protecting your home from flooding. demountable flood walls
TRANSCRIPT
Protecting your home
from flooding
Demountable Flood walls
An on-line floodplain storage reservoir
Low embankments or ‘argaes
The banks provide low-level protection from the River Severn
flooding land. When the rivers overtop the argaes, water is
stored behind them for a period on a large area of flat land andthen
released via sluicegates when the river levels subside.
Argae by the River Severn
Floodplain woodlands
Contour ploughing
Attenuation cells, (also known as Storm Cells, Soakaway Modules, and Storm Crates) are the modern
equivalent of a soakaway. They allow surface water to be stored in one location and gradually released back to the ground, a bit at a time, at a pace the ground can handle,
rather than in one sudden deluge, as happens during a storm or downpour. In effect, the transfer of water from the surface to the ground is attenuated, is slowed down
and stretched out over a longer period.If you dump 1,000 litres of water onto a patch of ground in one go,
unless you're on sand or gravel, it's unlikely the ground will be able to absorb all that water instantly:
attenuation cells work by taking all the water as fast as it's delivered, returning what it can to the ground as
quickly as possible, but storing the surplus until the ground is ready and able to absorb it.
Weirs
Diversion tunnels and
channels
Small-scale garden size
Larger -scale
Aquaflow permeable
paving