what happens when a river overflows it's banks
Answers
A flood occurs when a river or stream overflows its banks. Seasonal floods are the norm in many rivers, for example when spring rains or snowmelt increase the flow. During a flood, the channel is completely filled and water moves onto the floodplain and slows down. As it slows, it can carry less material. A lot of sand, silt, leaves, and other materials that were carried while the water was swirling along in the channel are dropped on the floodplain.
There are about 79 Great Rivers on our planet, and the flood pattern (or hydrograph) of each is unique, much like a signature. This signature reflects the region and climate. Some great rivers have two peaks each year, others have one. Before it was dammed, the Missouri River had a March “rise” caused by snowmelt in the Great Plains and by breakup of ice in the river and its tributaries. A second “rise,” in June, was caused by snow melting off the distant Rocky Mountains and traveling down the river to join runoff from rainfall in the Plains. Dams on the Missouri now store the spring floods and release water during the summer, so the flows downstream do not change as much as they once did.
Answer:
floods
soil erosion ....etc take place as the water level rises and dams may also overflow
it may cause harm to the surrounding area and residents
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