SuDS in London - a guide
sustainable-urban-drainage-november-2016
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5.3 Kenmont Gardens<br />
Location<br />
Kensal Green<br />
<strong>London</strong> Borough of Hammersmith & Fulham<br />
Extent<br />
435m²<br />
Cost<br />
£300,000 (total scheme)<br />
Date<br />
2015<br />
Credits<br />
<strong>London</strong> Borough of Hammersmith & Fulham<br />
Project Centre Ltd<br />
FM Conway<br />
Green Blue Urban<br />
<strong>SuDS</strong> components<br />
Permeable pav<strong>in</strong>g<br />
Ra<strong>in</strong> gardens<br />
Geocellular storage<br />
Tree plant<strong>in</strong>g<br />
Summary<br />
Transformation of highway to<br />
neighbourhood garden.<br />
Project description<br />
The garden was previously a carriageway<br />
that had been pedestrianised. The<br />
carriageway still existed, but had been<br />
closed off with bollards.<br />
The project is a Neighbourhood and<br />
Corridor Scheme, developed to <strong>in</strong>corporate<br />
<strong>SuDS</strong>. It is funded through a comb<strong>in</strong>ation<br />
of TfL LIP Fund<strong>in</strong>g and Lead Local Flood<br />
Authority Fund<strong>in</strong>g.<br />
Objectives<br />
• Improve an under-used area through<br />
public realm works, <strong>in</strong>clud<strong>in</strong>g plant<strong>in</strong>g,<br />
pav<strong>in</strong>g and light<strong>in</strong>g improvements<br />
• Incorporate <strong>SuDS</strong> features<br />
with<strong>in</strong> the design<br />
• Retrofit <strong>SuDS</strong> to the exist<strong>in</strong>g dra<strong>in</strong>age<br />
system of a deep comb<strong>in</strong>ed storm<br />
and foul sewer, fed by gullies that<br />
were formerly <strong>in</strong> the carriageway<br />
Actions and results<br />
• Surface flow is directed towards<br />
ra<strong>in</strong> gardens and trees<br />
• Trees are planted <strong>in</strong> l<strong>in</strong>ked trenches that<br />
<strong>in</strong>corporate below-ground attenuation<br />
• Water flow is held and slowed with<strong>in</strong><br />
attenuation features before pass<strong>in</strong>g<br />
through control chambers and <strong>in</strong>to<br />
the exist<strong>in</strong>g dra<strong>in</strong>age system<br />
• Permeable pav<strong>in</strong>g allow<strong>in</strong>g <strong>in</strong>filtration<br />
• Community <strong>in</strong>volvement throughout<br />
the project, with concept designs<br />
sent out for public consultation <strong>in</strong><br />
September 2014, from which a positive<br />
response was received and a preferred<br />
option selected. A dialogue was<br />
ma<strong>in</strong>ta<strong>in</strong>ed with College Park Residents<br />
Association (CoPRA) and Kenmont<br />
Primary School throughout the process<br />
Benefits<br />
• The design restricts runoff to greenfield<br />
rate for events up to the one <strong>in</strong> 10<br />
year average recurrence <strong>in</strong>terval<br />
(ARI) with exceedance routes<br />
81 5 Case studies