Legend

Strategic Flood Risk Assessment - Groundwater Sewer Artificial Flood Risk Map

• Area Susceptible To Groundwater Flood © Environment Agency
  • less than 25%
  • between 25% and 49.9%
  • between 50% and 74.9%
  • 75% or more
• Borough Boundary
• Detailed River Network © Environment Agency
  • Main River
  • Ordinary Watercourse
  • Main River Culvert
  • Ordinary Watercourse Culvert
• Incident - Thames Water
  • 0 to 10 incidents reported
  • 10 to 20 incidents reported
  • 20 to 30 incidents reported
  • 30 to 40 incidents reported
• Increased Potential for Elevated Groundwater - GLA Drain London
  • Consolidated
  • Consolidated & Permeable Superficial
  • Permeable Superficial
• Sustainable Drainage Systems (SuDS)
• Throughflow Catchment Area (Throughflow and Groundwater Policy Zone)
• Potential Throughflow Catchment Area
• Town Centre