Answers

2015-03-20T18:19:46+05:30
A natural disaster is unforeseen ,severe and immediate .pollution,ozone depletion in he stratosphere and global warming come in this category . Natural disasters include cyclones, earthquakes, flood ,drought {though these two are now being increasingly considered 'man- made disasters] heat and cold waves ,landslides,avalanches,flash floods, severe thunderstorms,hail ,low level wind shears and micro burst.
       the destructive potential of any natural hazard is estimated basically by its spatial extent and severity.the phenomenon extending from a few kilometers t a few ten of kilometers
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2015-03-20T19:25:05+05:30
flood is an overflow of water,whichfills the whole land with water.
flood may occur from the waterbodies like rivers and lakes,in which water overtops or usually escape its boundary.
CAUSES OF FLOODS:
1) the combination of sea tidal surges with low baromatic pressure may cause floods.
2) floods may also cause due to the distruction of dam,the damage of dam may cause due to other clamaties like earthquakes etc.


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