SuDS in London - a guide

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BS Concret Order Valu Case study 10 – Permeable paving Location London Borough of Newham Date 2012 (Temporary) SuDS components Temporary permeable paving installation Objectives To provide a coach park that would have a minimal impact on the environment so the site could be returned to its original use as sports fields after the 2012 Games. Outcome The sub-base was designed to support Marshalls Priora permeable concrete blockpaving, using graded crushed rock aggregate to provide structural strength, integrity and voidage for attenuation. This was placed on a geogrid for additional strength. Creating a void at the joint between the Priora blocks at the surface allowed water to pass through the pavement at source. The joint void was filled with 2-6mm clean stone to provide a permeability rate of 18,750L/s/ha, to cope with any storm event. No additional positive drainage was required. Images courtesy of Marshalls Installation complete Aerial view of site under construction 58 3 SuDS components
3.11 Detention basins Detention basins are generally dry, low spots within a landscape. They can be designed as multi-functional spaces during dry conditions. During storm events, water is channelled to these basins where it is ‘detained’ before release at a controlled rate. Image courtesy of Urbanstein Basins usually require lots of space. However, as they can be designed to provide alternative functions, they can be incorporated into relatively dense urban environments as a soft or hard landscape feature. Benefits Attenuation: detention basins provide storage for stormwater before slow release through a restricted outlet and flow control. Interception: detention basins provide a large surface and depth for holding surface water runoff. If landscaped with soils that are sufficiently permeable, they provide interception by infiltration of small rainfall events. Amenity: as a multi-functional space, detention basins have a variety of uses, such as car parking, play, public open space and habitat. Hard detention basin with multiple functionality for recreation Biodiversity: soft landscaped detention basins can be planted with marginal and wetland vegetation to provide habitat and a source of food for insects and mammals. Planting that enhances the ecological value also increases the drainage properties of the soil to create a more effective component. Design considerations The form, depth and profile of the basin depend on topography and existing features, such as trees and vegetation. Detention basins’ scale should complement the landscape and townscape character. 59 3 SuDS components
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SuDS in London - a guide November 2
Page 3 and 4:
Introduction
Page 5 and 6:
II Who is the guidance for? Primari
Page 7 and 8: 1 Principles of SuDS
Page 9 and 10: 1.2 Wider benefits The ambition for
Page 11 and 12: 1.3.1 Water quantity SuDS mitigate
Page 13 and 14: 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: Case study 9 - Permeable paving Loc
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 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
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5.17 LuL depot roof, Middlesex Loca
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5.18 A23 Coulsdon Bypass, Farthing
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5.19 London Sustainable Industries
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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
Page 147 and 148:
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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