Geotectonic Critical Analysis with Emphasis on Active Remote Sensing (ASAR Sensor) Case study: Persepolis

Abstract

The main reason for subsidence in Iran is the large amount of water withdrawn from<br />underground resources, which, if not managed properly will cause irreparable<br />damages. To deal with such a problem, it is necessary to identify the subsidence areas.<br />Most country's ancient artifacts have been built on fertile plains, and due to the dryness<br />of the past decade, and the abundance of groundwater from the subsidence, it<br />accelerates the destruction of ancient works in these areas. In this research, the area of<br />Persepolis, which is 57 km northeast of Shiraz and 10 km north of Marvdasht city, is<br />based on the level of the land subsidence using differential radar interferometry<br />technique. Using Eoli-SA 9.4.3 software, two images were taken from the ASVAR<br />data series of the ENVISAT satellite. The data processing with SARSCAPE 4.3<br />software, a radar differential interference method, has been implemented at two<br />different times in a region. A new image called an interferogram or interferometer was<br />provided that contains the target geophysical information. Therefore, the amount of<br />subsidence or uplift was determined in the three interlaced states. During the research<br />period from 23/12/2004 to 17/12/2009, which is 1820 days, it has been clear that the<br />ancient area of Persepolis, the historic city of the pool and the role of Rustam between<br />two and three centimeters subsided, and the role of Rajab is also between the four has<br />seen up to five centimeters of subsidence.