Upstream floods are similar to flash floods. Large amounts of rain in a short period of time. Downstream floods are produced by storms of long duration that saturate the soil and produce increased runoff.
During the Tewkesbury flooding in 2007, a total of seven people lost their lives due to the extreme weather conditions and flooding.
Pluvial flooding happens when rainfall exceeds the ground's ability to absorb it, leading to surface water accumulation. Fluvial flooding, on the other hand, occurs when rivers or streams overflow their banks due to excessive rainfall or snowmelt.
Entrainment flooding is a type of flooding that occurs when water is rapidly entrained or mixed with sediment and debris, creating a fast-moving and turbulent flow that can be highly destructive. This type of flooding can dislodge large boulders, trees, and other debris, causing extensive damage to structures and infrastructure in its path. Entrainment flooding is particularly dangerous because of the unpredictability and force of the flow.
Air pollution can actually lead to flooding quite easily. Raindrops form in air particulates. The more particulates in the atmosphere, the more likely it is to rain heavily and perhaps cause flooding.
When flooding occurs during a rainstorm, the soil condition is typically saturated with water. This saturation prevents the soil from absorbing additional water, leading to surface runoff and flooding.
Seasonal rainfall upstream flowing into the Nile.
Backwater flooding happens when there is an obstruction downstream that causes the water further upstream to rise over the banks and into the landscape. An ice jam or channel restriction can cause backwater flooding.
To stop the flood tide from coming upstream and flooding London
Rapid snow melt in regions upstream
The flooding brings silt from upstream to the bottom land, enriching the soil.
flooding upstream as reservoir fillsstopping salmon migration to spawning streamssilting of the dam reservoirloss of river beaches downstreamheating of downstream river wateretc.
Ancient Egyptians needed the floods to irrigate crops. Egyptians would measure the water with a nilometer so people upstream would be aware of how much water was coming.
Orignally, they were imported to the U.S. to clean algae out of private ponds. But, because of flooding in the late 1970s to early 1980s, they got out and into the mississippi river. They have been migrating upstream eversince then.
upstream
Upstream - newspaper - was created in 1996.
downstream and upstream
The duration of Swimming Upstream is 3240.0 seconds.