Glacial lake with floating ice, steep mountain ridges behind.

Hydrogeological and environmental geology engineering services

Engineering answers.
Below the surface and above it.

Well design and water-rights permitting, wellfield protection risk assessment, environmental site assessment, monitoring, groundwater flow modelling and drone-based geodata — with transparent documentation, coordinated by a single office.

Discuss a project Areas of expertise
Photo: Unsplash
6interlinked
disciplines
6Chamber expert and
design licences
3Dgroundwater flow
modelling
GISnational-grid-ready
geodata deliverables

Areas of expertise

From water demand to the engineering decision.

Permit documentation is a joint reading of the site's history, the geological and hydrogeological system, the intended use and the regulatory setting.

Every assignment starts with a targeted data request and a preliminary screening. This shows from the outset which field measurements, models, annexes or consultations will be needed.

01Wellfield protection risksite-specific assessment report 02Well design, water-rights planning and permittingwater sourcing · documentation · drilling 03Groundwater flow modellingwell interference · impact assessment 04Environmental site assessmentland-use history · contamination risk 05Monitoring and reportingmeasurement programme · trends · regulatory submission 06Drone survey and geodataorthophoto · surface model · GIS
Outflow of a large, crystal-clear karst spring in a forest setting. 01
Photo: Kbh3rd / Wikimedia Commons · CC BY 3.0

Wellfield protection

Building inside a wellfield protection zone — with quantified risk.

Site-specific risk assessment documentation for a new building, technology, utility or other activity where the development affects a designated or provisionally delineated wellfield protection zone.

01Exposureprotection zone, decision, site
02Pathwaysoil, water, operating state
03Risklikelihood × consequence

Scope of assessment

  • geological, hydrogeological and groundwater conditions
  • water supply, wastewater and stormwater management
  • construction, operation, decommissioning and emergency scenarios

Decision-ready outputs

  • risk matrix with justification
  • engineering safeguards and preventive measures
  • monitoring and operating conditions

The assessment does more than classify: it defines the design, construction and operating conditions under which any threat to the wellfield can be ruled out.

More about wellfield protection risk assessment
Water-well drilling rig in operation on a floodlit site. 02
Photo: Rahul Bokhare / Pexels

Well design and permitting

A well from water demand to licensed operation.

Water-rights construction, operating and retrospective permit documentation for groundwater production and monitoring wells, water-sourcing expert opinions, and professional coordination of the drilling works.

When is it needed?

  • before a new production or monitoring well
  • for the operating permit of an existing well
  • for wells built without a permit or differently from it
  • to substantiate demand, aquifer and siting

Backbone of the documentation

  • hydrogeology and wellfield-zone exposure
  • well and mechanical design
  • site plan, national-grid coordinates, water demand
  • test pumping, testing and monitoring regime
Water-sourcing expert opinion Permit design As-built documentation

Construction: drilling is carried out by a duly licensed subcontractor on the basis of the final water-rights construction permit and the approved design.

More about well design and permitting
Braided glacial rivers and alluvial fans seen from the air. 03
Photo: Unsplash

Groundwater flow modelling

Wells do not operate in isolation.

A numerical 3D groundwater flow model to quantify the interference, drawdown cones and water balance of existing and planned wells and their impact on protected water uses.

  1. 01
    Conceptual model

    layers, water bodies, boundary conditions, recharge and abstractions

  2. 02
    Calibration and scenarios

    measured heads, existing and planned states, steady-state and, where needed, transient operation

  3. 03
    Interpretable results

    drawdown map, well interference, water balance, sensitivity and engineering conclusions

Groundwater flow model Maps and cross-sections Impact assessment report
Regulatory and methodological basis

Ministerial Decree 30/2008 (XII. 31.) KvVM interference assessment under Section 5(3), Government Decree 147/2010 (IV. 29.).

Modelling principle: a prediction is only as good as its data. The report therefore sets out the assumptions, the calibration, the uncertainty and the limits of the model's applicability.

More about groundwater flow modelling
Layered rock core samples in ordered core boxes. 04

Pre-investment environmental site assessment

Before the site's risk becomes part of the investment.

Preliminary assessment of the environmental condition of industrial, logistics and brownfield properties before purchase, sale, financing, redevelopment or change of use. The aim is early identification of potential contamination liability and a proportionate definition of the next investigation step. In international terms: Phase I and Phase II Environmental Site Assessment, i.e. environmental due diligence.

01Site historypast use, records, walkover
02Pathwaysoil, groundwater, utilities and surface
03Decisionrisk, sampling, next step

When is it especially warranted?

  • before the sale of an industrial or logistics property
  • for brownfield redevelopment and change of use
  • where fuels, workshops or chemicals were used in the past
  • for a lender's or investor's risk decision

Scope of assessment

  • historical and current land use, site walkover
  • potential source–pathway–receptor linkages
  • geological and hydrogeological sensitivity
  • targeted soil and water sampling proposal, where required
Risk site plan Conceptual site model Decision report

Why now? The Soil Monitoring and Resilience Directive (EU) 2025/2360 entered into force in December 2025 and requires the risk-based identification, investigation and registration of potentially contaminated sites. Knowing a site's environmental condition will therefore become a compliance matter as well as a transaction matter in the coming years.

Proportionate investigation: a preliminary assessment is not a regulatory site investigation in itself. Where the risk warrants it, a targeted sampling programme and a separately scoped detailed investigation follow; sampling and laboratory analysis are carried out with an accredited partner.

