SuDS in London - a guide

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Lessons learned • Previously, the yard’s ground was slightly concave, the middle of the yard being slightly lower than the ground along the facades. To channel all the stormwater from the yard to the gutters along the facades, the middle of the yard was raised. Adjusting the topography has affected the quality of the space Images courtesy of Anders Folkesson Threshold detail SuDS pond acting as a central recreational feature 118 5 Case studies
5.22 Benthemplein (Water Square) Location Rotterdam Netherlands Extent 0.95ha Cost £3.175m (Total scheme) Date 2013 Credits City of Rotterdam Schieland and Krimpenerwaard Urbanstein Wallaard ACO Topcourts SuDS components Detention basins Rills Summary Multi-functional public realm regeneration. Project description Benthemplein is in central Rotterdam, north-east of Rotterdam Centraal station. It is bounded by major city roads and enclosed by medium rise buildings. The low permeability paving of the site meant it was not fulfilling its potential of relieving localised flooding in adjacent areas. This put pressure on the combined sewer overflow of the Nieuwe Maas. Due to the proximity to areas of flooding and the opportunity for restructuring of space, the City of Rotterdam and stakeholders, including church and student communities, looked to re-imagine the function of the square, as part of the Rotterdam Climate Initiative. Objectives • Reduce flood risk • Provide recreational opportunities Actions and results • Detention basins increase the attenuation storage capacity of the site to 1,700m³. Uniquely, the three detention basins provide a recreation space that is transformed as water is attenuated in the basins • Rills convey water from the surrounding ground surfaces and buildings into the detention basins. Each basin has its own sub-catchment taking runoff from certain surfaces and buildings and incorporates waterfalls, fountains and an outside baptistery for use by the church Benefits • Water management has the added benefit of creating a novel multiple-use public realm space • Approximately 4,000m² of existing parking and street access has been kept to allow space for vehicles • Interventions such as the baptistery, sports goals and shaded seating has allowed for a range of stakeholders’ needs to be addressed 119 5 Case studies
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SuDS in London - a guide November 2
Page 3 and 4:
Introduction
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II Who is the guidance for? Primari
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1 Principles of SuDS
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1.2 Wider benefits The ambition for
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1.3.1 Water quantity SuDS mitigate
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1.3.2 Water quality Surface water i
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1.3.4 Biodiversity London’s natur
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2.1 What is unique about London? Th
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Hampstead Ridge Valley Lea Valley L
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• Amenity/biodiversity: the natur
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2.7 Townscape Townscape is the mix
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2.9 London’s green infrastructure
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2.13 Archaeology London’s history
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3 SuDS components
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A number of case studies illustrati
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3.2 Structures Roofs and walls can
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Case study 1 - Structures Location
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3.3 Infiltration systems London’s
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Case study 3 - Infiltration systems
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3.4 Filter strips Filter strips are
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3.6 Wet swales and dry swales Swale
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Case study 5 - Swale Location Mill
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Maintenance Channel systems require
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Case study 6 - Bioretention Locatio
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3.9 Trees Trees in the hard landsca
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Street trees: biodiversity Where tr
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3.10 Permeable paving Permeable pav
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Case study 9 - Permeable paving Loc
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3.11 Detention basins Detention bas
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3.12 Attenuation and storage tanks
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Design considerations Sedimentation
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4 SuDS in London’s streets
Page 67 and 68: 4.2 Street scenarios Street scenari
Page 69 and 70: Street scenario 3 An important foca
Page 71 and 72: Street scenario 5 A well-connected
Page 73 and 74: Street scenario 7 A local shopping
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Page 77 and 78: 5.1 Priory Common rain meadow Locat
Page 79 and 80: 5.2 Upminster Bridge swale Location
Page 81 and 82: 5.3 Kenmont Gardens Location Kensal
Page 83 and 84: 5.4 Derbyshire Street Pocket Park L
Page 85 and 86: 5.5 Renfrew Close Location London B
Page 87 and 88: 5.6 Islington Town Hall Location Up
Page 89 and 90: 5.7 Rectory Gardens Location Hornse
Page 91 and 92: 5.8 Talgarth Road Location Talgarth
Page 93 and 94: 5.9 Mile End Green Bridge Location
Page 95 and 96: 5.10 Queen Caroline Estate Location
Page 97 and 98: 5.11 Bridget Joyce Square, Australi
Page 99 and 100: 5.12 Crown Woods Way Location Eltha
Page 101 and 102: 5.13 Hackbridge Location Hackbridge
Page 103 and 104: 5.14 Goldhawk Road Location Shepher
Page 105 and 106: 5.15 Firs Farm Wetlands Location Wi
Page 107 and 108: 5.16 Salmons Brook Glenbrook Stream
Page 109 and 110: 5.17 LuL depot roof, Middlesex Loca
Page 111 and 112: 5.18 A23 Coulsdon Bypass, Farthing
Page 113 and 114: 5.19 London Sustainable Industries
Page 115 and 116: 5.20 Great Kneighton / Clay Farm, C
Page 117: 5.21 Alnarpsgården Swedish Univers
Page 121 and 122: 5.23 Rue Garibaldi Location Lyon Fr
Page 123 and 124: 5.24 Bo01 Võstra Hamnen Location M
Page 125 and 126: 6 Implementation
Page 127 and 128: Kings Cross LWT: Camley Street A so
Page 129 and 130: 6.3 Drainage hierarchy SuDS designs
Page 131 and 132: 7 Cost benefit
Page 133 and 134: 7.2 Methodology Cost benefit estima
Page 135 and 136: 4.4 LANDSCAPE WATER MANAGEMENT STRA
Page 137 and 138: Appendices
Page 139 and 140: i-Tree Eco Project (2015) Valuing L
Page 141 and 142: Movement of water from one location
Page 143 and 144: Heat island Describes urban built u
Page 145 and 146: Prevention Site design and manageme
Page 147 and 148: Team The guidance has been produced
Page 149 and 150: Photo credits 80 Swale sections TfL
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SuDS in London - a guide

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