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The addition of impermeable surfaces will lead to an increase in the quantity of surface water runoff, which can overload the drainage system / downstream watercourse and lead to potential flooding.
Before society added so many roads, parking lots and buildings, roughly 80 percent of the rain that fell in a natural catchment would typically soak into the ground where it would be filtered and cleansed before gradually recharging our aquifers.
Infiltration is a priority process for Sustainable Drainage Systems (SuDS) to ensure control of water as close as possible to the point of falling and mimic natural processes.
With increasing population combined with climate change bringing less rainfall per year, the stress on potable water will continue to increase.
Stormwater runoff can convey pollution from a wide variety of sources. This pollution can be mobilised during storm conditions, adversely affecting water quality and wildlife habitat in receiving waters.
Hydro Consultancy is the engineering business of Hydro International. Hydro Consultancy provides expert technical support for flood risk and surface water management in the UK to meet developers’ requirements plus local authorities’ growing need for expert technical support as they respond to new legislation.