Campbell TDR Manual descargar pdf (Pagina 12)

TDR Probes CS605, CS610, CS630, CS635, CS640, CS645

can affect the accuracy and resolution of water content measurements.

FIGURE 7-2 presents a series of waveforms when a solution with an electrical

conductivity of 1.0 dS m

-1

is added to a soil which has essentially no salt

present. FIGURE 7-3 shows data for solution with high electrical conductivity.

water content = 9.5%

water content = 25%

FIGURE 7-2. Waveforms collected in a sandy loam using CS610 probe

with RG8 connecting cable. Volumetric water content values are 10,

16,18, 21 and 25%. Solution electrical conductivity is 1.0 dS m

-1

water content = 18%

water content = 37%

FIGURE 7-3. Waveforms collected in a sandy loam using CS610 probe

with RG8 connecting cable. Volumetric water content values are 10,

18, 26, 30 and 37%. Solution electrical conductivity is 10.2 dS m

-1

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 27 28

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Campbell TDR Manual Pagina 12