PPG25 states that every new development should undergo a flood risk assessment before submission for planning permission and promotes the use of 'Substainable Urban Drainage Systems' (SUDs) to achieve this.

The content of this website is based on Naylor's solutions to stormwater management and products related both to controlling flash flooding and recycling/reusing rain water (water harvesting).

Current guidance/legislation promotes a more sustainable approach to drainage design replicating nature.

References:

PPG25	Development and Flood Risk (Issued June 2002)
CIRIA	CS22 - SUDs Design Manual
CIRIA	CS86 - Source Control using Constructed Pervious Surfaces
CIRIA	C609 - Hydraulic, Structural Water Quality Advice
CIRIA	Rl 56- Infiltration Drainage - Manual of Good Practice
CIRA	C697 - The SUDs Manual
Local Agenda 21	Substainable Development
Water Framework Directive	Controls, Discharge of Water Environment