Investigation of subsidence of different parts of Marvdasht plain using ENVISATASAR radar images with C-wavelength of South Zagros region

Subject Areas : Journal of Radar and Optical Remote Sensing and GIS

Alireza  Karimi ¹ (Master of Remote Sensing and GIS, Organization of Natural Resources and Agriculture Engineering System, Iran)

Received: 2021-07-09 Accepted : 2022-02-20 Published : 2022-03-01

Keywords: Groundwater, Geology, Subsidence, plain, ASAR images,

Abstract :

According to UNESCO, subsidence is the collapse or subsidence of the earth's surface that occurs on a large scale for a variety of reasons.Land subsidence is the gradual subsidence or sudden subsidence of the earth's surface. Land subsidence due to the movement of materials underground is often caused by the removal of water, oil, natural gas or mineral resources from the ground by pumping, breaking parts or mining activities. As a result, deep cracks are created in the ground, well pipes are tilted, buildings are destroyed or cracked, and part of the well pipes are pushed out of the ground.In this article, using ENVISAT ASAR radar images, C band is related to the years 2006-2009 using ENVI5.3.1 software, SARSCAPE plugin. After performing PHASE TO DISPLACEMENT CONVERSION AND GEOCODING, we obtained the subsidence map. The subsidence obtained from the maps was between -18 to +12 related to agricultural plains, river banks, mountain falls and deposits due to rainfall and soil dissolution due to geological type. In the plains, subsidence has probably occurred due to the drop in groundwater. Consecutive droughts and uncontrolled groundwater abstraction and lack of management in abstraction in the future will be witnessed by severe crises in various regions