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Charles Dowding <c-dowding@nwu.edu> writes One of my former colleagues here at the Northwestern's Geotechnical Program, Joe Feldkamp, built a very sensitive heat probe that could determine ground water gradients from a single borehole. The system measured the difference in heat energy required to balance temperature at the hole's circumference. Given the small groundwater gradients, the system obviously was VERY sensitive. I've lost track of Joe; however he might be reached through his alma mater, the Purdue Soil Science Department. At 06:41 PM 11/17/1998 GMT, you wrote: >NOTE: To get off this list, send email to majordomo@aqua.ccwr.ac.za >with the body of the message containing the line: >unsubscribe sowacs > >Dear all, > > >My Ph.D. project concerns the heat transfer between buildings and the ground, >more particularly, >the influence of the coupling between heat and moisture transfer in this >process. > >One aspect of this project is the performance of scale model measurements, in >which I would like >to observe the thermal and hygric behaviour of the ground domain around a >foundation structure. >For the in situ measurement of the thermal properties - and their variation >- I am planning to use >heat dissipation probes. The results of such measurements allow the >determination of the moisture >content of the soil as well. > >I was wondering though, if this particular measurement technique - the heat >dissipation method - >is competitive with other soil moisture measuring techniques. How accurate >is such a heat probe >measurement ? If anyone has any practical experience with such measuring >devices, and may be >able to inform me about this topic, please do. > > >Thank you, > > >hans > ================================================================= >Hans Janssen IWT Research Fellow >Laboratory for Building Physics >Celestijnenlaan 131, 3001 Heverlee, Belgium >Tel: +16 321767 Fax: +16 321980 >http://www.bwk.kuleuven.ac.be/bwf >E-mail: Hans.Janssen@bwk.kuleuven.ac.be >================================================================= > > > > Charles H Dowding (847) 491 4338 Professor of Civil Engineering (847) 491 4011 FAX Northwestern University http://civil.nwu.edu/people/dowding Evanston IL 60208 c-dowding@nwu.edu