Summary
    OUAIP (OUtil d'Aide à l'Interprétation des Pompages) software is used to interpret pumping tests, whether it involves pumping in stages (well tests) or pumping over a long period (groundwater tests). It can also be used to simulate the impact of pumping on an aquifer.
    The OUAIP software, developed by BRGM and made available free of charge on its website, is designed to improve the interpretation of pumping tests and, in particular, the reliability of the estimated parameters characteristic of aquifers.

    The OUAIP software, developed by BRGM and made available free of charge on its website, is designed to improve the interpretation of pumping tests and, in particular, the reliability of the estimated parameters characteristic of aquifers.

    © BRGM

    Test pumping is an essential phase in the study of aquifers, and is usually indispensable when quantitative data on water resources are required.

    It involves a hydraulic test of the aquifer. It is used by hydrogeologists to determine the flow rates of operational pumping installations and estimate the parameters governing underground water flows. Specifically, pumping test interpretations are used to quantify the specific parameters of a pumping installation and the characteristic hydrodynamic parameters of an aquifer.

    OUAIP, developed by BRGM, is a free software package dedicated to the interpretation and simulation of pumping tests in hydrogeology. It aims to improve the interpretation of pumping tests and, in particular, the reliability of estimates of characteristic aquifer parameters.

    OUAIP offers a range of analytical solutions (for porous or fissured ground, captive or semi-captive aquifers, etc.) taking into account perturbing effects (well effects, boundary effects, capacity effects, etc.).

    Practical information 

    • Operating system: Windows Vista / Windows 7 / 8 / 10 / 11
    • Programming language: VB.NET with .NET Framework 4.6
    • Languages: French, English, Spanish (users can translate the interface into other languages)

    What's new in version 3.1?

    September 2025

    OUAIP v3.1 is a mixed hydrogeology and geothermal version with the addition of the diagnosis of the derivatives of the drawdown (or of the pressure) taking into account the variations of the pumping flow (deconvolution of the flows) for interpretation of the pumping tests. OUAIP is now available in Spanish in addition to French and English.

    A new user manual (RP-72426-FR) is now available, with examples of derivative analyses and a description of the geothermal module.

    A new analytical module simulating the behaviour of free aquifers (Neuman solution) has been added.

    The interface has been improved to make it user-friendly (management/conversion of units, graph management, addition of "dark mode", derivative module, filtering of points using the eraser tool, etc.).

    Documentation

    Contact

    For more information contact us at ouaip@brgm.fr.

    Do you need training in interpreting and making the most of pumping test data? Follow this link.

    Trial pumping in a borehole, Jordan
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