References of "Wojda, Piotr"
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See detailAn object-oriented hydrogeological data model for groundwater projects
Wojda, Piotr; Brouyère, Serge ULg

in Environmental Modelling & Software (2013)

Geological and hydrogeological data are expensive to obtain in the field but are crucial for specific hydrogeological studies, from hydrogeological water balances to groundwater flow modelling and ... [more ▼]

Geological and hydrogeological data are expensive to obtain in the field but are crucial for specific hydrogeological studies, from hydrogeological water balances to groundwater flow modelling and contaminant transport, or for more integrated environmental investigations where groundwater plays a role. In this context, hydrogeological data are collected, transformed and exchanged at different scales, from local to international levels and between numerous institutions ranging from environmental consulting companies to the national and international environmental administrations. To guarantee that these exchanges are possible and meaningful, a clear structure and meta-information on applied hydrogeological data models is required. To make one step towards seamless management of groundwater projects, a new hydrogeological data model has been developed: Hg2O. It is described using object-oriented paradigms and it follows the recommendations of the International Organization for Standardization (ISO/TC211), the Open Geospatial Consortium (OGC), and the European Geospatial Information Working Group. Hydrogeological features are organized in packages of spatial feature datasets. The observations and measurements related to these features are organized in a seperate package. A particular focus is on specialized hydrogeological field experiments such as hydraulic and tracer tests. Two first implementations in the proprietary desktop ArcGIS environment and in the open-source web-based Web2GIS platform are presented, focusing on their respective standards support. [less ▲]

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See detailHydroCube: a new entity-relationship hydrogeological data model
Wojda, Piotr; Brouyère, Serge ULg; Derouane, Johan et al

in Hydrogeology Journal (2010), 18(8), 1953-1962

Managing, handling, and accessing hydrogeological information depend mainly on the applied hydrogeological data models, which differ between institutions and across countries. Growing interest in ... [more ▼]

Managing, handling, and accessing hydrogeological information depend mainly on the applied hydrogeological data models, which differ between institutions and across countries. Growing interest in hydrogeological information diffusion, combined with a need for information availability, require the convergence of hydrogeological data models to make hydrogeological information accessible to multiple users such as universities, administrations, water suppliers, and research organisations. Furthermore, because hydrogeological studies are complex, they require a large variety of high-quality hydrogeological data with appropriate metadata in clearly designed and coherent structures. A need therefore exist to develop and implement hydrogeological data models that cover, as much as possible, the full hydrogeological domain. To respond to these requirements, a new data model, called HydroCube, has been developed for the Walloon Region in Belgium. The HydroCube model presents an innovative holistic “project-based” approach, which covers a full set of hydrogeological concepts and features, allowing for effective hydrogeological project management. This approach enables to store data about the project localisation, hydrogeological equipment, related observations and measurements. In particular, the model focuses on specialized hydrogeological field experiments, such as pumping and tracer tests. This logical data model uses entity-relationship diagrams and it has been implemented in the MS Access environment as the HydroCube database. It has been additionally enriched with a fully functional user-interface. [less ▲]

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See detailGeospatial Information in Hydrogeological Studies
Wojda, Piotr; Brouyère, Serge ULg; Dassargues, Alain ULg

in Anderson, M. G. (Ed.) Encyclopedia of Hydrological Sciences (2010)

The purpose of this article is to make a review of hydrogeological information modeling objectives, techniques, and problems, and finally to propose a solution for data integration and transfer ... [more ▼]

The purpose of this article is to make a review of hydrogeological information modeling objectives, techniques, and problems, and finally to propose a solution for data integration and transfer. Hydrogeological data and information management is crucial for efficient integrated water resources administration, protection, and exploitation. To assure an effective management of groundwater resources, a close cooperation and information exchange between different actors at different levels is necessary. The information flux must be optimized between local producers and potential users of hydrogeological data: regional and national institutions, as well as international and transboundary analysts and managers. The paper format of representation and exchange of hydrogeological information has already been replaced by different digital forms. However, an enormous diversity in applied formats and representations makes hydrogeological information extremely difficult to transfer in an automatic way. If this transition is not effective, misinterpretations of hydrogeological data may appear. The proposed solution consists in creating a domain-specific standard for the hydrogeological information exchange, using recent geomatics advances, taking into consideration appropriate ISO/TC211 and Open Geospatial Consortium (OGC) geographic information standards. Such a new electronic carrier of hydrogeological information facilitates a dialogue between interested parties using web services and inbuilt exchange mechanisms, interdisciplinary collaboration, and international harmonization of environmental sciences. [less ▲]

