1. Kestutis Kadunas & Juozas Mockevicius Geological Survey of Lithuania
Groundwater monitoring system in Lithuania: does it satisfy WFD requirements?
monitoridgas
Kestutis Kadunas & Juozas Mockevicius
Geological Survey of Lithuania

2. Main groundwater management units (GWB) (problematic area's)

3. Principle for delineation
Hydro-dynamically connected systems of aquifers (national GW bodies):
water abstraction;
geological boundaries (conditional)
geochemical boundaries (saline water contour).
GWB use of which can affect surface water resources or other ecosystems

4. Schematic diagram of GWB

5. Hierarchy of groundwater monitoring
National monitoring = Surveillance
Municipality level (fill space between national and economic entities levels, more information systems)
Economic entities levels (enterprises)=operational
Water uses
Potential polluters

6. Groundwater monitoring: interface between national and local

7. Structure of the Groundwater Monitoring in Lithuania

8. Density of monitoring network
GW body
No. of wells
Total Surveillance Operational
Density
Well/100km2
D3+2
315
93a
182/40b
1.8
P2+D3
207 60
121/26
2.7 D3
128 16
85/27
2.5
Cz-Mz
286 62
186/38
3.4
Q1+Q2
1026 53
887/86
4.0
a = national
b potential polluters/ water users

9. Periodicity Surveillance monitoring Qualitative status
1-2 times/year (main ions)
1 time/2-3 years (specific compounds)
Quantitative status (level)
times/month
Operational monitoring
Qualitative status (water users & potential polluters)
2-4 times/year (main ions, specific compounds)
1 time/2-3 years
Quantitative status
5-10 times/month (level water users)
4 times/year (water abstraction)
2-4 times/year (potential polluters)

10. Presentation of the results
Qualitative status
Quantitative status