Natural and man-made hazards in Iran: lessons learned from space technologies

سال انتشار: 1394
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 447

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شناسه ملی سند علمی:

INDM07_168

تاریخ نمایه سازی: 27 بهمن 1394

چکیده مقاله:

In this presentation we present the results of several research projects in which we used Space-borne Interferometric Synthetic Aperture Radar (InSAR) method to investigategeophysical processes related to natural and man-made hazards in Iran. Because of its dense spatial coverage, competitive accuracy and frequent observation capability in different wavelengths, InSARenables detection of deformations of the Earth's surface athigh levels of detail in space and time and improve our study of the underlying sources andprocesses associated with them. Our capabilities for hazard monitoring have been furtherenhanced, partly due to advances in processing techniques, and partly due to avalanche of radar data provided by old and new satellite missions. In particular, the use of satellite radar data from recently launched Sentinel-1A imagery, which will be acquiredsystematically over all global landmasses with data acquisitions being made every 12 days(6 days once Sentinel-1B is launched in 2016) provides scientists, civilians and decisionmakers with an unprecedented opportunity for operational and near real-time 2D monitoring and assessment of deformation processesusing this space-based technology, and eventually contribute for a better evaluation of natural and man-made hazards.In Iran anthropogenic processes contribute substantial subsidence and load deformationsthat have important consequences for hazards management. In view of the high spatialresolution, hot-spots of ground motions need to be detected and communicated in near real-time to local decision makers. In this presentation we give an overview of the recent advances in SAR Interferometry, and present the results of several case studies where themethodhas beensuccessfully used to investigate a variety of mass wasting processes including aquifer-system compaction due to groundwater overexploitation, sinkhole deformation, landslide and erosional processes in Iran.

نویسندگان

Mehdi Motagh

GFZ German Research Center for Geosciences, Department of Geodesy, Section of Remote Sensing,14473Potsdam, Germany.