Flood-risk intelligence
Interactive dashboards combining Environment Agency flood data with Net-Present-Value damage modelling, Natural Flood Management activity, and climate-uplift scenarios. Built to inform investment-grade decisions on nature-based solutions across England's most exposed catchments.
9 management catchments across Bristol Avon, Somerset, Devon and Cornwall. £28 Bn unprotected flood-risk NPV mapped; climate-change uplift toggle; drill-down into the Tamar.
Sub-catchment analysis for the Tavy and Tamar tributaries. Town-level NPV models, Environment Agency defence coverage, railway exposure, and Natural Flood Management opportunity scoring.
Boundaries: Environment Agency WFD Surface-Water Management Catchments (Cycle 3) and Operational Catchments (Cycle 2). Flood zones from EA Risk of Flooding from Rivers and Sea. Defended-area shapes from EA Areas Benefiting from Defences.
NPV calculated on a 100-year horizon using Green-Book-style discounting (3.5 %) and EA Multi-Coloured Manual residential / non-residential depth-damage curves, scaled per catchment urbanisation.
The +30 % toggle applies the EA Central Allowance for South-West river-flow peak by the 2080s. Monetary metrics are scaled directly; floodplain extent and exposed buildings grow more modestly to reflect the non-linear flow–exposure relationship.
Building counts, expected annual losses and protection-coverage values are plausible scaled estimates seeded per-catchment from area, urbanisation index and historic-flood multiplier. They are not authoritative EA outputs; treat as illustrative for prioritisation, not as the basis for individual asset claims.