HR: 1340h
AN: H53E-1454    [Abstracts]
TI: Tomography of underground target elements using CWR
AU: * Serrano, M F
EM: serranoguzman2000@yahoo.com.mx
AF: Universidad Pontificia bolivariana, Bucaramanga | Km. 7 Vía a Piedecuesta, Edificio D Of. 307 Bucaramanga, COLOMBIA, Bucaramanga, COL 40531, Colombia
AU: Padilla, I Y
EM: padillai@uprm.edu
AF: University of Puerto Rico Mayaguez Campus, Km 1.8 Road 108, Mayaguez, PR 00681, Colombia
AU: Rodriguez, R
EM: rarsolis@ieee.org
AF: University of Puerto Rico Mayaguez Campus, Km 1.8 Road 108, Mayaguez, PR 00681, Colombia
AB: Severe environmental, health, and national security impacts posed by underground contamination and buried explosive devices have created the need to develop cost effective technology to detect and monitor underground target elements (UTE). Cross well radar (CWR) has been applied for detection of target objects that exhibit significant contrast of dielectric properties in soils. Its application for detection of single or distributed elements in heterogeneous underground conditions has yet to be developed. This research addresses the development of a physics-based tomographic model for in situ soil characterization and detection and imaging of UTEs in unsaturated soils by CWR. Experimental work involves transmitting and receiving electromagnetic (EM) signals by an array of antennas in a 2D SoilBED subject to variable water content conditions. The EM response is analyzed using Visual Basic and Matlab Codes based on obtain the S-parameters generated by the network analyzer, estimate the dielectrical permittivities, and create a tomogram of the soil and its characteristics. These tomograms are generated using simultaneous algebraic reconstruction techniques (SART), with enhance convergence parameters. Embedded UTEs are distinguished through comparative simulations of tomographic dielectric properties. Preliminary results indicate that good tomograms can be generated using an array of 5 antennas on each side of a 30 cm x 30 cm two-dimensional setup, and an array of 17 antennas for a 90 cm 90 cm two-dimensional setup.
DE: 1009 Geochemical modeling (3610, 8410)
DE: 1828 Groundwater hydraulics
DE: 1832 Groundwater transport
DE: 1847 Modeling
DE: 1866 Soil moisture
SC: Hydrology [H]
MN: 2007 Fall Meeting