SuDS in London - a guide

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Lessons learned • Attention to detail during planning and design phases and supervision during construction is crucial in achieving a scheme with complex sub-catchments HANGOUT • By fulfilling city authority climate objectives, it is possible to receive extra funding for similar schemes. Rotterdam raised an extra £700,000 WATER SQUARE BENTHEMPLEIN Rotterdam, the Netherlands Images courtesy of Urbanstein Overview of completed scheme Detention basin 120 5 Case studies Catchment areas catchment area of basin 1 catchment area of basin 2 catchment area of the deep basin 3 Two in one The water square combines water storage with the improvement of the quality of urban public space. The water square can be understood as a twofold strategy. It makes money invested in water storage facilities visible and enjoyable. It also generates opportunities to create environmental quality and identity to central spaces in neighborhoods. Most of the time the water square will be dry and in use as a
5.23 Rue Garibaldi Location Lyon France Extent 15ha Cost £19.3m (Total scheme 1st phase) Date 1st phase 2014 Credits Grand Lyon Atelier des Paysages SuDS components Retention basins Swales Soakaways Depaving Integrated cycleway and SuDS Summary Transformation of an urban motorway to a planted boulevard and high quality civic space. Project description Rue Garibaldi, east of the River Rhine, is a north to south six-lane carriageway, constructed in the late 1960s. It is fronted with high storey buildings and features that were characteristic of an urban motorway. The environment for pedestrians and cyclists is hostile. The configuration and high capacity of the streetscape exacerbated the effects of urban heat island. Air (principally NOx and PM) and water quality was low (principally hydrocarbons and total suspended solids). Runoff into the combined sewer overflow was high, particularly during heavy or prolonged peak rainfall, considering the sub-catchment area of 65,000m². These conditions, coupled with a carriageway reconfiguration proposal, presented the opportunity to reconsider hydrological management of the 2.6km stretch of highway Objectives • Minimise runoff into the combined sewer overflow by installing a SuDS scheme • Improve connection between districts bordering Rue Garibaldi by design and planning consideration, within the wider green space context of the area • Reduce maintenance and utility costs by installing a water recycling system • Reconfigure carriageway function by installing separate carriageways for public transport, pedestrians, cyclists and other vehicles • Improve management of water quality and mitigate urban heat island effect by planting trees and installing a SuDS scheme Actions and results • Retention basins were created from the redesign of an existing underpass. An automated pumping system was installed to allow water to be recycled for street cleaning vehicles and irrigation for public realm planting. 121 5 Case studies
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SuDS in London - a guide November 2
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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
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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 and 118: 5.21 Alnarpsgården Swedish Univers
Page 119: 5.22 Benthemplein (Water Square) Lo
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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