Record Details

Indications of an extreme event deposits along the west coast of India: evidences from GPR investigations

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Indications of an extreme event deposits along the west coast of India: evidences from GPR investigations
 
Creator Loveson, V.J.
Gujar, A.R.
Iyer, S.D.
Srivastava, P.
Tirodkar, G.
Luis, R.A.A.
 
Subject sediment
sand deposit
coastal zone
coastline regression
 
Description The ground-penetrating radar (GPR) was used to trace the subsurface details in the Palshet coastal zone (Maharashtra) as it exhibits an interesting array of geomorphological features. Furthermore, our main goal was to identify and locate features that might have formed during a reported extreme event and its effects on the flow of the nearby Sundri River. Two profiles (8 and 4 m depth) were collected across the beach and along the backshore, respectively. While the 8-m depth profile (west to east; across the beach) indicates a series of coastline regression in this area, the 4-m depth profile along the coastline (north to south) in the backshore zone reveals two significant incidents viz., (1) stages of development of the paleochannels that indicate the migration of the Sundri River towards south and (2) huge sediment deposits up to 2.5-m thick in the backshore area. The erosional relict surface (approx 2.5 m depth) was traced along with various spells of sediments that perhaps occurred due to an extreme event. Sand samples were collected from two trial pits along the GPR profiles to understand the sedimentology and mineralogy in the backshore area. These data together with beach profiles and geomorphological maps suggest that the sands were deposited by an extreme event perhaps during the 1854 cyclonic storm. The sands were trapped in suitable geomorphological sites along the Palshet coast and these sand deposits of about 2.5 m thickness forced the River Sundri to shift its course towards the south. This new revelation facilitates a further study that could focus on the nearby coastal areas to document such extreme event deposits and their influence on the geomorphic set-up.
 
Date 2014-12-04T11:57:32Z
2014-12-04T11:57:32Z
2014
 
Type Journal Article
 
Identifier Environmental Earth Sciences, vol.72(10); 2014; 4155-4166
http://drs.nio.org/drs/handle/2264/4652
 
Language en
 
Rights An edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2014] Springer.
 
Publisher Springer