The publicly available mapping (www.slowtheflow.net/nfm-suds-opportunities/) identifies realistic locations on a field/street level of detail, where residents, businesses and organisations can contribute to flood alleviation through natural and sustainable interventions, and gives indications as to what interventions might be appropriate in those locations.
A new report on this mapping is a rare attempt to quantify the potential benefits of SuDS and NFM on a catchment scale, based on the identified opportunities in the Mytholmroyd pilot area.
The report has been prepared with the support of partners including the SOURCE partnership, Environment Agency, Calderdale Council, and Yorkshire Water. It shows that, when extrapolated across Calderdale, almost 2 million m³ of water could possibly be attenuated using NFM and SuDS.
SuDS and NFM can be implemented by planting more trees, hedgerows and greening roofs; introducing swales, leaky dams and attenuation ponds into the natural landscape; adding water butts to downpipes and changing impermeable surfaces to permeable. If implemented widely enough throughout the Calder Valley, they could have a significant impact on flood mitigation in the future.