General definition

General definition of flood as available in text books of hydrology is “an unusually high stage in a river – normally the level at which the river overflows its banks and inundates the adjoining area”.

Some definitions available on web in the context of water flow are quoted below:

·  The rising of a body of water and its overflowing onto normally dry land; "plains fertilized by annual inundations"
·  Cover with liquid, usually water; "The swollen river flooded the village";
·  A large flow
·  The act of flooding; filling to overflowing
·  Flood tide: the occurrence of incoming water (between a low tide and the following high tide);
·  Become filled to overflowing; "Our basement flooded during the heavy rains"

·  The temporary inundation of normally dry land areas resulting from the overflowing of the natural or artificial confines of a river or other body of water.

·  The inundation of a normally dry area caused by high flow, or overflow of water in an established watercourse, such as a river, stream, or drainage ditch; or ponding of water at or near the point where the rain fell. ...

·  High flow, overflow or inundation of a normally dry area which causes or threatens damage.

·  Stream flow greater than the channel can contain

·  An event during which the volume of water in a stream becomes so great that it covers areas outside the stream’s normal channel.

·  An overflowing of water beyond the channel’s capacity.

·  Where a river overspills its banks and spreads out on the valley floor.

·  Any flow that exceeds the bankfull capacity of a stream or channel and flows out of the floodplain; greater than bankfull discharge.