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Fluxus

Fluxus provides a database dedicated to floods and extreme flows. This database is produced using a climate-hydrological-hydraulic modeling chain developed by Hydroclimat. These data meet a variety of engineering needs, including flood risk management, land use planning, and infrastructure resilience enhancement.

Fluxus relies on three complementary flood modeling approaches:

1.Physically based hydrodynamic models
2.Data-driven statistical models
3.Hybrid flood models

Fluxus simulates the dynamics, frequency, and severity of floods under changing climate conditions. Fluxus provides daily to annual indicators on floods from 1951 to 2100. It thus ensures a consistent, high-resolution basis for flood risk management, land use planning, infrastructure resilience, and the development of adaptation strategies across Europe.

Flood database specifications

Header iconSpecification
Header iconDescription

Experiment

CMIP6

Scenarios

4 Shared Socioeconomic Pathways:

  • SSP1-2.6 (Low-carbon, +1.8°C)
  • SSP2-4.5 (Intermediate, +2.7°C)
  • SSP3-7.0 (High-emission, +3.9°C)
  • SSP5-8.5 (Very high-emission, +4.4°C)

Global Warming Levels (GWLs):

  • +1.5 °C (global) / +2 °C (France – TRACC)
  • +2 °C (global) / +2.7 °C (France – TRACC)
  • +3 °C (global) / +4 °C (France – TRACC)

Climate models

18 bias-corrected GCMs

Flood models

MHYST, HEC-RAS, LISFLOOD, LSTM Flood model

Spatial Resolution

30 m

Temporal resolution

Daily to annual (1951–2100)

Variables

Flow discharge, peak flow, return period, inundation extent, flood depth

Format

NetCDF, GeoTIFF, or vector

Flood indicators

The following table presents the main flood indicators available in the Fluxus database. These indicators are used to assess flood risks, map exposure, and plan resilience. Additional indicators can be developed on request to meet regional, sectoral, or project-specific needs.

Header iconNo.Header iconIndicatorHeader iconDefinition

01

River flooding

Flood recurrence : annual maximum daily discharge for different return periods

Flood occurrence : number of flood days.

02

Fluvial flooding

River water depth for different return periods, with and without defenses.

03

Pluvial flooding (Rainfall flooding)

Pluvial water depth for different return periods with and without defenses.

04

Groundwater rise flooding

Groundwater flood water depth for different return periods.

05

Hydraulic flooding

Flood hazard mapping based on hydraulic modeling including water depth, inundated surface and flow velocity for various return periods.