SLP KDBH Extracts - Flipbook - Page 102
not be delayed by the need for additional water treatment provision. Drainage
systems shall deploy surface features within the development site for water quality
purposes, unless these are demonstrated to be unviable.
Water Efficiency and Disposal
2.
Disposal of surface water must comply with the following hierarchy:
i.
Recycling/reuse;
ii.
Discharge into the ground by infiltration;
iii.
Discharge to a surface water body or watercourse;
iv.
Discharge to a surface water sewer, highway drain, or another drainage
system;
v.
Discharge to a combined sewer.
Recycling/reuse
3.
The Council recognises the need for water efficiency in all new development.
Developers must demonstrate the highest possible standards of water efficiency
through the recycling of potable, grey water and rainwater, and the use of water
efficient fittings and appliances, in order to minimise consumption to a maximum rate
of 110 litres per person per day.
Infiltration
4.
Development within areas identified as being at risk from groundwater flooding must
be subject to full and careful investigation before infiltration measures are proposed,
in order to minimise flood risk on the site and reduce risks elsewhere. The use of
infiltration systems in areas deemed to be at risk from groundwater flooding must be
agreed with the Council as Lead Local Flood Authority. On previously developed land
where there is contamination known or suspected, any infiltration proposals must be
agreed with the Environment Agency.
Discharge to watercourse
5.
Where a developer proposes that a site discharges to a watercourse, appropriate
modelling and supporting calculations must be provided to ensure sufficient receiving
capacity exists. The Environment Agency must be consulted if a proposal relates to a
Main River or an Area of Critical Drainage Problems.
Discharge to sewer
6.
Where discharge to a public sewer is proposed discharge rates must be agreed with
the Council as Lead Local Flood Authority, and confirmation obtained from the
relevant infrastructure owner.
Sustainable Drainage Systems
7.
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All development must include the use of above ground sustainable drainage
systems, in order to contribute towards wider sustainability considerations, including