Southwest Environmental Limited

Flood Depth & Flow Data Map Bristol

The below map shows flood flow and depth data used in a Flood Risk Assessment in Bristol.

This data is taken from the Bristol Strategic Flood Risk Assessment Modelling Report.

Flood Risk Depth Map Bristol

This map contains lots of data. For a Flood Risk Assessment we typically use a 1:100 flood depth. This means a flood event that occurs only once every 100 or 200 years, so a really bad flood. In more recent years we are also required to add a climate change adjustment for the flood, typically allowing for 40% greater flow in rivers, and therefore deeper water.

BRISTOLSFRA_2120_0100_T0001_F0100CC70_Stage_T0001_F0100CC70Yrs

Look for the above descriptor when choosing the flood depth. We have guessed what it means but fairly sure, this is 2120 Flood Outline Level for Climate Change Adjusted 1:100 Year Event. And this is the Flood Level we would use for a design flood level.

Please use below map as you see fit, if you would like a Flood Risk Assessment for your project please contact us.