Hydrogeological expertise

Groundwater vulnerability mapping, diagnostic investigations

In the last decade our company has been involved in diagnostic investigations of nearly 40 producing vulnerable water resources (KEOP 2.2.3/A, KEOP 2.2.3/C, INTERREG).

During the execution of the projects we undertake the enlisted tasks:

Water quality investigations

We complete in-situ chemical measurements and hydrogeological evaluation of water and soil samples. Our customers seek us for examination of contaminants, documentation of water chemistry conditions, chemical characterization and hydrogeological interpretation of stable isotopes.

We undertake in-situ determination of the chemical composition of springs, surface water flows, lakes, drains etc. with ion–selective electrodes. The following components can be measured: pH, Eh [μS/cm], T [°C], Cl-, NH4+, Na2+, K+, NO3-.

Design and permitting of irrigation-, monitoring-, industrial water wells and geothermal heating systems’ well

Our company has been involved in the designing and permitting of irrigation-, monitoring-, industrial water wells since its foundation, therefore we have a number of references in acquiring installation-, operation- and subsistence permits. Recently we have commands for design and permitting of operation and injection wells of geothermal heat systems too. The company undertakes liaison and negotiation with the Authorities, and professional consultation during the permission process. We carry out well reviews and geophysical investigations that may arise when acquiring well permits. In case the wells to be installed are in an environment protection area or the production raise environmental concern, we prepare the environmental impact assessment. Preparation of hydrogeological log-books required for the licensing is done by our experienced team of geologists.

Long–term (online/offline) monitoring

Our company offers the installation and operation of water level measuring devices in monitoring wells and in surface water flows and also evaluation and interpretation of tests in monitoring and production wells. Our DATAQUA and CTD-DIVER instruments can measure water level, temperature, electric conductivity and air pressure. They have GPRS/GSM connection, therefore the measurements can be done online.

Interference assessment

Normally, measurement and interpretation of pumping tests are performed in production and observation wells. The output parameters are very important for hydrogeological modeling. We calculate the value of hydraulic conductivity, specific storage and yield based on field measurements and special software (Dupuit–Thiem, Altovszkij, Theis, Cooper–Jacob, Theis-–Jacob, Neumann etc.).

Hydrodynamic, transport and heat transport modeling

We make hydrodynamic models using up–to–date software such as FEFLOW and VISUAL MODFLOW FLEX. Models are prepared for steady state and transient cases in local or regional scale. We carry out models porous and fractured media and in bank–filtered production wells. Design and preparation of environmental impact assessment and action plans are made based on 3D transport modeling.

We construct 3D hydrodynamic models of thermal water aquifers. The largest model we have built is the regional heat transport and hydrodynamic model of thermal water resources of Bihar–Bihor County (Hungary and Romania).

Protection plan of vulnerable water resource

Protection plan of vulnerable water resources contains the decision of internal, external, hydrogeological "A”, “B” protective zones, and their restrictions. We construct a GIS database from the information gained during the project and the precise location of the protective zones.

Tracer tests in fractured karstic areas

The connection between recharge and discharge areas is generally quite complex in karstic media. In karstic systems, the most effective method for revealing the groundwater flow paths is Tracer test. Our device, GGUN-FL, with the aid of a field laboratory can not only measure the turbidity, but also detect three, up to five tracers simultaneously.

Thermal water exploration

Our company works on the preparation of projects related to the following issues: balneological and energetic use of thermal water as well as prediction of safe and long–term production of thermal water resources.