Coastal areas play a vital role in the socio-economic development of a country because seaborne trade remains the cheapest method for importing and exporting large quantities of merchandise all around the world. Kasargod Fishing Harbour (12° 28′ 32.71” N and 74° 59′ 36.14” E) in Kerala state is situated at the confluence of the Northern creek and the downstream of the river Chandragiri. With the help of mathematical model studies from the considerations of wave tranquillity and littoral drift, a 700-m long curved breakwater as extension of northern breakwater was evolved to provide protection and tranquil conditions at the inlet, which would help in manoeuvring of the trawlers/boats of the fisherman through the entrance of inlet channel. A depth-averaged numerical model using MIKE 21 FM software has been developed to study tidal circulation in the creek inlet and nearshore region and to assess the changes likely to occur in hydrodynamics and siltation pattern in navigational channel and harbour region due to the proposed expansion. The model studies indicated that the maximum current magnitude of the order of 0.5 m/s and 0.75 m/s occurred in the inlet channel during non-monsoon and monsoon season, respectively. During high flow in the monsoon season, only ebb currents would persist in the inlet channel and during ebbs, irrespective of seasons a circulation always persists on the south side of the southern breakwater. Also, it is indicated that as compared to other nearby regions, sediment deposition in the inlet channel is quite less. However, a maintenance dredging of in the inlet channel would be required periodically for smooth functioning of the channel and manoeuvring of fishery boats.
Extension of Breakwaters and Restoration of River Mouth Atkasargod Fishery Harbour, Kerala
Lecture Notes in Civil Engineering
International Conference on Hydraulics, Water Resources and Coastal Engineering ; 2021 December 23, 2021 - December 25, 2021
2023-06-06
11 pages
Article/Chapter (Book)
Electronic Resource
English
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