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Short-term observation of beach dynamics using cross-shore profiles and foreshore sediment

DRS at CSIR-National Institute of Oceanography

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Title Short-term observation of beach dynamics using cross-shore profiles and foreshore sediment
 
Creator Dora, G.U.
SanilKumar, V.
Johnson, G.
Philip, C.S.
Vinayaraj, P.
 
Subject beach profiles
sediment texture
seasonal variations
 
Description Cross-shore beach profiles and textural characteristics of foreshore sediment were analyzed for understanding an annual cycle of intertidal beach dynamics at Devbag, an Island sheltered estuarine coast. Cross-shore transects were monitored in a monthly interval during February 2008 to February 2010 along with collection of beach surface sediment samples. Change in beach volume over an annual cycle showed a slow rate of sediment accretion at the Devbag beach where the maximum accretion was found at dissipative zone. During the year 2008e09, the volume of sediment accretion was 24.23 m sup(3)/m with an average beach width and slope of 91 m and 3.3 degrees respectively. During 2009-2010, the accreted beach volume was 33.54 m sup(3)/m with an average beach width and slope of 132 m and 2.6 degrees respectively. The beach along the coast was varying from extremely gentle to a slightly steeper slope which showed dissipative to reflective nature. The Beach was dominated by both fine and medium sands. More quantity of unimodal and bimodal sediment was found with moderately well sorted and moderately sorted nature. No significant correlation in beach morpho-sedimentary characteristics was found due to the non-uniform trend in beach morphodynamics and textural characteristics. Present study emphasizes the need to observe the beach changes over inter-annual seasons before planning coastal protection measures. The results of the study will be helpful for formulating an effective coastal zone management plan at Devbag, Kali estuary, west coast of India.
 
Date 2012-08-21T06:02:40Z
2012-08-21T06:02:40Z
2012
 
Type Journal Article
 
Identifier Ocean & Coastal Management, vol.67; 2012; 101-112
http://drs.nio.org/drs/handle/2264/4117
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2012] Elsevier
 
Publisher Elsevier