Development of Groundwater Monitoring System

1. Development of Groundwater Monitoring System Norwegian/EEA Financial Mechanism Estonia Conference Tallinn, Estonia, 17 november 2004 by Jan Erik Sørlie Norwegian Geotechnical Institute

2. Board of Directors Managing Director Deputy Managing Director Technical Directors Centre of Excellence International Centre for Geohazards • Administration/Finances • Personel • Information • Quality Assurance • ICT NGI Inc. Houston, Texas, USA Onshore GeotechnicalEngineering Soil Investigations Foundations Geohazards Pipelines Geo-laboratory andModel Testing Avalanches Engineering Geology and Rock Mechanics Mapping Sub-marine Slides Laboratory Testing SoilContamination Environmental Laboratory RiskAssessment Hydrogeology Groundwater Monitoring Remediation Methods Geomechanics Geodynamics and Vibrations Numerical Analysis and Model Development Reservoir Mechanics Risk Analyses Instrumen-tation ConditionMonitoring Subsea Technology Geophysics Soil Investigations Foundations Landslides Arctic Geo- technology Dams Offshore Geotechnnical Engineering Environmental Engineering Geomechanics Monitoring and Geophysics Engineering Geology and Avalanches

3. Risk based environmental site assessment of waste sites from the oil shale industry Completed by the project group: Norwegian Geotechnical Institute Norwegian Geological Survey Institute of Geology at Tallinn University of Technology Geological Survey of Estonia National Institute of Chemical Physics and Biophysics Financed by The Norwegian Government, under the Intergration Program for EU-Candidate countries

4. Groundwater Monitoring in Estonia • A wise choice • Examples of poor groundwater monitoring (USA, Denmark, India) • Groundwater resources, very important for EstoniaDrinking water, Industrial- and irrigation supply • Trends, climatic changes, dry/water logging

5. Groundwater Monitoring • Status of national network of groundwater monitoring? • To meet EU Water directive of 2000: • Rehabilitation, replacement and new sites • Establish standard specifications for drilling, installations sampling, etc. (Cost effective – Long term) • Location of sites must reflect: • Monitoring of possible contaminants/spreading (both from industry and agricultural activities) • Possible salt water intrusion • Naturally based contamination • Recharging, drainage, and mining of groundwater • Establish quality threshold values for groundwater at risk

6. Groundwater Monitoring Implementation EU directive • Groundwater status – characterization • Monitoring of groundwater quantitative status(level, density, frequency) • Groundwater chemical status(concentration of contaminants, antropogenic and natural) • Monitoring of groundwater chemical status(overview of chemical status and long term antropogenically induced trends) • Monitoring of transboundary groundwater bodies PS: Additional relevant info on groundwater monitoring is prepared by International Association of Hydrogeologists (IAH)

7. Interpretation & Presentation of Groundwater Status • River Basin Management Plan: • Groundwater bodies, quantitative and chemical status • Groundwater model (3D) of Estonia: • Upgrade technically • Supplement with new monitoring data • Tool for predicting long term trends on quantity and quality