Accurately measuring groundwater flow velocity is important, particularly with the increased
emphasis on subsurface transport processes at hazardous waste sites. The colloidal
borescope provides a direct field measurement of the water velocity in a well. It is possible
to relate flow in a well bore to the surrounding porous media. By plotting the trajectory and
speed of a colloidal particle relative flow direction can be determined. The equipment for
doing this type of characterization will be discussed. Equipment will be demonstrated and
available for hands-on viewing.

Primary Author / Conference Presenter:
Jeff Popiel
Geotech Environmental Equipment, Inc.
Denver, Colorado, USA