Surface water means rainfall before it enters the underground drainage systems, plus groundwater and ordinary watercourses.
The Surface Water Management Plan (SWMP) follows on from the Preliminary Flood Risk Assessment, increasing the council’s understanding of the causes, probability and consequences of surface water flooding. It details surface water flooding issues on a local level, primarily concerning the health, safety and wellbeing of Portsmouth residents and businesses. It does not include extremely localised flooding caused by infrastructure failure, such as a gutter drain blocked by leaves.
The SWMP has allowed us to identify and prioritise the areas at greatest risk. The work that comes from the SWMP and later the Local Flooding Risk Management Strategy (see below) will be focused on, but not limited to, reducing the flood risks in the fourteen hotspot areas.