Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

Land subsidence is a worldwide phenomenon, where there is a sudden sinking or gradual downward settling of the earth's surface with little or no horizontal motion. In Iran, this phenomenon is noticed to take place in many areas among which are Meshhed, Kerman, Tehran, Hamedan and others. In some of the above areas, water well installations seem to rise into the air, or some times to produce fissures in the soil and/or showing sinkhole in carbonated rocks. Land subsidence could causes damages in surface and subsurface installations. UNISCO was concerning with this worldwide phenomenon and tried to study it in different parts of the world through groups of work by using GPS, SAR and InSAR techniques that uses radar satellite image. The Iranian authorities in cooperation with others were interesting to see the extension and reasons for Tehran's land subsidence by using the new InSAR techniques, which assured later on the existence of 2 profiles (namely NE-SW profile 1 and N-S profile 3) in a V shape in SW Tehran with 15 cm and 16 cm Land subsidence respectively. The subsidence is mainly due to depletion of aquifer (i.e. water level drop), which causes aquifer compaction.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Aug 11th, 12:00 AM Aug 16th, 12:00 AM

Land Subsidence in Tehran District, Iran

Arlington, Virginia

Land subsidence is a worldwide phenomenon, where there is a sudden sinking or gradual downward settling of the earth's surface with little or no horizontal motion. In Iran, this phenomenon is noticed to take place in many areas among which are Meshhed, Kerman, Tehran, Hamedan and others. In some of the above areas, water well installations seem to rise into the air, or some times to produce fissures in the soil and/or showing sinkhole in carbonated rocks. Land subsidence could causes damages in surface and subsurface installations. UNISCO was concerning with this worldwide phenomenon and tried to study it in different parts of the world through groups of work by using GPS, SAR and InSAR techniques that uses radar satellite image. The Iranian authorities in cooperation with others were interesting to see the extension and reasons for Tehran's land subsidence by using the new InSAR techniques, which assured later on the existence of 2 profiles (namely NE-SW profile 1 and N-S profile 3) in a V shape in SW Tehran with 15 cm and 16 cm Land subsidence respectively. The subsidence is mainly due to depletion of aquifer (i.e. water level drop), which causes aquifer compaction.