Feb. 29, 2020

The Indian National Centre for Ocean Information Services (Incois), Hyderabad, has launched three ocean-based specialised products/services — the Small Vessel Advisory and Forecast Services System (SVAS), the Swell Surge Forecast System (SSFS) and the Algal Bloom Information Service (ABIS).

Swell Surge Forecast System:

  • It is designed for the prediction of Kallakkadal/Swell Surge that occurs along the Indian coast, particularly the west coast.

  • Kallakkadal is a colloquial term used by Kerala fishermen to refer to the freaky flooding episodes and in 2012 UNESCO formally accepted this term for scientific use.

  • Kallakkadal are caused by meteorological conditions in the Southern Ocean, south of 30°S.

  • Kallakadal/Swell surge are flash-flood events that take place without any noticeable advance change in local winds or any other apparent signature in the coastal environment. Such events are intermittent throughout the year.

Small Vessel Advisory and Forecast Services System (SVAS):

  • It is an advisory and forecast service system for small vessels operating in Indian coastal waters. The advisories are valid for small vessels of beam width up to 7 m.

  • The warning system is based on the ‘Boat Safety Index’ (BSI) derived from wave model forecast outputs such as significant wave height, wave steepness, directional spread and the rapid development of wind at sea which is boat-specific.   

Algal Bloom Information Service (ABIS):

  • INCOIS-ABIS will provide near-real time information on spatio-temporal occurrence and spread of phytoplankton blooms over the North Indian Ocean.

  • In addition, four regions have been identified as bloom hotspots viz. a) North Eastern Arabian Sea b) coastal waters off Kerala c) Gulf of Mannar and d) coastal waters of Gopalpur. 

Source : The Hindu