Ste-Adresse-Plage

18°C Water temp · Jul 22

France Coastal 1 - Excellent 18°C

Satellite image of STE-ADRESSE-PLAGE — Satellite image © Esri

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Water

Coastal waters of the Seine Bay and English Channel. The study includes 3D hydrodynamic modelling of a local model with bathymetry data and tidal conditions.

Location

Three bathing beaches are covered in this study: Saint-Jouin-Bruneval, Sainte-Adresse, and Le Havre, located along the coast between Le Havre and Saint-Jouin-Bruneval in France.

Water Quality

Water quality assessment based on E. coli coliform bacteria monitoring. Exceedances of 500 EC/100mL and 1000 EC/100mL thresholds were modelled and analysed across multiple scenarios. Background E. coli levels and bacterial decay rates (T90 values of 20h, 30h, and 40h) were considered.

Risks

Bacterial contamination from sewage discharges during dry weather and rainfall events. Discharge points from the Seine and dumping sites (clapages) were identified as pollution sources. Semi-annual and monthly rainfall scenarios showed varying impacts on water quality at each beach.