Landslides are a natural hazard. Inflicting serious and magnified injury and loss of human life, damage to properties and infrastructures has been noticed throughout the world due to landslides. Landslide varies from extremely large to prolonged movements of slopes to an angle at which they possess maximum stability. It is a gravity-induced sub-aerial and submarine mass movement of rocks and soil mass triggered by various natural (rainfall, volcanic eruption, earthquakes) and anthropogenic (cutting of slopes) activities. In this context, the present study is considered for the Morni Hill area of the Shiwalik Himalayas in the Panchkula District of Haryana, to analyze the geomorphological setting in and around Umri village and understand how geomorpho-tectonic features in inducing landslides. The indicators of landslides are identified by multiple factors, including geological, geomorphological, structural, hydrological, and land use land cover. This study is, based on field observation; eight indicators were selected including lithology, geomorphology, hydrology, and lineaments. The heavy rainfall of southwest monsoons has been identified as a triggering factor of landslides in the study area on top of the unique geomorphic setting. The study infers that the study area is prone to slope instability due to its geological composition. The dominant rock types, boulder bed and red clay stone, are easily eroded by water. The red clay stone, in particular, becomes very weak when wet, leading to slope failures. The varied rock types and the linear ridge shape further contribute to the instability.

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Geomorpho-tectonic Characterization of Umri Landslide Haryana, India

  • Shanku Ghosh,
  • C. Prakasam

摘要

Landslides are a natural hazard. Inflicting serious and magnified injury and loss of human life, damage to properties and infrastructures has been noticed throughout the world due to landslides. Landslide varies from extremely large to prolonged movements of slopes to an angle at which they possess maximum stability. It is a gravity-induced sub-aerial and submarine mass movement of rocks and soil mass triggered by various natural (rainfall, volcanic eruption, earthquakes) and anthropogenic (cutting of slopes) activities. In this context, the present study is considered for the Morni Hill area of the Shiwalik Himalayas in the Panchkula District of Haryana, to analyze the geomorphological setting in and around Umri village and understand how geomorpho-tectonic features in inducing landslides. The indicators of landslides are identified by multiple factors, including geological, geomorphological, structural, hydrological, and land use land cover. This study is, based on field observation; eight indicators were selected including lithology, geomorphology, hydrology, and lineaments. The heavy rainfall of southwest monsoons has been identified as a triggering factor of landslides in the study area on top of the unique geomorphic setting. The study infers that the study area is prone to slope instability due to its geological composition. The dominant rock types, boulder bed and red clay stone, are easily eroded by water. The red clay stone, in particular, becomes very weak when wet, leading to slope failures. The varied rock types and the linear ridge shape further contribute to the instability.