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Flooding can be caused by a mix of both natural processes, such as extreme weather upstream, and human changes to waterbodies and runoff. Flood management methods can be either of the structural type (i.e. flood control) and of the non-structural type. Structural methods hold back floodwaters physically, while non-structural methods do not.
[58] [19] This helps to reduce the amount of mitigation needed to protect humans and buildings from flooding events. Similarly, flood warning systems are important for reducing risks. [58] Following the occurrence of flooding events, other measures such as rebuilding plans and insurance can be integrated into flood risk management plans. [58]
Flooding is a natural process, which maintains ecosystem composition and processes, but it can also be altered by land use changes such as river engineering. Floods can be both beneficial to societies or cause damage. Agriculture along the Nile floodplain took advantage of the seasonal flooding that deposited nutrients beneficial for crops ...
Flood stage is the water level, as read by a stream gauge or tide gauge, for a body of water at a particular location, measured from the level at which a body of water threatens lives, property, commerce, or travel. [1] The term "at flood stage" is commonly used to describe the point at which this occurs.
From the ecological perspective, the most distinctive aspect of floodplains is the flood pulse associated with annual floods, and so the floodplain ecosystem is defined as the part of the river valley that is regularly flooded and dried. [19] Floods bring in detrital material rich in nutrients and release nutrients from dry soil as it is flooded.
Drinking water treatment plants are also at risk. Most U.S. cities and towns get drinking water from rivers and lakes, and water treatment plants tend to be near the water bodies from which they draw.
Flash floods are most common in densely populated urban environments, where less plants and bodies of water are presented to absorb and contain the extra water. Flash flooding can be hazardous to small infrastructure, such as bridges, and weakly constructed buildings.
After pummelling other Mediterranean countries, the powerful Storm Daniel swept into Libya at the weekend, unleashing record amounts of rain as it made landfall. The rain dumped by the storm ...