EP41A-3503:
Viscoelastic Deformation Due to Sediment Loading in the Ganges-Brahmaputra Delta and in the Bay of Bengal.
EP41A-3503:
Viscoelastic Deformation Due to Sediment Loading in the Ganges-Brahmaputra Delta and in the Bay of Bengal.
Thursday, 18 December 2014
Abstract:
Sedimentation is a major cause of long-term subsidence in the Ganges-Brahmaputra Basin.We estimate the vertical crustal velocities induced by sediment discharge in
the Ganges-Brahmaputra-Meghna Delta (GBMD) by using a realistic viscoelastic Earth model.
The ancient sediment loading is inferred from the available chronostratigraphic data and
the present-day loading is estimated from the river discharges.
The model is constrained by geological data and the GPS vertical velocities.
The contribution and spatial pattern of the present-day elastic subsidence in the GBMD is compared
with that due to Holocene sedimentation and with the subsidence rates induced by sediment compaction.
The model provides new insights on possbile links between the climate changes, the river discharges
and the relative sea level variations along the GBMD coast.