My research activities/interests have ranged from Aeromagnetic surveying and Induced Polarization applied to mineral exploration problems in the SW;  geophysical prospecting in equatorial Brazil;  well logging in water supply / monitor wells in Brazil and Michigan;  resistivity and S.P. prospecting for potable ground water in the Amazon delta;  the first underground I.P. surveying (Homestake Gold Mine);  GPR for structural mapping in tropical Brazil;  GPR for archaeology in Brazil, Mexico, and Michigan;  development of the first underwater GPR antenna and subsequent use for sand thickness mapping in L. Michigan and UXO detection in L. Erie; development of the conductive model for LNAPL contaminant plumes;  use of azimuthal resistivity to characterize primary depositional fabrics of clastic sediments;   and application of multiple methods for near-surface investigations of environmental sites.

Educational Background

Ph.D - University of Arizona, Geophysics, 1972
M.A. - University of Arizona, Geology, 1968
B.A. - St. Olaf College, Math/Physics, 1963

Research Specializations

Near-surface Geophysics

Ongoing Projects

• Geophysical Test Site
• LNAPLs and High Conductivity
• Ft. St. Joseph Archaeology
• Sinaii Ground Water
• Geophysics at Brownfield Sites

Courses Taught

Solid Earth Geophysics;
Potential Methods;
Electrical Methods;
Geophysical Well-logging;
Seismic Methods;
Geophysics Field Courses;
Introductory Geology;
Geology for Engineers;
Fortran.

Selected Publications [5]

1. Atekwana, E.A., Werkema, D.D., Jr., Duris, J.W., Rossbach, S., Atekwana, Eliot A., Sauck, W.A., Cassidy, D.P., Means, J., and Legall, F.D., 2004, "In-situ apparent conductivity measurements and microbial population distribution at a hydrocarbon-contaminated site"; Geophysics, 69 (1), pp. 56-63.


2. Werkema, D., Atekwana, E., Endres, A., Sauck, W., and Cassidy, D., 2003, "Investigating the geoelectrical response of hydrocarbon contamination undergoing biodegradation", Geophys. Res. Lett., 30(12), 1647, doi:10.1029/2003GL017346.


3. Atekwana, Estella A., W. A. Sauck, Gamal Z. A. Aal, and D. D. Werkema, 2002, "Geophysical Investigation of Vadose Zone Conductivity Anomalies at a Hydrocarbon Contaminated Site: Implications for the Assessment of Intrinsic Bioremediation", Jour. of Environmental & Engineering Geophysics, Vol. 7, No. 3, pp. 103-110.


4. Cassidy, D.P., D.D. Werkema, W.A. Sauck, E.A. Atekwana, S. Rossbach, and J. Duris, 2001, The Effects of LNAPL Biodegradation Products on Electrical Conductivity Measurements; Journal of Environmental and Engineering Geophysics, Vol. 6, No. 1, pp. 47-52.


5. Sauck, W.A., 2000, A Model for the Resistivity Structure of LNAPL Plumes and Their Environs in Sandy Sediments; Jour. of Applied Geophysics, Vol. 44, Nos. 2-3, pp. 151-165.