Because water seeks its own level, the pressure measured at the specific depth of the instrument reflects the combined effects of the water column above it and the pore pressure within the soil matrix. This filter pack is a critical component, as it allows water to reach the sensor while preventing fine soil particles from clogging the porous tip.
Piezometer Definition Long Term Reliability Factors
While generally more cost-effective, it can be susceptible to signal drift over time and requires careful calibration to ensure data integrity. Tension in the wire changes with pressure, allowing for highly accurate and repeatable readings.
Bubble formation in the water-filled tubing or corrosion of the sensor components can alter calibration. If the filter pack is not installed correctly, the device may read artificially low pressures due to partial blockage.
Piezometer Definition Long Term Reliability Factors
By plotting hydraulic head over time and depth, professionals can generate contour maps of pressure and identify flow directions within the subsurface. A piezometer is a scientific instrument designed to measure fluid pressure within a confined system, most commonly groundwater or soil saturation.
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