Compliant with Article R.214-1 of the French Environmental Code — NEW v15.87 Multi-Layer

Groundwater Drawdown — v15.87

Hydrogeological modelling of drawdown induced by a test or production pumping operation: Theis, Dupuit-Thiem and multi-layer Forchheimer/Dupuit. Automatic IOTA classification, OpenStreetMap map (Lambert 93) and a 27-page DDT file — with an AI assistant for hydrogeological context.

Subscribe Free 14-day demo

International availability — automatic retrieval of geological and piezometric data (BRGM, Hub'Eau) covers France. For a project located in another country, these parameters must be entered manually by the user; per-country automation of this retrieval is under development.

Features

From pumping test to DDT file

Theis + Dupuit-Thiem calculations

Theis solution (confined aquifer) and Dupuit-Thiem (unconfined aquifer), fitting against piezometric data, determination of transmissivity T and storage coefficient S.

Multi-layer Forchheimer/Dupuit

v15.87 multi-layer modelling: stacked aquifers, leakage between layers, drawdowns differentiated by level — for complex hydrogeological configurations.

Automatic IOTA classification

Automatic determination of the declaration/authorisation regime (headings 1.1.1.0 to 4.3.x) under Articles L.214-1 and R.214-1 of the French Environmental Code.

OpenStreetMap map + Lambert 93

Location of the abstraction point, radius of influence, isopiezes of the drawdown cone over a base map, Lambert 93 projection compliant with the DDT reference system.

27-page PDF file, ready for the DDT

Complete application file: calculation note, hydrogeological parameters, map, IOTA classification, water balance — ready to submit to the DDT.

AI assistant & geological database

13 pre-configured hydrogeological substrates, 15 departments with water balance, and the v15.87 AI assistant generating the hydrogeological context automatically.

Regulatory compliance

Regulatory framework

References applied

  • Articles L.214-1 and R.214-1 of the French Environmental Code — IOTA nomenclature, declaration and authorisation thresholds by abstraction category.
  • Theis solution (1935) — transient flow in a confined aquifer, constant-rate well.
  • Dupuit-Thiem — steady-state flow in an unconfined aquifer, radial drawdown equation.
  • Multi-layer Forchheimer / Dupuit — multi-aquifer flow with vertical leakage.
  • DDT prefectural orders — standard content of the water abstraction application file.
  • Lambert 93 projection (RGF93) — French national geographic reference system.
Pricing

Annual licence

New v15.87

Groundwater Drawdown

Multi-layer Forchheimer/Dupuit + AI assistant — annual licence

€1,800
incl. tax / year (€1,500 excl. tax)
  • 13 hydrogeological substrates
  • 15 departments + water balance
  • Automatic IOTA classification (R.214-1)
  • OpenStreetMap map + Lambert 93
  • 27-page PDF file ready for the DDT
  • v15.87 AI assistant
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Free 14-day demo — no credit card required

Drawdown v15.87 online — account access

The full application (entry of pumping and piezometer data, Theis/Dupuit-Thiem/multi-layer calculation, OpenStreetMap map, IOTA classification, 27-page PDF file) is accessible via the GMEP application after creating an account. No installation required. Activate your free 14-day demo for full access, no credit card required.

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