Disaster management and mitigation

Disaster management and mitigation

FLOOD

FLOODAn overflow of a large amount of water beyond its normal limits, especially over what is normally dry land.

Principle causes and Types

Areal Riverine Estuarine and coastal Urban flooding Catastrophic

ArealHappens mostly in plain areas when water because of rainfall or snowmelt is more rapidly than its can absorb or run off.

RiverineDue to slow or rapid rise of river water levels due to prolong or heavy rainfall.

Caused by tidal surges due to winds and also by tropical cyclone or an extra-tropical cyclone

Estuarine and Coastal

Urban FloodingOccurs in densely populated areas where water due to rain exceeds the capacity of drainage systems.

CatastrophicCatastrophic flooding is usually associated with major infrastructure failures such as the collapse of a dam, which are sometimes caused by either earthquakes and volcanic eruption

Effects: PrimaryDamage to buildings and other structures, including bridges, sewerage systems, roadways, and canals

Effects: Primary

Mobility Issues in terms of people and goods

Effects: Secondary long term effect:

Lack of food and clean drinking waters

Effects: Secondary long term effect:

Rapid spreading of water borne diseases and illness

Effects: Secondary long term effect:

Loss of crop and cattle

Effects: Secondary long term effect:

Waste and garbage disposal issues

Number of FLOOD events from 1950 to 2000

Source: Millennium ecosystem assessment

Effects

Response

Response

EffectsAfter health

effects of floods

Relief, Control and MitigationFLOOD

Relief, Control and MitigationRelief, Control and MitigationFLOOD

Relief, Control and MitigationFLOOD

Equipment existing and concepts

Flood

Equipment existing and concepts

Flood

Equipment existing and concepts

Flood