Re: Watermark or gypsum blocks?

[JMH@inel.gov]

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JMH@inel.gov writes:

Your choice of sensors should be determined by the range of water
potentials you wish to do your measurements over, data logging requirements
and the accuracy required.  Each type of sensor has it effective range and
accuracy over that range.   You should look at the literature on the
various sensors.   A fairly good general reference (but older) is Ground
Water Monitoring Technology by Robert D. Morrison, and published by TIMCO
MFG. INC, 1983 or the EPA document Subsurface Characterization and
Monitoring Techniques, A DESK REFERENCE GUIDE, Vol II. The vadose zone,
field screening and analytical methods  appendicies C and D ,
EPA/625/R-93/003b, 1993.