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See detailDL 44 : Methodology and setup of the adopted groundwater vulnerability assessment method
Beaujean, Jean ULg; Wojda, Piotr; Gardin, Nicolas et al

Report (2008)

The objectives of this deliverable DL44 are to finalize the description of the global groundwater vulnerability assessment methodology, in particular : (1) to propose an extension of the concept of ... [more ▼]

The objectives of this deliverable DL44 are to finalize the description of the global groundwater vulnerability assessment methodology, in particular : (1) to propose an extension of the concept of sensitivity coefficient to vulnerability coefficient by introducing a ratio (distance to damage ratio) that reflects the “distance” between the current state of degradation of the water resource system and the “damaged state”,(2) To describe the methodology proposed to combine, through aggregation of spatiallydistributed indicators and multi criteria analysis, the different vulnerability coefficientsinto a single indicator of groundwater vulnerability for decision making, (3) To go further into the analysis and discussion of several key theoretical “case studies” for illustrating the way to setup the full methodology, from the DPSIR analysis to the expression of sensitivity and vulnerability coefficients. [less ▲]

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See detailConceptual model of hydrogeological information for a GIS-based decision support system of artificial recharge in semi-arid regions
Wojda, Piotr; Gogu, Constantin Radu; Brouyère, Serge ULg

in Cox, S.; Laxton, J. (Eds.) Quantitative Geology from multiple sources: Delivering geoscience information through open web standards (2006)

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See detailStress factors and associated physically based criteria and conclusions on the directions to be followed for developing a physically based vulnerability assessment method
Gardin, Nicolas; Wojda, Piotr; Brouyère, Serge ULg

Report (2005)

The specific results and outcomes of this deliverable is the proposition of a methodological framework for groundwater vulnerability assessment to any kind of stress factors, from a physically-based point ... [more ▼]

The specific results and outcomes of this deliverable is the proposition of a methodological framework for groundwater vulnerability assessment to any kind of stress factors, from a physically-based point of view. This methodology is in addition compatible with the well-known EU DPSIR framework for analysis from a physical and socio-economical perspective, environmental problems. From a more generic perspective, this deliverable provides a very convenient and rigorous framework for integrating the various research components developed within the project, into a decision support system, integrating environmental problems, data, processes and models, and socio-economical aspects. [less ▲]

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See detailCompilation of data collected and fed into a hydrogeological database in the Walloon Meuse catchment region
Batlle-Aguilar, Jordi; Wojda, Piotr; Brouyère, Serge ULg

Report (2005)

The objectives of this deliverable are to provide a general description of a hydrogeological database developed by HGULg, including specific adaptations made to meet the AQUATERRA project’s needs and to ... [more ▼]

The objectives of this deliverable are to provide a general description of a hydrogeological database developed by HGULg, including specific adaptations made to meet the AQUATERRA project’s needs and to provide a synthesis of available datasets for the selected test sites in the Meuse basin. First, a general description of the Walloon Meuse basin and the selected AQUATERRA test sites is provided. Then, the general concepts, the conceptual model and the developed interfaces of the HGULg hydrogeological database are presented. Finally, a summary of datasets available for the selected test sites is provided. [less ▲]

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See detailCompilation of data collected and fed into a hydrogeological database in the Walloon Meuse catchment region
Batlle-Aguilar, Jordi; Wojda, Piotr; Brouyère, Serge ULg

Report (2005)

Based on a first inventory of available case studies, test sites have been selected in the Walloon part of the Meuse Basin in Belgium. These sites meet the requirements and objectives of the researches ... [more ▼]

Based on a first inventory of available case studies, test sites have been selected in the Walloon part of the Meuse Basin in Belgium. These sites meet the requirements and objectives of the researches performed by different partners in AquaTerra. Available information and datasets have been collected for these sites and complementary investigations and experiments have been organized. Existing data and recently collected data have been compiled into a hydrogeological database developed by HGULg for the Walloon region and adapted to the specificities and needs of the AquaTerra project. The deliverable provides a general description of the hydrogeological database developed by HGULg: the conceptual model, specific adaptations performed for the AquaTerra project and interfaces for encoding, querying and exporting hydrogeological information stored in the database. A synthesis of datasets available in the HGULg Hydrogeological Database for the selected test sites in the Meuse basin is also provided. [less ▲]

Detailed reference viewed: 21 (1 ULg)