Floods occur when the volume of water contained by the shores of a body of water or the banks of a waterway exceeds the body's capacity. The water moves above and outward from the typical area it occupies. The major causes of floods are heavy rains, melting snow or a blockage of water flow in a river.Continue Reading
Many factors come together to cause a flood. In every case, a flood is caused by an excess of liquid water beyond the environment's normal ability to carry it. The two places that water drains on land are into bodies of water and into the ground itself. This latter capacity of the ground to absorb water is very important, especially during rains. Typically, land that receives a large amount of rain also has a large ability to absorb it, preventing flooding up to its capacity. Once rain exceeds this capacity, however, it cause rivers and lakes to swell, and if they swell beyond their natural or artificial barriers, they spill out onto the land.
The capacity of land to absorb water is limited. Some places, particularly near mountains, receive water too quickly to be absorbed by the land. Such floods occur because of melting snow or storms in nearby mountains.Learn more about Storms
According to NOAA, most floods start with slow-moving thunderstorms, thunderstorms that travel the same path several days in a row, or hurricanes. Floating debris and ice sometimes form a temporary dam which causes the water to back up until the debris breaks free, releasing a wall of water and causing flooding downstream.Full Answer >
Any body of salt water or brackish water that is a shallow separation from the rest of the sea is considered a lagoon, and they form when sand banks or reefs build up along shallow waters near the coast or when coral reefs grow on central islands that are sinking. Estuaries, or fresh water streams, feed the lagoons as they grow.Full Answer >
Every time a person takes a bath, Archimedes' principle is observed as the tub is filled to a certain level and, once the bather enters the water, it rises based on the volume of water weight that the person's body displaces. Adding chicken to a pot of boiling water yields the same results but on a smaller scale.Full Answer >
Floods can occur in any area of the world that experiences rainfall, but areas with many bodies of water are at a higher risk. Flooding can also occur when excessive rainfall hits land that is dry. The flood occurs because the land cannot take in all of the water.Full Answer >