Installation of Sub-sea Piezometers in the Neretva Delta
19/03/2026
As part of the SWAMrisk project, the project team has successfully completed the installation of sub-sea piezometers in the Neretva delta, further strengthening the monitoring infrastructure for groundwater and surface water systems.
The piezometers were installed at depths ranging from 10 to 35 metres, with the deepest location corresponding to a confined aquifer strongly influenced by marine conditions - in terms of water levels, salinity, and temperature. The system includes inner and outer high-frequency probes, enabling precise, real-time measurements.
In addition, existing piezometers have been upgraded with multi-level probes, telemetry systems, and autonomous power supply, allowing continuous data transmission. The monitored parameters include:
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pH
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electrical conductivity (EC)
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temperature
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salinity
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density
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hydraulic head
The investment also involves water column profiling and investigation of deep stratigraphic units, aiming to better understand the interaction between freshwater and seawater. Initial findings confirm a strong tidal influence on groundwater dynamics and highlight the complexity of transition zones.
Furthermore, radon and thoron measurements in water have been introduced as an innovative method for detecting groundwater flows, and an ADCP system has been installed to monitor flow dynamics in real time.
This infrastructure enables:
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continuous and reliable water monitoring
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improved understanding of salinization processes
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stronger scientific basis for water resource management
The SWAMrisk project will continue with field campaigns and analyses to support the development of sustainable solutions for water management in sensitive coastal environments.
Stay with us! More exciting results coming soon.
