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Coastal processes and longshore sediment transport along Kundapura coast, central west coast of India.

DRS at CSIR-National Institute of Oceanography

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Title Coastal processes and longshore sediment transport along Kundapura coast, central west coast of India.
 
Creator Shanas, P.R.
SanilKumar, V.
 
Subject geomorphology
sediment transport
 
Description Longshore sediment transport (LST) is one of the main factors influencing coastal geomorphology. This study examines the variation in the LST estimate using four well known formulae and the sensitivity of wave parameters on LST determination. The study was done along the Kundapura coast, central west coast of India. The Delft3D-wave module was used for obtaining the nearshore wave characteristics from the wave data measured using Datawell directional wave rider buoy at 12 m water depth for a period of one year. Diurnal change and seasonal variation in LST were examined. The study shows that the net LST was toward north for most of the time (non-monsoon period) during the year when predominant wave direction was between SWS and SW, whereas the LST was toward south during the monsoon season when the wave direction was from the west. It was found that the influence of breaker height was more during the non-monsoon period whereas during the monsoon period, breaker angle shows more influence on LST. Estimated annual net LSTR for the region is 3.6, 3.0, 1.6, and 2.6 × 105 m3 based on the CERC, Walton and Bruno, Kamphuis and Komar formulae. The LSTR estimate based on the Kamphuis formula, which also includes the wave period, beach slope, and sediment grain size, was found to be a reliable estimate for the study region. The variation in LSTR estimate considering different data intervals was also examined and found that the difference in monthly LSTR for data intervals of 6, 12 and 24 h with respect to the 3 h interval was up to 11, 13 and 24%. For better and more accurate estimates of LSTR, the data interval should be 3 h or less.
 
Date 2014-08-06T12:38:18Z
2014-08-06T12:38:18Z
2014
 
Type Journal Article
 
Identifier Geomorphology, vol.214; 2014; 436–451.
no
http://drs.nio.org/drs/handle/2264/4569
 
Language en
 
Relation Geomorphology_214_436.jpg
 
Rights An edited version of this paper was published by Elsevier. Copyright [2014] Elsevier
 
Publisher Elsevier