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I contour maps of the flood prone areas of the state to a scale of 1:15,000 with contour interval
of 0'3 meter should be procured for implembntation of flood plain roning measures. Flood risk
maps should be prepared by carrying out necessary hydrologicat analysL orltnl historical data
and further hydraulic computations to identify areai pione to tlooo foi different frequencies
flood
of
such as 100 years, 50 years and 25 years. Similar risk maps ror n" suorersion caused
due to drainage congestion ai a result of water levet likely to attain, corresponding to a s0 years
and 25 years rainfall will atso have to be prepared. Help bf sattetite imageries
preparation
may be taken for
of such maps.
(para T.4.1l
on receipt of the forecast, its dissemination to the local population in terms of likely
inundation
depth of
and its duration in the area by the administrative authorities is very important
affected population,.cattle,
so that
movable properties etc., are evacuated before tneatla g"ts submerged
by flood water which would cause damage. For this, a network of wireless stations
system
anct telephone
are necessary in the.basin near critical/vulnerable reaches of emOanf