In 2005 the project "Evaluation of groundwater conform WFD requirements for groundwater management in Slovakia" (MAT03/SK/9/3) was finished. This project was carried out with a consortium of Royal Haskoning, RIZA and SHMU.

As part of the project the groundwaterbodies were delineated and a characterization was carried out for the first reporting to Brussels. We also developed guidelines for the further characterization and monitoring according to the WFD.

In the current project numerical models will be set up with TRIWACO as a tool in the process of groundwater evaluation. The main purpose is to establish a conceptual model of the hydrogeological systems. Once the systems are defined, the groundwater flow regime can be quantified. The second purpose is the use of models in setting up a monitoring strategy and definition of measures as required by the Water Framework Directive.

A consortium of Royal Haskoning, RIVM, Acacia Institute and our local partner CW Consulting will train the hydrologists of the SHMU in setting up and application of groundwater models.

The Technical Assistance Information Exchange office of the European Commission's Joint Research Centre continues with the seminar Groundwater Modelling and the Water Framework Directive in co-operation with local parties. After Czech Republic, Slovakia and Bulagaria this year a seminar is held in Poland.

The seminar is held from 26th of June till 29th of June in Warslaw. It is organised in close co-operation with the Polish Geological Institute, Warsaw, Poland.

The Technical Assistance Information Exchange office of the European Commission's Joint Research Centre organised a seminar 'Groundwater Modelling (INFRA 10822)' in co-operation with the Faculty of Civil Engineering of the Slovak University of Technology. The seminar was held at the University's Education Centre in Kocovce on 8 - 12 december 2004.

triwaco played a central role in the seminar in which various aspects of groundwater modelling were discussed. Casper van de Watering (CW Consulting Bratislava) was the chairman. Other participants included experts from the Netherlands and geohydrologists from various Slovak agencies concerned with watermanagement and from the Technical university in Bratislava. During the seminar all participants used triwaco for practical illustration of the Good Modelling practice implied by triwaco's dataset structure and to explore the problems discussed in the seminar. The topics included parameter allocation, transient flow and contaminant transport.
The seminar underlined the acceptance of triwaco for groundwater modelling in Slovakia.

triwaco offers an integrated modelling environment for unsaturated, saturated, drainage/infiltration and surface water flow. The modular and open structure assures easy linkage between different models, like SOBEK or ArcView/GIS.

triwaco users enjoy a working environment which allows them to define hydrological situations in physical terms while they can rely on a proper translation of this conceptual model into mathmatics of a numerical engine. For groundwater that is TRIWACO-FLAIRS (finite element method) or MODFLOW (finite difference method).

Watercourses, faults and tubes may be defined by line-elements in multiple layers. In combination with the TOPSYSTEM can simulate virtually any water system. On a regional scale from a delta to karstic terrain and on a local scale from complex drainage systems to entire artificial recharge & recovery schemes.

triwaco offers an open structure for easy linkage between different models within or outside the triwaco working environment . For example the interaction between groundwater and individual watercourses (defined as line elements) can easily be linked to the branches of a hydraulic surface water model. This link is defined conceptually and will work for any numerical discretization.

The package can easily be expanded with endless possibilities for post-processing. Additional modules are available for solute transport (o.a. MT3D), subsidence, eco-hydrological effect forecasting and much more.

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