Flood can occur when the river water level rises due to heavy floods that flood and destroy buildings and houses along the river. Flood damage can be reduced by moving people away from the river, but economic activities and livelihoods are often associated with the river. As a result, people are still settling down in areas at high risk of flood damage, where the value obtained from living close to the river basin is higher than the cost of periodic flood forecasting. humans are harmful. Flooding can damage, damage or completely collapse traffic structures such as bridges, culverts, railways, drainage systems, houses, ... not only that, people and animals drown or drown. Floods affect domestic water in particular and water sources in general: water is polluted by water carrying wastes from sewers, sewers, and ponds overflowing the streets, homes, public faucets, etc. Causes scarcity of drinking water and many other conditions. Due to poor sanitation, infectious diseases rely on water to disperse. Under such conditions, epidemics easily arise and spread, because most diseases are transmitted by water faster than through the air, such as cholera, etc., making it difficult for the economy: reducing "instantaneous" tourism activities, costs for reconstruction, while accelerating the increase in food prices, ... To cope with floods, we must regularly monitor the situation. weather images, prepare tools to cope with storms when needed, build dikes, ... Floods cause many dangers to people.
