GEOLOGY

Detailed explanation-1: -Floods are the most frequent type of natural disaster and occur when an overflow of water submerges land that is usually dry. Floods are often caused by heavy rainfall, rapid snowmelt or a storm surge from a tropical cyclone or tsunami in coastal areas.

Detailed explanation-2: -The most common is when rivers or streams overflow their banks. These floods are called riverine floods.

Detailed explanation-3: -A fluvial, or river flood, occurs when the water level in a river, lake or stream rises and overflows onto the surrounding banks, shores and neighboring land. The water level rise could be due to excessive rain or snowmelt.

Detailed explanation-4: -Flood caused due to overflow of river which is due to excessive rainfall over an extended period of time, causes a river to exceed its capacity is called riverine flood.

Detailed explanation-5: -Massive Rainfall. Drainage systems and the effective infrastructure design aid during heavy rains. Overflowing of the Rivers. Collapsed Dams. Snowmelt. Deforestation. Climate change. Emission of Greenhouse Gases. Other Factors.