Tsunami

2020-11-09 17:29:45

Large waves, long wavelength and period caused due to undersea disturbance
Large, impulsive displacement of sea bed level, landslide triggered tsunamis
Risk : occur rarely in IN ocean
Distribution Pattern : both East West coastlines are vulnerable, earthquake of 6.5 or greater required
Effects depends on seismic event that generated the tsunami, distance from its point of origin, configuration of depth of water in oceans

Tsunami Warning

Predictability through international tsunami warning sys, regional warning sys,
INCOIS gives warning in IN 3 stations in Portblair, Minicoy, Shillong 10 minutes in advance
ITEWC - IN Tsunami Early Warning Sys by UNESCO it consists of national and international seismic station, sea level gauge station, buoys, 400 seismometers, real time processing of data 4.0 and above

Tsunami risk assessment and Vulnerability analysis through dev of models, INHD Naval Hydrographic Department
Preparedness - Real time Seismic Monitoring Network RTSMN be estd under IMD, undersea observation platform being worn away, National Data Buoy program by NIOT, Tsunami escape direction sign boards

ex cyclone shelters, submerged sand barriers, sand dunes with sea weeds, mangroves and coastal forests
Local knowledge centres along coast lines
Construction of location specific sea walls and coral reefs
Dev of break waters as buffer zones, bio shield - narrow strip of land along coastline
ID of vulnerable structures, retrofitting them
Strict enforcement of CRZ, adopt techno legal models to ensure compliance
Emergency tsunami response - equipping first responders, tsunami safe zoning, planning, design, construction practice etc
Ensuring Implementation - aggressive capacity building, use state of the art equipments, conduct regular drills