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Protecting your home from flooding. Demountable Flood walls.

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Presentation on theme: "Protecting your home from flooding. Demountable Flood walls."— Presentation transcript:

1 Protecting your home from flooding

2 Demountable Flood walls

3 An on-line floodplain storage reservoir

4

5 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.

6 Argae by the River Severn

7 Floodplain woodlands

8 Contour ploughing

9 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.

10 Weirs

11 Diversion tunnels and channels

12 Small-scale garden size Larger - scale

13 Aquaflow permeable paving


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