SUDs Explored

On Tuesday 5th July, 22 Landscape Architects and invited guests from across the county visited the West of Waterlooville development to see best practice in Sustainable Urban Drainage systems (SUDs).

The 247 hectare site has a custom designed infrastructure to reduce the risk of flooding to homes and promote biodiversity.  Rain water is collected in channels which drain into ponds and soakaways.  The water is purified through this process and it returns to the rivers to be taken out to sea.  The various stages help slow down the travel of water, allowing the water to naturally infiltrate the ground, helping to prevent flash flooding in extreme weather events.  As climate change has increased the risk of flooding across Britain, the SUD system mitigates the risks with lower costs for maintenance.  There are many special features in the West of Waterlooville SUDS.  Such as the way the elements are incorporated into the landscaping, creating areas of greenery and ponds, encouraging residents to use the open space.

Developers Grainger and Taylor Wimpey have been keen to implement a system which enhances the nature of the site from the earliest stages.  They were ahead of the time, by including such a large and high specification system in the masterplan before the government requirement which came into existence in April 2015.

The Berewood SUDs are part of a longitudinal study by the University of Portsmouth, which will provide evidence for national guidance.  More study days are planned for the winter when there will be more rain!

6 responses to “SUDs Explored

  1. Given that we are always being encouraged to conserve water, why isn’t the filtered drainage water pumped to reservoirs rather than being dumped at sea ? Surely, at the start of such a large development, there was a golden eco opportunity missed.

  2. Pingback: Was An Opportunity Missed ? | WrAnTz

  3. Returning rainwater to the sea allows the natural water cycle to continue, providing habitat to the downstream ecology of the River Wallington. Transferring the water to reservoirs would require additional piping and pumping. This would require additional landscape engineering, more energy (for pumping and treatment) and cause more disruption to wildlife, in effect causing more harm than benefit. It is not feasible.

    The master plan does detail the employment buildings to use rainwater harvesting for flushing of toilets. Residential gardens will be provided with a water butt and the internal fittings are designed to conserve water. There are some potential opportunities for water storage for irrigation in future stages of development, particularly in relation to the proposed allotments.

    • From my own observations prior to the formal development of this area, there was a huge amount of disruption to the area when the drainage systems were installed. So the wildlife etc. was already being disrupted. SInce the construction has started there has been even more ongoing disruption to local wildlife. All that of course is temporary. As for “Returning rainwater to the sea allows the natural water cycle to continue, providing habitat to the downstream ecology of the River Wallington”, Have provisions been made to restrict this flow, so that the residents of Wallington village, already under pressure from flood waters, aren’t suddenly presented with additional volumes of waste water from Waterlooville. Especially given that, in years to come, the Wallington river will no doubt be getting additional water from the new Wellbourne development. After all water, just like air, will take the path of least resistance.

  4. I’m on Barewood. Actually surprised we don’t get given rain water butts!?

    Any way… wondered what was going on when I saw a mini crowd wandering about! Looking forward to seeing barewood develop and then maybe we can just knock over Waterlooville centre and that can also be re developed!

  5. Alex, isn’t Berewood a part of the WOW development. In which case, according to reply above, you should have a water butt.

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