文章基本信息

标题：Monitoring of Hashtgerd Land Subsidence Induced by Overexploitation of Groundwater Using SAR Interferometry
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作者：M. Dehghani ; M. J. Valadan Zoej ; M. J. Bolourchi 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII-B8
页码：365-368
出版社：Copernicus Publications
摘要：It was recognized that a large area in Hashtgerd plain, in the vicinity of Tehran, is subject to the land subsidence. GPS continuous measurements and precise leveling surveys carried out by National Cartographic Center of Iran (NCC) recognized the land subsidence occurrence in Hashtgerd. To map the extent and pattern of the subsidence in southwest of Tehran, the Interferometric SAR (InSAR) method was used. The subsidence contains one main lobe which agrees very well with the cultivated lands. Two interferograms were processed using 4 ENVISAT ASAR raw images obtained from track 149. One interferogram spanning the summer season in which the groundwater is over-extracted contains the subsidence signal up to 7 cm within 35 days. The other interferogram due to the winter recovery season contains strong uplift effects. It was recognized that the piezometers information is not in agreements with pumping wells depths. It was assumed that another aquifer system may exist in Hashtgerd area. InSAR- derived subsidence pattern significantly fits the aquifer system hypothetical boundary. Therefore, the InSAR data proves the existence of a confined aquifer system from which the groundwater is pumped out
关键词：Interferometry; Subsidence; Aquifer; Remote Sensing; Geology; Change Detection; SAR; Acquisition