Tracking surface and subsurface deformation associated with groundwater dynamics following the 2019 Mirpur earthquake
Yükleniyor...
Dosyalar
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The Mirpur Mw 5.8 earthquake on September 24, 2019, producedextensive liquefaction-induced surface deformation (LISD) in the sur-rounding villages. Due to the complexity of seismic hazards and theoccurrence of their effects on a large spatial scale, the resulting sur-face, and subsurface deformation are often poorly resolved. To coverspatially extended LISD, the PSInSAR technique provided subsidenceand uplift rate values ranging from 110 to?145 mm/yr consistentwith the spatial distribution of the mapped liquefaction features. Themost prominent surface change occurred in Abdupur and Sang vil-lages. GPR measurements were conducted to map the near-surfacecracks produced by transported liquified sand into the shallow sub-surface layers and other liquefaction features (elevated groundwatertable, conductive clay pockets, fractures, sand dikes, and water-enriched zones). Thus, the GPR survey assisted in the reconstructionof these structural and hydrogeological features on the near surface.In addition, the highly vulnerable zones were identified and mappedusingspace-andground-basedremotesensingmeasurementssup-ported by the field observations. The results highlight the effective-ness of the proposed novel approach for detailed assessment of thecoseismic liquefaction-induced deformation on- and near-ground sur-faces by identifying areas prone to failure during earthquakes andthereby can help with hazard mitigation.
Açıklama
Anahtar Kelimeler
Earthquake, Coseismic effects, Liquefaction, Groundpenetrating radar (GPR), Geological survey
Kaynak
Geomatics, Natural Hazards and Risk
WoS Q Değeri
Q1
Scopus Q Değeri
Cilt
14
Sayı
1
Künye
Khan, M. Y., Saralioglu, E., Turab, S. A., & Muhammad, S. (2023). Tracking surface and subsurface deformation associated with groundwater dynamics following the 2019 Mirpur earthquake. Geomatics, Natural Hazards and Risk, 14(1).
