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Planning policy
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Strategic flood risk assessment
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DEFRA (Department of Environment, Food and Rural Affairs) website

Surface water management plan and aqua green project

Whether you are a resident or developer looking to invest in our city, our surface water management plan (available to download below) can help you to understand the risks of surface water flooding and take necessary actions to reduce its impacts.

Developers can also use the plan in line with our strategic flood risk assessment, to gain information for flood risk assessments and investigations.

Find out more about the strategic flood risk assessment (SFRA)

About the plan

Since the 2007 floods, when 100mm of rain fell on Hull in 24 hours, we have developed a surface water management plan (SWMP).  The plan helped us to -

  • look at the reasons that surface water flooding occurs. This includes water escaping from sewers, drains, small streams and ditches during heavy rainfall
  • assess how likely it is for surface water flooding to happen again
  • identify and assess changes we can make to manage flood risk
  • select actions and plan delivery to reduce the impacts of flooding.

Derringham and Orchard Park surface water flooding

The results of the plan found that the two areas at highest risk of surface water flooding are Derringham and Orchard Park.

The main cause of surface water flooding in Derringham and Orchard Park is rural runoff from the west of the city. This is when water escapes from flooded fields and grasslands.

One of the actions considered to reduce the potential for damage in this area is the use of Aqua Greens. These are open spaces which incept and store water before it reaches the urban area.

What happens next

We will investigate the potential benefits of Aqua Greens alongside the schemes being carried out by our partner organisations - East Riding of Yorkshire, Yorkshire Water and the Environment Agency.

The surface water management plan and appendices

You can download the surface water management plan and appendices below.

The full document can also be purchased for £60 (cheques made payable to Hull City Council) from the address below. You can view the hard copy of the surface water management plan by visiting Kingston House.


Our surface water management plan and project objectives have been developed in line with the surface water management plan technical guidance supplied by the Department of Environment, Food and Rural Affairs (DEFRA).

Background to surface water flooding in Hull. Work was carried out to understand the drainage network in Hull and the consequences of the 2007 floods.

The surface management plan modelling has updated the strategic flood risk assessment outputs and investigated the storage capacity of the existing drainage system.  This work has then been used to identify the areas of greater risk of surface water flooding.

The following maps show the modelled flood extents for various storm events used to identify the surface water flood risk areas.

Further detailed modelling has been used to investigate flood risk at Derringham and Orchard Park. To be read in conjunction with chapters 4 and 5 of the main report.

Maps showing the modelled flood extents for the various return periods in Derringham and Orchard Park.

The following draft supplementary planning document informs prospective developers and applicants of the requirements for the management of surface water in the new developments across Hull.

The following document details the capital development costs for water storage areas which will provide a reduction in flood risk in Derringham and Orchard Park.

The project was carried out in partnership with The Environment Agency, Yorkshire Water Services Ltd, East Riding of Yorkshire Council and the University of Hull and supported by DEFRA (Department for Environment, Food and Rural Affairs). All partners are working together to manage the drainage of Hull and the city’s future development.  It supports the requirements of the Pitt Review into the implications and issues surrounding the 2007 floods and national planning policy requirements.

Find out more about surface water management plans on the DEFRA website (link opens in a new window)

Contact us

Planning policy
Hull City Council
The Guildhall
Alfred Gelder Street

Tel: 01482 300 300
Text phone: 01482 300 349

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