For the determination of the unsaturated soil hydraulic conductivity (CONCEICAO, 2014) by the instantaneous field profile method, a 10 [m.sup.2] plot inside the experimental area was used where tensiometers
were installed at the depths 0.20, 0.40 and 0.60 m.
was sealed and a syringe was used to apply a vacuum to simulate SWT.
In order to assess the response of the tensiometers
, Figure 3 displays the relationship between the suction pressure, Ps, versus the output voltage, [V.sub.t], for both tensiometers
([PT.sub.1] and [PT.sub.2]) obtained by two calibration methods.
Objective strength measurement with the tensiometer
showed significantly greater differences between the involved side and the opposite side in patients with tears compared with patients without tears.
The dynamics of wetting (e.g., dynamic contact angle variation vs contact line velocity) for receding motion is not the same as the dynamics of wetting for advancing motion for the same system of solid/liquid/vapor in the same experiment as obtained from tensiometer
where [[psi].sub.t,(upper or lower)] represents the upper or lower soil water pressure head within the core sample, and [DELTA]z is the vertical distance between tensiometers
. The [K.sub.r] was determined by fitting the evaporation test data to the van Genuchten soil moisture characteristic curves (Fig.
The interaction between the water profiles and the plant growing can be suggested by the evolution of the tensiometer
profiles (Figures 11 and 12).
Hence, it was decided to confirm the previous findings using a more accurate instrument for interfacial measurements: using the spinning drop tensiometer
Higher pressure levels, positive or negative and up to 1,300 kilopascals, are measured by soil suction tensiometers
, "another device which is not widely used for slope monitoring," says Hughes.
This system can be regulated by a switch tensiometer
with a flat base.
Dynamic surface tension was determined using a Kruss BP2 Tensiometer
which measures the rate at which bubbles are formed.