Different Types of Floods

In the Earth, the Flood is the most dangerous destructive natural Hazards.It occurs mostly all over the world, when the water gets overflows.

TYPES OF FLOODS:

RIVERINE FLOODING:

RIVERINE-FLOODING

  • The Riverine Flood occurs when there is extreme rainfall over an extended period of time.
  • The heavy snow melting and ice jamming may be possible for Riverine Flood.
  • By this Riverine Flooding, the areas may affect with causing dams and dikes.
  • The Major two types of Riverine Flooding are, Overbank Flooding and Flash Flooding.

FLASH FLOODING:

FLASH-FLOODING

  • The Flash Flood occurreddue to extreme heavy rainfall from thunderstorms.
  • These occur with a great volume of water with short duration of time.
  • When Compared to rainfall, the Flash flood generally occurs six hours to develop.

STORM SURGE:

STORM-SURGE

  • The Storm Surge occurs at the time of intense low pressure system over the oceans.
  • Because of the low pressure, the level of sea rises, and less air pressing below the sea.
  • The Strom surge is nothing but, the water is pushed to shore by a hurricane.
  • The flood occurs when the sea levels comes above the tidal limit and its depends upon the size and intensity of storm in an abnormal way

 

DAM FAILURE :

DAM-FAILURE

  • The failure in Dams occurs due to manmade disasters like earthquakes, heavy rains, design defects etc
  • It acts as an artificial barrier which can store liquid borne materials, impound waters in order for storage purpose and controlling of it
  • The main causes for the failure are overflowing of river streams due to its increased volume of water and the capacity beyond the storage along deliberate acts
  • It creates an warming of being damaged totally

COASTAL (SURGE FLOOD):

COASTAL-(SURGE-FLOOD)

  • The Coastal Flood which occurs mostly in the areas Coast of sea, Ocean and opened water area.
  • Because of the extreme severe weather conditions, the Coastal flood occurs.
  • The four main combination factors are Waves, Astronomical tides, Storm and relative mean sea level.
  • It can also be caused by storm surge, sea level rise and tsunami

FLUVIAL (RIVER FLOOD):

FLUVIAL-(RIVER-FLOOD)

  • The Fluvial flood occurs, when the surface area washes into a river, and then the water overflows in the surrounding area.
  • The major factors of fluvial flood are Rainfall Conditions, Ground Conditions.

PLUVIAL (SURFACE FLOOD):

PLUVIAL-(SURFACE-FLOOD)

  • The rainfall or snowmelt is not absorbed into the ground level, the Pluvial Flood occurs.
  • The Factors of Pluvial flooding are severity of rainfall, soil conditions like soil type,moistures,variations in vegetation’s, urbanization and sewer infrastructure such as overload of conveyance capacity
  • Pluvial flooding relates to extreme downpour of rain saturation which results in over flow
  • Pluvial floodingoccurs when an extremely heavy downpour of rain saturates drainage systems and the excess water cannot be absorbed

URBAN FLOODS:

 

  • The Urban Flood is nothinURBAN-FLOODSg, the flood occurs in the Urban areas.
  • It may be caused flash flood or coastal flood or river flood which affects in urban area.
  • This flooding occurs due to flow of water into urban region which is faster than it can be absorbed into soil or reservoir caused by flash or coastal flooding
Categories Nature

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