Natural Flood Management and Sustainable Drainage in Calderdale

2B has supported Amanda as a founding trustee of Slow The Flow, since its inception following the devastating floods of Boxing Day 2015 in the Calder Valley, which had a personal impact when her house in Mytholmroyd was flooded.

Slow The Flow is run by a passionate and dedicated group of volunteers, including experts in relevant fields. It has quickly become a well known and respected body in the world of Natural Flood Management (NFM) and Sustainable Drainage Systems (SuDS).

Amanda McDermott – Founding Trustee at Slow The Flow

Amanda has led Slow The Flow (STF)'s efforts to encourage SuDS projects in Calderdale, through education and engagement. This has included activity such as feeding into the Calderdale Flood Action Plan, working with Calderdale Council on their planning guidance for flooding, and working with the Environment Agency to determine what is needed in terms of data and analysis, to help achieve STF's aim of being well informed about NFM, SuDS, and how it can benefit the local geography.

Specific projects and activities of interest include:

Amanda-Slow The Flow Diagram

The SWIG award-winning 'You Can Slow The Flow' project, providing accessible information on how Calderdale's residents and workers can make a difference.

Amanda-Slow The Flow Diagram

Opportunity Mapping to try and demonstrate how widespread the opportunities for NFM and SuDS could be, and encourage action.


The Rain Garden Planters at Hebden Bridge Town Hall are a collaborative community project, a demonstration feature for the 'You Can Slow The Flow' project, to encourage local uptake of SuDS. (image by Matt Radcliffe Photography)


Speaking about urban SuDS at public events, including the National STF 'Community Led NFM' Conference


Engaging with the SOURCE group, an innovative partnership bringing together all those trying to protect the environment in Calderdale through NFM.

For more on Slow The Flow's work, please visit the website here:

For more information on NFM generally, and how 2B can help, have a look at our Natural Flood Management page, and with any further queries, just drop us a line.