Question

what are the elements at first of flood

Answer 1

Hii dear here is your answer.

Overbank flooding occurs when water rises overflows over the edges of a river or stream. ...Flash flooding is characterized by an intense, high velocity torrent of water that occurs in an existing river channel with little to no notice.

Answer 2

Floodplains is the area of alluvial deposits found beside the river due to flooding and meandering .The flood brings a fine sands and silts along with it, gets deposited around the rivers in plain.Similary meanders erode away the valley slowly and create a wide valley floor, depositing alluvial, fine silt along the slopes.Over time this builds up into a large flood plain.  

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