GEOLOGY

Detailed explanation-1: -Floods are often caused by heavy rainfall, rapid snowmelt or a storm surge from a tropical cyclone or tsunami in coastal areas. Floods can cause widespread devastation, resulting in loss of life and damages to personal property and critical public health infrastructure.

Detailed explanation-2: -Many things can cause a flood. The sudden melting of snow and ice produce river and lake floods. Flash floods are caused by too much rain in the mountains and in cities. Flash floods happen when heavy rain causes a lot of water to gather in a narrow space.

Detailed explanation-3: -The rivers a bring heavy sediment load from catchments. These, coupled with inadequate carrying capacity of rivers are responsible for causing floods, drainage congestion and erosion of river-banks. Cyclones, cyclonic circulations and cloud bursts cause flash floods and lead to huge losses.

Detailed explanation-4: -Heavy rainfall. Deforestation. Improper drainage system.

Detailed explanation-5: -erosion of the river channel. buildup of sediment in the river channel. widening of the channel. destruction of natural levees.