Cause of the flood

A disaster is a serious distruption of the functioning of a community or society involving widespread human, material economic or environmental losses and impact, which exceeds the ability of the effected community or society to cope using its own resources. flood is one of disaster cause disvantages to people and the world. its a natural even or occurrence where  a piece of land that is usually dry land suddenly gets submerged  under water. some flood can occur suddenly and recede quickly. there can be floods. Sometimes, there is heavy rain for a very short period that result in floods. In other times, there may be light rain for many days and weeks and can also result in flood. and this some reason can of the flood is high rainfall, Global warming, Coastal Flooding, and deforestation.

High rainfall Heavy rainfall raises the water level. When the water level is higher than the river bank or the dams, the water comes out from the river, there will be flooding. High Rainfall Zone is a new and expanding environment for cropping, but studies indicate that crops in this zone are performing well below potential based on available sunlight, water and temperature. High Rainfall Zone is a new and expanding environment for cropping, but studies indicate that crops in this zone are performing well below potential based on available sunlight, water and temperature.
          Global warming Because of global warming, the temperature of this year is higher than the temperature of many years ago. The ice caps melt in spring, and the water goes into the sea. The water raises the sea level, and makes the river level rise. When river level rises, flooding may occur.

           Coastal Flooding always occurs in coastal areas. High tides or storms cause the water level to rise. If the water level is higher than the level of the coastal lowland, flooding will occur. Large areas of forests near the rivers have been cleared. The lands are used to make room for settlement, roads and farmland. Less vegetation protects the soil, the soil is quickly lost to rivers and the sea. This raises the river bed, so the river overflows its banks easily.

deforestation is the removal of a forest or stand of trees where the land is there after converted to a non-forest use. Examples of deforestation include conversion of forestland to farms, ranches, or urban use. Deforestation occurs for many reasons trees are cut down to be used or sold as fuel (sometimes in the form of charcoal) or timber, while cleared land is used as pasture for livestock, plantations of commodities and settlements. The removal of trees without sufficient reforestation has resulted in damage to habitat,flooding, biodiversity loss and aridity. It has adverse impacts on biosequestration of atmospheric carbon dioxide. Deforestation has also been used in war to deprive the enemy of cover for its forces and also vital resources.

However, floods are not always caused by heavy rainfall. They can result from other phenomena, particularly in coastal areas where inundation can be caused by a storm surge associated with a tropical cyclone, a tsunami or a high tide coinciding with higher than normal river levels.

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