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In spring time, the floods are quite typical in Ostrobothnia, a flat-lying area in Finland.A flood-surrounded house in Ilmajoki, South Ostrobothnia.. Floods can happen on flat or low-lying areas when water is supplied by rainfall or snowmelt more rapidly than it can either infiltrate or run off.
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.
Flash floods may also occur after the collapse of a natural ice or debris dam, or a human structure such as a man-made dam, as occurred before the Johnstown Flood of 1889. Flash floods are distinguished from regular floods by having a timescale of fewer than six hours between rainfall and the onset of flooding.
These floods strike like lightning-swift and merciless, claiming lives silently. Low-lying areas with streams, rivers and storm drains are most at risk of flash flooding, according to the NWS .
Flood flows in urban environments have been investigated relatively recently despite many centuries of flood events. [22] Some researchers mentioned the storage effect in urban areas. Several studies looked into the flow patterns and redistribution in streets during storm events and the implication in terms of flood modelling. [23]
The floods that slammed into two hydroelectric plants and damaged villages in northern India were set off by a break on a Himalayan glacier upstream. A large cluster of glaciers are in the ...
They pointed at maps and diagrams to show areas of the Tulare Lake Basin that had been inundated in past floods that now were dry, and areas that had never flooded but were now underwater ...
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.