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<p>Seismic activities and changes in water table are among the factors that affect the extent of land deformation. In this study, the impact of seismicity trends and changes in the water table on land deformation is examined in two selected areas in Kermanshah, Iran. By employing data from selected piezometers, it was determined that land displacement in the eastern study area is strongly influenced by changes in the water table. On the other hand, the study of piezometers in the western study area shows that the displacement does not follow the changes in water table between November 2017 and July 2019, a period that began with the devastating Ezgeleh earthquake in November 2017. The analysis of seismicity parameters indicates a significant influence of events occurring at depths greater than 10&#xa0;km in the western study area. In the b-value zoning maps for events shallower and deeper than 10&#xa0;km, only the 0.52 b-value contour of the deeper events exhibits a noticeable alignment with the active faults in the region. The greatest amount of deformation following the mainshock is observed in the southwestern part of the western study area, which also experienced the highest increase in deep seismic events during the period from November 2017 to July 2019. This coincides with a notable decrease in the b-value for events deeper than 10&#xa0;km in this section. Furthermore, in this part of the study area, the time series of land deformation closely aligns with the cumulative number of seismic events.</p>

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The impact of seismic trends and groundwater level on land deformation: a case study of the Western and Eastern areas of Kermanshah Province, West of Iran

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Mojtaba Heidari,
  • Bahman Saedi,
  • Naser Mahdiabadi,
  • Seyed Hossein Jalali

摘要

Seismic activities and changes in water table are among the factors that affect the extent of land deformation. In this study, the impact of seismicity trends and changes in the water table on land deformation is examined in two selected areas in Kermanshah, Iran. By employing data from selected piezometers, it was determined that land displacement in the eastern study area is strongly influenced by changes in the water table. On the other hand, the study of piezometers in the western study area shows that the displacement does not follow the changes in water table between November 2017 and July 2019, a period that began with the devastating Ezgeleh earthquake in November 2017. The analysis of seismicity parameters indicates a significant influence of events occurring at depths greater than 10 km in the western study area. In the b-value zoning maps for events shallower and deeper than 10 km, only the 0.52 b-value contour of the deeper events exhibits a noticeable alignment with the active faults in the region. The greatest amount of deformation following the mainshock is observed in the southwestern part of the western study area, which also experienced the highest increase in deep seismic events during the period from November 2017 to July 2019. This coincides with a notable decrease in the b-value for events deeper than 10 km in this section. Furthermore, in this part of the study area, the time series of land deformation closely aligns with the cumulative number of seismic events.