Monitoring ground subsidence induced by over – extraction of groundwater using Interferometric SAR (InSAR): Golpayegan plain case study
Kobra Jannat(1), Akbar Ghazifard(1) and Mahasa Roustaie(2)
(1) Isfahan University, Geology dept, Isfahan university,Isfahan,Iran, 8174673441, Iran
(2) Remote Sensing Group, Geological Survey of Iran, 8174673441, Iran
According to Pipkin (1994), the process that causes a sudden vertical movement and displacement of earth surface is called subsidence. Human activities, especially excessive groundwater withdrawal and geological actions are two main causes for land surface subsidence. This phenomenon exerts a lot of damages to human, agricultural lands, farms, urban buildings and city utilities in many parts of the world. In Golpayegan plain of Iran this phenomenon has also caused earth fissuring and cracking of homes and buildings. Measurement of rate and characteristics of subsidence can provide valuable data for assessing the impacts of ground subsidence and for preventing its hazards. One of methods to measure the rate of subsidence and determine its properties is Interferometric Synthetic Aperture Radar (InSAR) technique. This technique reached some maturity over the last few years.
In other to determine rate and properties of Ground subsidence: First SAR data were collected and second they were evaluated by GAMMA software.
So in this paper this technique was explained and the rate and properties of ground subsidence in Golpayegan plain were evaluated by InSAR technique.