More about environmental site assessment
Sampling equipment set up at a groundwater monitoring well in a mountain-ringed meadow. 05

Groundwater and geological medium monitoring

Traceable condition from measured data, and a report you can use.

Design of monitoring networks and measurement programmes, professional review and time-series evaluation of field and laboratory data, and preparation of annual, semi-annual or ad hoc regulatory reports.

  1. 01
    Monitoring plan

    objective, wells, determinands, frequency, sampling and data-transfer regime

  2. 02
    Measurement and data review

    water levels, water quality, field records, laboratory results and quality assurance

  3. 03
    Trends and reporting

    comparison with limit values, maps, time series, conclusions and recommended actions

Recurring tasks

  • review of an existing monitoring network
  • coordination of sampling and accredited laboratories
  • data structured for the national FAVI groundwater register

Decision-support evaluation

  • water-level and concentration trends
  • comparison with threshold and limit values
  • need for network changes or intervention
Monitoring plan Trend maps and charts Regulatory report

Why now? Tightening the lists of water pollutants, Directive (EU) 2026/805 entered into force on 11 May 2026, with a national transposition deadline of 22 December 2027. New substance groups — including PFAS compounds and pharmaceutical residues — come under closer scrutiny, which may require existing monitoring programmes to be reviewed.

Clear division of roles: sampling and analysis are performed by duly accredited partners; GEO-PSY brings together the programme, data quality, geological–hydrogeological interpretation and documentation.

More about monitoring and reporting
Own drone image of a waterworks site's woodland belt and the surrounding farmland. 06
Own survey material · waterworks site

Drone survey and photogrammetry

Decision-ready geodata, from above.

The flight is where data collection begins. Georeferenced imagery is turned into a documented CAD/GIS data package that can be used directly for design, condition assessment and repeat monitoring.

Positioning Not stand-alone drone photography, but a decision-ready engineering data package.

The survey ties directly into the geological–hydrogeological tasks and the downstream design process.

  1. Entry package

    Site flight + georeferenced orthophoto + brief technical handover.

  2. Design package

    Ground control points + orthophoto + CAD/GIS base map + DTM/DSM + metadata.

  3. Monitoring package

    Identical flight plan + time-stamped change detection + engineering interpretation.

Process

  • flight planning and airspace check
  • field data capture and control points
  • photogrammetry, georeferencing and QA

Delivery formats

  • GeoTIFF, KML/KMZ, SHP/GPKG
  • LAS/LAZ, XYZ, DXF and OBJ
  • processing and quality-control report

Airspace and image rights: every flight is preceded by operator registration, an airspace check and, where required, an ad hoc airspace request through the MyDroneSpace system. Identifiable persons and imagery of private property are handled in line with Section 2:48 of the Civil Code (right to one's image) and data-protection rules; on request, uninvolved persons and number plates are anonymised in the delivered material.

Resolution and accuracy depend on flight altitude, camera, overlap, GNSS/control points, terrain and weather; these are fixed in the quotation in advance. The product does not replace the certified work of a licensed land surveyor where the law requires it.

More about drone survey and geodata

One project, clear steps

From the question to deliverable documentation.

Each stage ends with a verifiable result — so progress, missing data and the next decision are always clear.

  1. 01

    Kick-off and data list

    Review of the site, objective, history, regulatory records and available design material.

    Output: scope definition
  2. 02

    Field and data

    Data acquisition, site walkover, measurement or flight — only to the depth required.

    Output: verified data basis
  3. 03

    Analysis and design

    Hydrogeological evaluation, sizing, risk calculation or numerical modelling.

    Output: engineering solution
  4. 04

    Documentation and consultation

    Transparent annexes, maps and conclusions; support in technical consultations.

    Output: submission-ready package

Credentials

Licensed to see the whole task through.

Expert and design activities registered with the Hungarian Chamber of Engineers.

Our work is carried out under Chamber of Engineers licences.
SZKV-1.3.

Water and geological medium protection

Environmental expert specialisation.

SZVV-3.9.

Water exploration, well drilling, hydrogeology, wellfield protection

Water management expert specialisation.

VZ-VG

Other water management design

Design licence.

VZ-TEL

Municipal water utility design

Design licence.

VZ-TER

Regional water management structures

Design licence.

GT

Geotechnical design

Design licence.

Official sources

Legislation and methodological references.

Links lead directly to the Hungarian National Legislation Database, EUR-Lex, EASA and MyDroneSpace. Verified: 11 August 2026. Hungarian legislation is available in Hungarian only.

01 Wellfield protection and risk assessment
02 Well design, water-rights planning and permitting
03 Groundwater flow modelling and well interference
04 Environmental site assessment
05 Monitoring and regulatory reporting
06 Drone operations and surveying
Important:

This website is for information only. The exact procedure, competent authority and documentation content must always be determined from the site, the purpose and technical characteristics of the water facility, the water-resource protection classification, the protection-zone decision and the requirements of the acting authority.

Contact

Let's start the project with the right question.

Tell us the site, the planned activity and what background material you have. As a first step we define the data and tasks required.

Phone +36 20 264 5913 E-mail geo-psy@outlook.com
Area of operation Budapest, Pest County
and assignments across Hungary and the region
Short project brief Your enquiry is transmitted securely.

You will receive an immediate confirmation on successful submission.