SuDS in London - a guide

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4.1 SuDS and the urban realm This section shows how SuDS can be integrated into the design and management of some typical London streets. SuDS should be designed in parallel with other urban design considerations, reflecting the unique opportunities and constraints created by every London street. Streets account for 80% of London’s public realm. They are not just corridors for movement; they contribute to the city’s sense of place and identity and often reflect London’s diverse communities. Well designed streets are essential for London’s future growth, both in terms of population level and economic activity. Their function for pedestrians and cyclists, as well as other users, is growing and the design of streets needs to facilitate this. Improvements to streets can directly unlock wider benefits beyond movement, including health benefits for London’s growing population. These benefits can be realised at a variety of levels, from minor interventions to transformations of large junctions and gyratories. Streets are places too SuDS are an important component of this transformation, addressing surface water flood risk, improving air quality and contributing to a higher quality of life. Eight street scenarios are illustrated below to show how SuDS may be provided within the many different street types across London. Although based on specific examples of streets in London, the illustrations are purposefully generic, aiming to demonstrate the art of the possible in a variety of locations and environments, rather than to provide a strictly applicable set of design criteria. 66 4 SuDS in London’s streets
4.2 Street scenarios Street scenario 1 A roadway with large tracts of land alongside, between slip roads and interchanges. This expansive leftover space has great potential to incorporate extensive SuDS creating and linking habitats, as well as improving and using adjacent land. Potential SuDS components 1. Wet swale, see 3.6 4 8 2. Filter drain, see 3.5 3. Filter strips, see 3.4 9 4. Tree planting, see 3.9 5. Ponds, see 3.13 6. Retention basins as overflow, see 3.12 5 3 7. Infiltration where conditions allow, see 3.3 8. Living roofs, see 3.2 6 1 2 7 67 4 SuDS in London’s streets
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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
Page 15 and 16: 1.3.4 Biodiversity London’s natur
Page 17 and 18: 2.1 What is unique about London? Th
Page 19 and 20: Hampstead Ridge Valley Lea Valley L
Page 21 and 22: • Amenity/biodiversity: the natur
Page 23 and 24: 2.7 Townscape Townscape is the mix
Page 25 and 26: 2.9 London’s green infrastructure
Page 27 and 28: 2.13 Archaeology London’s history
Page 29 and 30: 3 SuDS components
Page 31 and 32: A number of case studies illustrati
Page 33 and 34: 3.2 Structures Roofs and walls can
Page 35 and 36: Case study 1 - Structures Location
Page 37 and 38: 3.3 Infiltration systems London’s
Page 39 and 40: Case study 3 - Infiltration systems
Page 41 and 42: 3.4 Filter strips Filter strips are
Page 43 and 44: 3.6 Wet swales and dry swales Swale
Page 45 and 46: Case study 5 - Swale Location Mill
Page 47 and 48: Maintenance Channel systems require
Page 49 and 50: Case study 6 - Bioretention Locatio
Page 51 and 52: 3.9 Trees Trees in the hard landsca
Page 53 and 54: Street trees: biodiversity Where tr
Page 55 and 56: 3.10 Permeable paving Permeable pav
Page 57 and 58: Case study 9 - Permeable paving Loc
Page 59 and 60: 3.11 Detention basins Detention bas
Page 61 and 62: 3.12 Attenuation and storage tanks
Page 63 and 64: Design considerations Sedimentation
Page 65: 4 SuDS in London’s streets
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
Page 75 and 76: 5 Case studies
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
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5.21 Alnarpsgården Swedish Univers
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5.22 Benthemplein (Water Square) Lo
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5.23 Rue Garibaldi Location Lyon Fr
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5.24 Bo01 Võstra Hamnen Location M
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6 Implementation
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Kings Cross LWT: Camley Street A so
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6.3 Drainage hierarchy SuDS designs
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7 Cost benefit
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7.2 Methodology Cost benefit estima
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4.4 LANDSCAPE WATER MANAGEMENT STRA
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Appendices
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i-Tree Eco Project (2015) Valuing L
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Movement of water from one location
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Heat island Describes urban built u
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Prevention Site design and manageme
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Team The guidance has been produced
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Photo credits 80 Swale sections TfL
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SuDS in London - a guide

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