Trees

Boundary Treatment

Drainage and SUDs

Biodiversity

Gardens, small spaces and public realm

Residential parking layouts

Industrial and commercial sheds

Maintenance and responsibilities

Landscape and Nature

Drainage and SUDs

Introduction

A large proportion of Trafford is within a nationally recognised Critical Drainage Area. This means that significant areas are at a direct risk of flooding, whilst other areas have a vital role to play in preventing excess water run-off impacting those more critical areas. Each and every site has its role to play in addressing flood risk.

 

In an increasingly unpredictable and changing climate, it is imperative that sustainable urban drainage solutions are achieved, wherever possible.

 

The ultimate positive solution is where the landscape and nature combine to deliver sustainable drainage. Sustainable urban drainage systems (SuDS) have the ability to:

 

  • Hold back water run-off
  • Prevent flooding
  • Remove or reduce contaminants / pollutants from water on site
  • Form an inherent part of an inspiring landscape or urban setting
  • Provide habitat as part of the system

For further information on SuDS, please refer to Transport for Greater Manchester: Streets for All SuDS guidance.

LNDS 1

Drainage and SUDs

Landscape and Nature

Best Practice for drainage and SUDs

Combining planting with 'natural' drainage solutions

There can be an incredibly successful symbiosis between landscape, nature and sustainable drainage systems. Hence, it will be expected that landscape, nature and SuDs are the first design tools in achieving a successful drainage scheme.

These ‘natural’ drainage solutions can provide all of the identified SuDs benefits. Additional benefits that these can bring to wildlife as well as human-related benefits are also well documented. ‘Natural’ drainage solutions must be considered and incorporated wherever possible within sites.

 

These may include:

  • Wetlands
  • Planted attenuation basins and ponds
  • Planted infiltration ponds
  • Planted strips, trenches and swales
  • Bioretention areas
  • Rain gardens

Examples of SUDs on streets

Other Sustainable Drainage Systems

There is a well-documented hierarchy of sustainable drainage solutions.


Wherever possible, ‘natural’ drainage solutions should be introduced into a site’s landscape design and network of connected spaces. Where this is not possible, a justification should be put forward, and other sustainable drainage solutions proposed.

 

These can include:

  • Rainwater harvesting
  • Green roofs (on buildings or structures)
  • Permeable surfaces
  • Channels or rills
  • Engineered soakaways, trenches or basins
  • Geo-cellular storage systems
  • Inlet, outlet and control systems

Examples of SUDs on residential sites

Drainage and SUDs case studies

Derwenthorpe

Derwenthorpe by Studio Partington for Joseph Rowntree Foundation Derwenthorpe was one of the first large-scale low carbon communities in northern England. Its ‘green’ heating and

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Airfields, Deeside

The Airfields, Deeside Sitting at a low level, with marginal falls, and alongside the river Dee, this former Airfield site was developed through a landscape-led

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Mayfield Park

Mayfield Park by Gillespies and Studio Egret West for Mayfield Partnership Mayfield Park brings nature and green open spaces right into the heart of the

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Permeable paving options