Sources of Flooding

Flood water can originate from a number of different sources. It is important to identify which of these sources of flooding your property or workplace may be at risk from. Information on each of these sources can be found below.

In general, flood risk in Derby can be categorised into the following sources, although in many cases property may be at risk from a number of different sources:

  • Fluvial (Main River) flooding It is the flood risk management responsibility of the Environment Agency. 
  • Fluvial (ordinary watercourse) flooding is the flood risk management responsibility of Derby City Council as the Lead Local Flood Authority; however the responsibility to maintain ordinary watercourses is the responsibility of the riparian owner of the watercourse.
  • Surface water flooding is the flood risk management responsibility of Derby City Council as the Lead Local Flood Authority.
  • Sewer flooding in Derby is the flood risk management responsibility of Severn Trent Water.
  • Highway flooding is the flood risk management responsibility of Derby City Council as the local highways authority. However the highways authority is only responsible for managing surface water that falls within the highway curtilage.
  • Groundwater flooding is the flood risk management responsibility of Derby City Council as the Lead Local Flood Authority.
  • Reservoir Flooding is the flood risk management responsibility of the Environment Agency, although reservoir owners and operators have the responsibility to ensure reservoirs are safe and adhere to strict regulations. 

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