jendel

Floods generally occur as a result of bad weather ( for example : storms, cyclones, tornadoes or thunderstorms, heavy or persistent rain), melting snow or ice, or the sudden discharge of water. These events lead to a rise in the water level of major riverbeds or to an accumulation of flow water, to the resurgence of underground rivers or to thaws in low-lying areas adjoining stream banks or river estuaries. In mountainous areas, landslides, earthquakes, and avalanches can cause the overflowing or rupture of hydraulic dams or cause unstable blockages at certain points on rivers, and thus threaten or destroy people and the infrastructure located in the lower parts of valleys. Bursting or overflowing of hydraulic dams, as well as seismic/tidal waves are special cases which require specific protective measures. Damage caused by floods can vary greatly according to the nature of the phenomenon at the origin of the flood. They can affect whole regions or certain limited sectors. Moreover, ...