A number of models have been proposed for unsteady flood flows through urban landscapes, but the data needs and complexity are varied and it is not clear that the benefits of added complexity are justified by improved predictive skill.
During the floods, flow through the Wallula Gap was slow enough such that water pooled in a temporary lake, Lake Lewis.
During the floods, flow through the narrow Wallula Gap was restricted such that water pooled in a temporary lake, Lake Lewis, which formed in the lowlands of the Columbia Plateau.
This area is particularly prone to major floods as the Rijn River flows through Germany into the Netherlands before it meets the North Sea.
In York, where the EA's decision to open the Foss barrier led to flood water flowing through the city's streets, soldiers were drafted in to help with repairs.
Flood waters flowing through Paris have swelled the river Seine to 6 metres above its normal level, with a peak level of up to 6.5 metres expected later on Friday, as the Louvre museum closed its doors to the public to allow priceless artworks to be moved up from its basement.
In Saudi Arabia, the government has constructed dams throughout the country so as to utilise the surface runoff water to tap seasonal flood water flowing through the wadis.
Slovakia's Prime Minister Robert Fico also warned that there was a risk of flooding as water moved down the Danube, which flows through Bratislava.
To contain the radionuclides that fell on the zone's waterways, workers constructed a series of dikes designed to prevent flooding into the Pripyat River, then into the Dnieper River, which flows through Kiev to the Black Sea.
The river flows through a central arch, and there are flood relief arches on each side of the channel.
