What is natural flood management?
The Calderdale landscape means that rainwater can flow rapidly down the hillsides into our valleys causing flooding to occur. This can happen in a summer thunderstorm when the ground is dry and hard or, more often, after a long period of wet weather when the ground is already very wet. Natural flood management works to naturally hold or slow the flow of water during periods of heavy or persistent rain. This helps to protect the towns and villages below.
Natural flood management complements the flood defence engineering work that is happening across Calderdale. Depending on the measures taken it can deliver other environmental benefits too, including:
- Providing habitat for wildlife
- Filtering water entering the river and acquifers
- Helping to store carbon
It is an evolving area of work nationally, regionally and locally. It is particularly developed in Calderdale where our unique geography makes us susceptible to very rapid flood events as water runs off the hills.