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a measuring instrument for measuring high pressures

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Parameterisation of the model in terms of determining appropriate values of hydraulic conductivity coefficients [k.sub.x,y,z], the effective porosity [n.sub.eff], and total porosity coefficient [n.sub.tot] is adopted on the basis of the calibration procedures which rely on groundwater level at piezometers P1 (Figure 4).
Median concentrations in background piezometers (10 CFU/100 mL) were similar to those taken >15 m and beyond.
Every group of piezometers was installed in between 2 laterals and along them (500 meters).
Degree of consolidation based on settlement plates monitoring was found 68.7%, while based on pneumatic piezometers reading was 56.5%.
Paul Hughes, geotechnical science officer at Newcastle University responsible for setting up the instrumentation, says: "The most commonly used piezometers are vibrating wire piezometers.
CUTLINE: Army Corps of Engineers piezometers stick out of the Westville Dam.
Vibrating wire piezometers measure water levels in the adjoining river, as well as pressures underneath the levee structure, correcting the latter against parallel measurements of barometric pressure above.
Barometric pressure can change water-levels in piezometers within confined and deep unconfined aquifers.
2), 2 sets of shallow piezometers were installed in phalaris-based pasture, to monitor saturated soil conditions in the top 3-4 m of the soil.
Suction lysimeters and piezometers were installed in pairs 5 to 8 feet (150 to 240 centimeters) upgradient and downgradient of the disposal system.
To alleviate this concern, Shell proposed to undertake a comprehensive geotechnical evaluation of the soils beneath the levee, maximize the depth of the drilled installation beneath the levee, pre-install a series of directional "relief" wells to channel slurry and cuttings to the surface, and to monitor ground pressure during installation through a set of in situ piezometers.
The scope of the geotechnical investigation includes drilling boreholes with depths ranging from 40m to 80m, performing cone pentration tests (CPTs), excavating trial pits, installing piezometers and conducting packer permeability and pressuremeter tests.