Projects

Solar PV · France · 2025

4.5 ha solar PV plant

Country

France

Area

4.5 ha, 4 to 5 MWp

Return periods

25, 50 and 100 years

Full hydrological and hydraulic study of the plant: pluvial flooding, erosion and stormwater management, up to the detailed drainage design.

• Kiefer design storms and analysis of upstream inflows
• HEC-RAS 6.6 2D modelling: flood extent, maximum water depth and flow velocity
• Hazard and erosion mapping, risk reduction measures
• Preliminary then detailed drainage design

River · France · 2025

Wet meadow restoration along a river

Country

France

Extent

3 km of river, 62 km² catchment

Return periods

2, 10 and 100 years

The study assesses the hydraulic effects of restoring wet meadows down to the confluence. The aim: encourage overbank flow in natural areas without increasing the risk in inhabited areas.

• Q2, Q10 and Q100 flows by hydrological transfer and the regionalised Crupédix method
• Floods of 6.1, 11.12 and 23.53 m³/s simulated with a downstream condition set by the receiving river
• HEC-RAS 6.6 2D models, existing and design conditions, including crossing structures
• Comparison of water levels and analysis of surcharging at the structures

River · France · 2026

Restoration of a river and its structures

Country

France

Extent

River, tributary and two hydraulic structures

Flows studied

From QMNA5 reduced by 30% to Q50

Feasibility study for the restoration of a river and its tributary: flows, hydraulic structures including a mill, and impacts of the design options.

• Coupled 1D/2D HEC-RAS model: main channel, floodplains, confluence and structures
• Eight configurations compared: existing conditions and two levels of restoration ambition, structure open or closed
• Six reference flows, from low flow to the 50-year flood
• Maps of water depths, maximum velocities and overflow areas

Wind · Oman · 2025

Two wind farms

Country

Oman

Assignment

Post-development check

Events

T25 and T100

Check of surface water recession on both farms: how long water stays above the drainage threshold, and compliance with the project owner’s criterion.

• Unsteady HEC-RAS 6.6 2D modelling of runoff, ponding and drainage after rainfall
• Recession time computed with an effective drainage threshold of 0.01 m and extended simulations
• Recession time maps for T25 and T100, with analysis of critical low areas

Result. The facilities of one of the two farms drain in less than 48 h, against a 72 h criterion.