SEPTEMBER 30, 2014
Transcend Engineering Installs PRISMS Soil Moisture Sensors at Department of Energy (DOE) Research Field Station
Transcend Engineering deployed second generation prototypes of its PRISMS soil moisture sensing technology in two boreholes at the U.S. DOE environmental field research station in Rifle, CO, on the site of a former uranium tailings operation along the Colorado River corridor. Counting first generation PRISMS sensors installed in 2013, the new installations bring the total number of PRISMS sensors at the site to 11.
PRISMS Technology will provide long-term time series monitoring of spatially resolved profiles in the entire vadose zone. The 2nd generation wavguide design was further optimized for greater sensitivity to the surrounding soil using parametric modeling. Three new waveguides, installed August 25, are each over 4 meters long and span from the ground surface to below the seasonal low water table, so they will be able to monitor water table level as well as unsaturated moisture content.
PRISMS applies advances in the processing of Time Domain Reflectometry (TDR) data obtained from a specially designed transmission line embedded in the soil. Transcend Engineering and collaborator Lawrence Berkeley Laboratory (LBL) have been monitoring first generation PRISMS sensors in four other boreholes at the Rifle site since August 2013. A deployment image gallery and animations showing data collected during Phase 1 development of the Profile Resolving In-Situ Soil Moisture Sensor (PRISMS) are available for viewing at www.transcendengineering.com/prisms.html
Transcend Engineering has received funding to develop PRISMS from the US Department of Energy's Office of Science through a Small Business Innovation Research (SBIR) grant. Work under the Phase 2 SBIR award started in April 2014.
The U.S. Department of Energy’s Rifle, Colorado (USA) field station seeks to quantify coupled microbiological, geochemical, and hydrological processes that control elemental cycling within floodplain deposits along the Colorado River corridor.
Transcend Engineering develops innovations in sensing and instrumentation for geotechnical, oceanographic, atmospheric, transportation, and security uses. They are located in Bethel, Vermont.