and hydrology can also benefit from
InSAR. A small but growing body of work shows that it is possible to interferometrically measure centimeter-scale
motions associated with unstable slopes, land subsidence, fluctuating soil moisture and water levels, and deforming
river-ice cover. Maps of interferometric correlation provide information about the structure of snow and reveal areas
disturbed by erosion, sedimentation, flooding, snowfall, and aufeis growth. At present, such techniques are under-
developed and largely overlooked by the geographic and radar communities. This article reviews these emerging
geomorphic and hydrologic applications of InSAR and presents a first demonstration of motion detection for river
ice. Key Words: erosion, floods, hillslopes, interferometry, land subsidence, river ice, SAR, snow, soil moisture.

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