There are a lot of definition and scope of view when we were talking about flood. Normally, flood occurs when prolonged rainfall over several days and intense rainfall over a short period of time that causes a river or stream to overflow and flood the surrounding area. Beside that, flood can be defined as a great amount of water over a place that usually dry or a situation of an overflow of water from it actual barrier. Flood also can be described as an area which actually at normal condition is a dry place that is later filled with water during certain season or occasion due to overflow of water from other area or from heavy rains. Floods also can be defined as a hydrological events characterized by high discharges and/or water levels leading to inundation of land adjacent to streams, rivers, lakes, and other water bodies. The US National Flood Insurance Program also defined a flood as a general and temporary condition of partial or complete inundation of two or more acres of normally dry land area or of two or more properties from an overflow of inland or tidal water, unusual and rapid accumulation or runoff of surface waters from any source or from a mudflow.
Floods are common and costly natural disasters
When rivers overflow their banks they cause damage to property and crops. Floods are common and costly natural disasters.
Floods usually are local, short-lived events that can happen suddenly, sometimes with little or no warning. They usually are caused by intense storms that produce more runoff that an area can store or a stream can carry within its normal channel. Rivers can also flood when dams fails, when ice jams or landslides temporarily block a channel, or when snow melts rapidly. In a broader sense, normally dry lands can be flooded by high lake levels, by high tides, or by waves driven ashore by strong winds. Small streams are subject to floods (very rapid increases in runoff), which may last from a few minutes to a few hours. On larger streams, floods usually last from several hours to a few days. A series of storms might keep a river above flood stage (the water level at which a river overflows its banks) for several weeks.
When rivers overflow their banks they cause damage to property and crops. Floods are common and costly natural disasters.
Floods usually are local, short-lived events that can happen suddenly, sometimes with little or no warning. They usually are caused by intense storms that produce more runoff that an area can store or a stream can carry within its normal channel. Rivers can also flood when dams fails, when ice jams or landslides temporarily block a channel, or when snow melts rapidly. In a broader sense, normally dry lands can be flooded by high lake levels, by high tides, or by waves driven ashore by strong winds. Small streams are subject to floods (very rapid increases in runoff), which may last from a few minutes to a few hours. On larger streams, floods usually last from several hours to a few days. A series of storms might keep a river above flood stage (the water level at which a river overflows its banks) for several weeks.
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