Présentations Colloques

    Oral Presentation
    Session 3.01: Groundwater data in the New Digital Age
    Dahlhaus Peter
    The Groundwater Interoperability Experiment 2- developing an international groundwater data exchange standard
    The groundwater interoperability experiment 2 was initiated by the Hydrology Domain Working Group of the Open Geospatial Consortium (OGC) to develop an international standard for the exchange groundwater data via the internet. The experiment focused on harmonising and extending previous initiatives such as the European Commission's INSPIRE geology hydrogeology package, the initial groundwater data interoperability standards developed by the Canadian Geological Survey (GroundWaterML1) and other models. The result is GroundWaterML2 a specification proposed by the OGC in 2016 as a standard for the transfer of groundwater data, including water wells, aquifers, flow, physical and chemical parameters and management. **The experiment was designed around five use-cases to test the commercial, technical, scientific, environmental and policy applications. The collaborators in the interoperability experiment were a dozen government and academic research organisations from North America, Europe and Australasia, who regularly convened through a series of more than 50 teleconferences and two face-to-face meetings over four years. **Three main steps were involved- 1) constructing a conceptual model using Unified Modeling Language (UML) representing the semantics of the groundwater domain+ 2) developing a logical model, as a GML schema that utilised the OGC suite of standards, and 3) encoding an extensible mark-up language (XML) schema. **The results of the experiment were positive, with seven of the participating organisations successfully mapping core components of their groundwater data to GroundWaterML2 and streaming it via OGC-compliant web services. It clearly demonstrated the seamless integration of groundwater data and information using international data exchange standards, federating all or parts of large groundwater databases with disparate schemas and stored on disparate systems. It heralds a new opportunity in groundwater data accessibility and the ability to further hydrogeological science through the new discoveries in federated international and multidisciplinary data sets. **


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