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Hillingdon SuDS Design & Evaluation Guide

Outline

Outline Design Biodiversity The designer should demonstrate ■■ ■■ confirm that water is clean as soon as possible along the management train using the principle of source control demonstrate water is kept at or near the surface as it flows from the beginning to the end of the SuDS management train ■■ ■■ demonstrate ecological design and the creation of habitats within the SuDS corridor confirm ‘management practices’ to enhance habitat development during maintenance. and then onwards to the wider landscape, to ensure habitat connectivity 8.5 Health and Safety by design 8.5.1 The place of water in the landscape 61 Although there are a number of risks associated with SuDS features, as there are with any landscape design, it is usually the presence of open water that is a concern. It is important to consider the place water occupies in our everyday lives and its cultural importance. Water has increasingly become appreciated for its visual, recreational and wildlife value and most people like to see and experience water in the landscape. The issue of Health and Safety is therefore not one of risk elimination but of developing a design approach that celebrates water whilst managing any real or perceived risk in a way that is acceptable to the community. London Borough of Hillingdon SuDS D & E Guide © 2018 McCloy Consulting & Robert Bray Associates

8.5.2 Aspects of Health and Safety in SuDS A number of risks associated with SuDS can be identified: This issue is considered in greater detail in the Detail Design section but the general 1. the risk of drowning approach to ‘Health and Safety by Design’ is that all parts of a SuDS design should be fully 2. slip and trip hazard accessible to people, with each element of 3. risk of disease the design considered from the health and safety perspective. 4. risk of toxicity The design of the water edge to ponds, 5. infrastructure issues – aircraft (bird strikes), highways, sewers etc. wetlands and basins is a good example of where the design allows a person to walk into and out of the feature safely in the design sequence; Outline Design A flat dry bench at the edge of the structure: a gentle slope, max 1:3 down to the water: a wet bench at permanent water level: another gentle slope into the water and another underwater level bench before deeper water. 62 London Borough of Hillingdon SuDS D & E Guide © 2018 McCloy Consulting & Robert Bray Associates

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