GSI IN MANAGEMENT OF NATURAL HAZARDS
Earthquakes are a
major hazard for life and property in India particularly in the
Himalayas, North Eastern Region, Gujarat and along the Central
Indian Tectonic Zone. Geological Survey of India (GSI) was called
upon to study the earthquakes from its very early years of existence.
It deployed its rapid response team for constraining isoseismal
and earthquake source parameter for major destructive earthquakes
in the country i.e. Uttarakashi, Latur, Jabalpur, Chamoli and
Bhuj. Seismotectonic Atlas of India and its Environ (42 sheets
on 1:1 M scale), published in September, 2000 would help in assessing
expected seismic hazards in a region, enabling suitable design
features to minimise future risk.
15 percent of
India's land area (4.5 lakh sq.km) in the Himalayas, Indo-Burmese
Range and Western Ghat region, are landslide prone. GSI is engaged
in mapping of site specific landslides and suggesting mitigation
measures.
All the major
organised construction programmes in the country since independence
for harnessing rivers for irrigation, power and flood controls
depended on geological advice from GSI. Outstanding examples are
Bhakra Nangal, Hirakud, Nagarjunasagar, DVC, Yamuna Valley, Tungabhadra
and Indravati.
