The WFD indicates that the presence of human induced intrusion in a groundwater body will result in it being at poor status. However, measuring the extent of salinity in Moldavian groundwater is complex, as some groundwater bodies have naturally elevated levels of dissolved solids due to the geochemistry of the aquifer. On the other hand, human impact due to groundwater abstraction is also obvious: groundwater levels are decreasing in major groundwater bodies.
Groundwater field survey was held in the Prut basin, Moldova on 3-5 September 2014. The main task of the survey was to find out whether increased salinity of production aquifers is caused by groundwater abstraction or is related to natural hydrochemical conditions.
15 groundwater samples were taken from the wells and results of chemical analyses will be compared with the initial groundwater quality during the drilling time. If groundwater salinity at the drilling and present time is the same, it means that groundwater has a natural salinity. If salinity has increased comparing with the drilling time, it means that groundwater abstraction is accelerating saline water intrusion and measures shall be taken for the improvement of groundwater status.
Some chemical parameters of sampled groundwater (pH, temperature, total dissolved solids and conductivity) were measured in the field after purging stagnant water from the pipe of the monitoring well. Other parameters (main cations and anions, total mineralisation, dry residue and some trace elements) will be analysed in the laboratory.
It is expected that analysis of the results of the field survey will allow to define the origin of saline water in the main productive aquifers of Moldova.
Photos© by Bernardas Paukstys and Victor Zhelyapov
- 2.4 Joint field surveys to cover the gaps
- Prut Basin