The Evaluation of Tectonic Activity in Eshtehard Plain Basin with Interferometry

Tectonic and constructional movements have always played an important role in geomorphological changes. Identifying the nature of recent constructional movements has been of importance in understanding and interpreting landforms. In this research constructional movements in Eshtehard and Qazvin, located in the south and southwest of Tehran and southern slope of Alborz Mount, are investigated using Radar interferometry and geomorphological map of the basin. This technique is done using the images of Sentinel 1, which is located in band C radar range, with the average wave-length of 5/6 GHz. Geomorphological map of study area is provided in ArcMap GIS software, using Google-Earth images, DEM, Geological map, field visit, and sampling of landforms. Sentinel 1 Radar images are received from European Satellite site. Monitor changes are applied in SNAP software. According to the results of Radar Interferometry from 2015/10/3 to 2017/10/2, the whole study basin is tectonically rising. However, the rate of uplift in west and northwest of basin is greater than eastern and southern parts. Investigating geomorphological evidences such as consecutive alluvial fans, deviation of alluvial fans and remnants of lake terraces is totally in accordance with results from Radar interferometry indicating a high tectonic deviation speed in northwest of basin, that is around the city of Qazvin and Takestan, comparing with south and south-western of the basin.