IMD to complete microzonation of Delhi by April

Last Updated: Sunday, February 19, 2012 - 10:04

New Delhi: In an effort that would help mitigate the hazards of an earthquake, seismologists will come out with a micro-analysis of the risks faced by different
parts of Delhi in the eventuality of a major tremor by April.

The zone-wise risk assessment of the impact of a quake on Delhi, among 30 Indian cities in the severe intensity seismic zone, is on in full steam at the India Meteorological Department (IMD).
Microzonation, as it is called, is carried out with the purpose of identifying separate individual areas that are found to have different potentials for hazardous earthquake
effects.

The project, which is expected to be completed by April, would assess soil structure in various parts of the capital to give risk assessments on a zone-wise basis. Once completed, this will help in formulation of area-centric safety guidelines.

"Character of soil structure in Delhi is not uniform and with that varies the impact of an earthquake.

To evaluate this, microzonation process at a map scale of 1:50,000 were done and a fresh process for further detailed microzonation in the 1:10,000 scales is on," R S Dattatrayam, a scientist with IMD`s Seismic Department said.

This seismic microzonation would help seismologists categorise the soil type and structure of a particular region and assess the damage which might be caused to life or
property in case of an earthquake.

Based on this microzonation data, the National Disaster Management Authority (NDMA) will be coming out with specific area-centric safety guidelines.

NDMA Vice-Chairperson Shashidhar Reddy said 240 engineers of Municipal Corporation of Delhi will also be trained to detect vulnerable structures in high-risk areas based on the
new microzonation data.

According to the Seismic Zone Mapping done by the Geological Survey of India (GSI), Delhi is among 30 cities in the country falling in zone IV, which is defined as a severe intensity seismic zone.

PTI



First Published: Sunday, February 19, 2012 - 10:04

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