The lowest place on Earth is subsiding—An InSAR (interferometric synthetic aperture radar) perspectiveстатья из журнала
Аннотация: Research Article| January 01, 2002 The lowest place on Earth is subsiding—An InSAR (interferometric synthetic aperture radar) perspective Gidon Baer; Gidon Baer 1Geological Survey of Israel, 30 Malkhe Yisrael Street, Jerusalem 95501, Israel Search for other works by this author on: GSW Google Scholar Uri Schattner; Uri Schattner 2Geological Survey of Israel, 30 Malkhe Yisrael Street, Jerusalem 95501, Israel, and Department of Geophysics and Planetary Sciences, Tel Aviv University, Ramat Aviv 69978, Israel Search for other works by this author on: GSW Google Scholar Daniel Wachs; Daniel Wachs 3Geological Survey of Israel, 30 Malkhe Yisrael Street, Jerusalem 95501, Israel Search for other works by this author on: GSW Google Scholar David Sandwell; David Sandwell 4Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92093-0225, USA Search for other works by this author on: GSW Google Scholar Shimon Wdowinski; Shimon Wdowinski 5Department of Geophysics and Planetary Sciences, Tel Aviv University, Ramat Aviv 69978, Israel Search for other works by this author on: GSW Google Scholar Sam Frydman Sam Frydman 6Faculty of Civil Engineering, Technion–Israel Institute of Technology, Haifa 32000, Israel Search for other works by this author on: GSW Google Scholar Author and Article Information Gidon Baer 1Geological Survey of Israel, 30 Malkhe Yisrael Street, Jerusalem 95501, Israel Uri Schattner 2Geological Survey of Israel, 30 Malkhe Yisrael Street, Jerusalem 95501, Israel, and Department of Geophysics and Planetary Sciences, Tel Aviv University, Ramat Aviv 69978, Israel Daniel Wachs 3Geological Survey of Israel, 30 Malkhe Yisrael Street, Jerusalem 95501, Israel David Sandwell 4Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, La Jolla, California 92093-0225, USA Shimon Wdowinski 5Department of Geophysics and Planetary Sciences, Tel Aviv University, Ramat Aviv 69978, Israel Sam Frydman 6Faculty of Civil Engineering, Technion–Israel Institute of Technology, Haifa 32000, Israel Publisher: Geological Society of America Received: 06 Nov 2000 Revision Received: 29 Jun 2001 Accepted: 21 Aug 2001 First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2002) 114 (1): 12–23. https://doi.org/10.1130/0016-7606(2002)114<0012:TLPOEI>2.0.CO;2 Article history Received: 06 Nov 2000 Revision Received: 29 Jun 2001 Accepted: 21 Aug 2001 First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Gidon Baer, Uri Schattner, Daniel Wachs, David Sandwell, Shimon Wdowinski, Sam Frydman; The lowest place on Earth is subsiding—An InSAR (interferometric synthetic aperture radar) perspective. GSA Bulletin 2002;; 114 (1): 12–23. doi: https://doi.org/10.1130/0016-7606(2002)114<0012:TLPOEI>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Since the early 1990s, sinkholes and wide, shallow subsidence features (WSSFs) have become major problems along the Dead Sea shores in Israel and Jordan. Sinkholes are readily observed in the field, but their locations and timing are unpredictable. WSSFs are often difficult to observe in the field. However, once identified, they delineate zones of instability and increasing hazard. In this study we identify, characterize, and measure rates of subsidence along the Dead Sea shores by the interferometric synthetic aperture radar (InSAR) technique. We analyze 16 SAR scenes acquired during the years 1992 to 1999 by the European Remote Sensing ERS-1 and ERS- 2 satellites. The interferograms span periods of between 2 and 71 months. WSSFs are observed in the Lisan Peninsula and along the Dead Sea shores, in a variety of appearances, including circular and elongate coastal depressions (a few hundred meters to a few kilometers in length), depressions in ancient alluvial fans, and depressions along salt-diapir margins. Phase differences measured in our interferograms correspond to subsidence rates generally in the range of 0–20 mm/yr within the studied period, with exceptional high rates that exceed 60 mm/yr in two specific regions. During the study period, the level of the Dead Sea and of the associated ground water has dropped by ∼6 m. This water-level drop within an aquifer overlying fine-grained, marly layers, would be expected to have caused aquifer-system consolidation, resulting in gradual subsidence. Comparison of our InSAR observations with calculations of the expected consolidation shows that in areas where marl layers are known to compose part of the upper 30 m of the profile, estimated consolidation settlements are of the order of the measured subsidence. Our observations also show that in certain locations, subsidence appears to be structurally controlled by faults, seaward landslides, and salt domes. Gradual subsidence is unlikely to be directly related to the sinkholes, excluding the use of the WSSFs features as predictable precursors to sinkhole formation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Год издания: 2002
Издательство: Geological Society of America
Источник: Geological Society of America Bulletin
Ключевые слова: Synthetic Aperture Radar (SAR) Applications and Techniques, Geophysical Methods and Applications, earthquake and tectonic studies
Открытый доступ: closed
Том: 114
Выпуск: 1
Страницы: 12–23