Why Are Some Cities Prone To Floods?
near rivers
near coastal areas
how does this cause flooding?
how does this cause flooding?
Rivers can overflow their banks to cause flooding. This happens when there is more water upstream than usual, and as it flows downstream to the adjacent low-lying areas (also called a floodplain), there is a burst and water gets into the land.
A flood occurs when a river bursts its banks and the water spills onto the floodplain. Flooding tends to be caused by heavy rain: the faster the rainwater reaches the river channel, the more likely it is to flood.
how can we prevent it?
how can we prevent it?
A seawall is a structure separating land and water areas. It is designed to prevent coastal erosion and other damage due to wave action and storm surge, such as flooding. Seawalls are normally very massive structures because they are designed to resist the full force of waves and storm surge.
these are some ways we can help prevent river flooding.
Introduce better flood warning systems.
Modify homes and businesses to help them withstand floods.
Construct buildings above flood levels.
Tackle climate change.
Increase spending on flood defences.
Protect wetlands and introduce plant trees strategically.
Restore rivers to their natural courses.
Introduce water storage areas.
Watch this video on how the US Army Corps of Engineers in America are trying to prevent coastal flooding.
Watch this video on 5 methods of flood protection in Asia