The Sussex Flow Initiative has been running since 2012, working with and restoring natural processes to reduce flood risk. Each year we produce an annual report on what the project has delivered. These reports focus primarily on the amount of habitat created and restored, as well as the amount of water stored through the variety of natural flood management measures.

What is social and natural capital?
Social capital is the benefits delivered to human health and wellbeing, and natural capital is the additional benefits delivered to nature and wider society, such as carbon storage for climate regulation, pollination for food production, and water purification. 

Working with New Economics Foundation, we attempted to document the true societal value of the partnership project work delivered by the project.

Social Capital Benefits of Sussex Flow Initiative
​Using bespoke surveys and spreadsheets, we found some really interesting insights into the true societal value of this project, here are some of the findings:

• SFI is really effective at improving the technical NFM skills of the people it involves, with an increase from a low starting point of 28.8% to 65.2%.
• People are more likely to take further action for nature and the environment as a result of their contact with SFI.
• The biggest gains came from increasing people’s connection with nature. People who attended one-off events felt more connected to nature after engaging with SFI.

Natural Capital Benefits of Sussex Flow Initiative
The UK government’s Ecosystem Services Databook was used to help calculate the wider natural capital benefits that the project has brought to society. In the eight years of the project, it has generated an incredible £1 million of public and natural capital benefits. This equates to a whooping £125,000 of benefits for every year of the project since 2012.

• Every £1 spent in delivering natural flood management generated >£2.14 of additional ecosystem value for the public good.
• The greatest societal value was generated through volunteering, water quality and flood mitigation aspects of the project.

These figures are based on seven key ecosystem services; timber provision, air pollution removal, carbon sequestration, flood regulation, water quality improvements, biodiversity and volunteering. Due to insufficient information/data it was not possible to calculate all the multiple societal benefits of all the work carried out by the project. Therefore, the true value will be greater than the £1 million. A significant portion of the work undertaken by the project delivers benefits that are incremental and will accrue greater value each year, for example the carbon storage will accrue over the lifetime of trees planted.

Having this evidence is an incredibly powerful tool, and a fantastic step to demonstrate real and wider value of the nature-based solution work of SFI.