Options we are considering

Over the last year, we have been reviewing a long list of potential measures to reduce flood risk in the area. This long list has been narrowed down to a short list of 2 options: Option Purple and Option Orange.

Option Purple – Flood walls and embankments

Flood walls and embankments are designed to reduce the flood risk by cutting off overland floodplain flow routes. This option uses a combination of both. It includes building new structures and improving existing ones, like the Sumptermead embankment in Datchet. Our next steps will be to look at exact locations where these could be effective in reducing flood risk while not increasing flood risk elsewhere.

Flood walls can

  • blend into an urban landscape by looking like any other wall

  • complement the local area by cladding them with similar styles of brick or stone

Flood walls are typically wider with deeper foundations to make sure they are strong enough to withstand flood water and limit groundwater seepage.

Flood embankments can

  • merge into garden and park landscapes by using shallow side slopes and appropriate planting

  • provide valuable habitat, with planting of wildflowers

Map showing route of proposed option purple past Datchet, Ham Island, and WraysburyPictoral diagram showing an embankment and a flood wall protecting properties by holding back flood water. The water is at a higher level than the previous flood defence.


Option Orange – Flood relief channel

This option is a flood relief channel, with a constant flow of water like a regular river. It would help manage floodwater by keeping it in the channel, preventing it from spreading overland through communities. The same amount of floodwater from the River Thames upstream would be carried through the channel to re-join the river downstream.

Map showing the route of the proposed flood channel to be investigated as part of option orange. This runs north-east of the main River Thames.

Pictoral graphic showing a bypass channel diverting flood water across the flood plain and away from properties that currently flood


What else are we considering?

It is important that we do not transfer flood risk from one community to another when carrying out any projects. We will carefully assess the impacts of each option. If needed, we will explore the following:

  • Improve the effectiveness of main drainage channels in floodplain areas.
  • Natural flood management opportunities across the wider catchment
  • Improve flood conveyance at structures within the channel.
  • Remove or lower barriers in the river floodplain such as high ground, fences and roads that block water from draining properly.


Resilience

We will explore flood resilience alongside Option Purple or Option Orange in areas that would not benefit from the options themselves. There are many different types of flood resilience including:

  • Assessing if existing infrastructure can be improved.
  • Promoting property-specific flood resilience.
  • Reviewing emergency plans for flooding events, which includes identifying key transport routes and exploring how to speed up the return to normality.
  • Awareness raising and education.
  • Investigating the possibility of groundwater flood warnings.
  • Speaking with local residents to see how we can learn from past experiences.
  • Exploring further spatial planning opportunities with the Council.


To find out more about the project:

Over the last year, we have been reviewing a long list of potential measures to reduce flood risk in the area. This long list has been narrowed down to a short list of 2 options: Option Purple and Option Orange.

Option Purple – Flood walls and embankments

Flood walls and embankments are designed to reduce the flood risk by cutting off overland floodplain flow routes. This option uses a combination of both. It includes building new structures and improving existing ones, like the Sumptermead embankment in Datchet. Our next steps will be to look at exact locations where these could be effective in reducing flood risk while not increasing flood risk elsewhere.

Flood walls can

  • blend into an urban landscape by looking like any other wall

  • complement the local area by cladding them with similar styles of brick or stone

Flood walls are typically wider with deeper foundations to make sure they are strong enough to withstand flood water and limit groundwater seepage.

Flood embankments can

  • merge into garden and park landscapes by using shallow side slopes and appropriate planting

  • provide valuable habitat, with planting of wildflowers

Map showing route of proposed option purple past Datchet, Ham Island, and WraysburyPictoral diagram showing an embankment and a flood wall protecting properties by holding back flood water. The water is at a higher level than the previous flood defence.


Option Orange – Flood relief channel

This option is a flood relief channel, with a constant flow of water like a regular river. It would help manage floodwater by keeping it in the channel, preventing it from spreading overland through communities. The same amount of floodwater from the River Thames upstream would be carried through the channel to re-join the river downstream.

Map showing the route of the proposed flood channel to be investigated as part of option orange. This runs north-east of the main River Thames.

Pictoral graphic showing a bypass channel diverting flood water across the flood plain and away from properties that currently flood


What else are we considering?

It is important that we do not transfer flood risk from one community to another when carrying out any projects. We will carefully assess the impacts of each option. If needed, we will explore the following:

  • Improve the effectiveness of main drainage channels in floodplain areas.
  • Natural flood management opportunities across the wider catchment
  • Improve flood conveyance at structures within the channel.
  • Remove or lower barriers in the river floodplain such as high ground, fences and roads that block water from draining properly.


Resilience

We will explore flood resilience alongside Option Purple or Option Orange in areas that would not benefit from the options themselves. There are many different types of flood resilience including:

  • Assessing if existing infrastructure can be improved.
  • Promoting property-specific flood resilience.
  • Reviewing emergency plans for flooding events, which includes identifying key transport routes and exploring how to speed up the return to normality.
  • Awareness raising and education.
  • Investigating the possibility of groundwater flood warnings.
  • Speaking with local residents to see how we can learn from past experiences.
  • Exploring further spatial planning opportunities with the Council.


To find out more about the project:

Page last updated: 10 Oct 2024, 11:58 AM