SuDS in London - a guide

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Benefits • Air quality monitors, placed on either side of the grass, measure particulate matter and nitrogen dioxide levels, to demonstrate the extent of air quality benefits from the greening. Lessons learned • The bioretention basin will include the same plant species as the rest of the roadside planted areas to test how these species perform when experiencing runoff from the surrounding area, compared to conventional planting beds Images courtesy of George Warren • Should the species thrive in this environment, the aim is to repeat this along other stretches of highway within the borough to help tackle air quality and flooding issues Under construction Complete 92 5 Case studies
5.9 Mile End Green Bridge Location Mile End Road London Borough of Tower Hamlets Extent 2000m² Cost £75,000 Date 2010 Credits Design for London London Borough of Tower Hamlets Mile End Park muf architecture/art Tim O’Hare Associates J & L Gibbons SuDS components Green roof/bridge Tree planting Soil amelioration 93 5 Case studies Summary Reinstatement of soils and planting on green bridge. Project description The bridge provides a key connection within Mile End Park by spanning the Mile End Road. As part of High Street 2012 works, the existing green bridge was rejuvenated to incorporate more planting. The proposals had to consider the requirements of the A11 below. Traffic flows on this part of the TfL road network could not be impeded during the works or maintenance operations once planting was established. Objectives • Enhance park connectivity • Increase the impact of the planting from the road below and the parkland above • Improve soil infiltration • Encourage biodiversity Actions and results • The soil required de-compacting and amelioration to increase its capacity to retain water • Soil depths were increased by 250mm to allow for greater root-zone and better plant establishment • Trees were planted at a high density to improve their resilience to the shallow soil profile • The central median was removed to create greater openness Benefits • The young plant stock established faster than previous semi-mature tree planting • The dense blocks of planting and mix of species provide increased biodiversity • The planting had immediate impact due to its density and educational interest as an emerging ‘upland’ ecology • The bridge is more successfully integrated into the park landscape • The planting creates a distinctive feature and is more visible from the A11 below
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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
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 and 66: 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
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: 5.8 Talgarth Road Location Talgarth
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 and 118: 5.21 Alnarpsgården Swedish Univers
Page 119 and 120: 5.22 Benthemplein (Water Square) Lo
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
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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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