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Journal of Marine Science and Application 2022年第1期21卷 128-139页

作者： Vallam Sundar sannasi annamalaisamy sannasiraj Sukanya Ramesh Babu Dipak Kumar Maiti Department of Ocean Engineering Indian Institute of Technology MadrasChennai 600036India West Bengal State Fisheries Development Corporation Limited Kolkata 700091India

The Sagar Island,located north of the Bay of Bengal,intercepts the flow in the Hoogly estuary that comprises a network of several estuarine distributaries and creeks,which is considered to be one of the largest estuarine systems in the *** Hooghly River experiences a tidal range in the order of about 4 m,due to which the tide-generated currents drive the sediments which are continuously set in *** temple,Kapil Muni(21°38'15.35"N,88°4'30.56"E)is located on the south-western side of Sagar Island,where an annual religious festival and rituals with about a million pilgrims is *** pertinent erosion problem at a rate of about 5 m/year is prevalent at the site has considerably reduced the beach width,thereby,resulting in reduced space for religious as well as recreational activities along the coast.A novel cross-section for the proposed submerged reef using geosynthetic materials is designed considering the different sitespecific,environmental,and socio-economic *** submerged reef can effectively be devised to redistribute the current circulation pattern and trap the sediment for beach *** performance of such a structure depends on its geometrical and structural characteristics,the location of the reef(i.e.)the water depth at the toe,distance from the coastline,wave-structure interaction,sediment transport and local morpho *** aforesaid criteria were optimized using a numerical model which predicted the average residual velocity in the site to be in the order of about 1 m/*** to logistical constraints geosynthetic materials had to be *** detailed design of such a system arrived through numerical modelling and field measurements are presented and discussed in this paper.

关键词： Island coastal erosion Submerged reef Tide dominant currents Sediment movement Geosynthetic materials

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