Monitoring the quality changes of surface water resources affected by earthquakes (case study: Sarpol Zahab-Ezgole earthquake on 21 November, 2016)

In addition to damaging structural effects, earthquakes also have adverse environmental effects, including polluting water resources. In this article, the quality changes of surface water resources due to earthquakes are monitored. In the present research, in order to achieve the above goal, by using various data from Sunnynell 1 satellites, optical data from Landsat 8, and Madis satellite images, the data has been unified in such a way that they can be used together in the form of a dataset for processing. be placed In this research, by using the combination of satellite images (radar and optics), the Starfam algorithm, the spectral signature of Sentinel 1 data and the use of remote sensing indicators (MNDWI, NDVI and RGB color combination), water resources The studied area was identified and then the quality changes of surface water resources affected by the earthquake were obtained in the environment of ARC GIS and SNAP SANTINEL software. The results show that the earthquake caused shaking and displacement of the surface and subsurface layers of the earth and due to the karstic location of the studied area, it caused an increase in the concentration of dissolved anions and cations in water. In the studied area, the role of faults is very obvious. According to the geological structure of Zagros, Sarpol-Zahab city has numerous faults and the most changes of water resources are located in the main path of the faults and follow the fault lines of the region. Also, in terms of geology,