1. Environmental & Engineering Geophysics “Looking through a dark glass dimly.” Insights into groundwater, runoff and the impact of humankind on the environment. © John F. Hermance August 31, 2004

2. Who uses near surface geophysics? Archaeology Israel Pre Columbian America © John F. Hermance August 31, 2004

3. Runoff mechanisms Hydrology © John F. Hermance August 31, 2004

4. Subsurface features Hydrology © John F. Hermance August 31, 2004

5. The geophysicist’s mission: We begin with a blank slate. © John F. Hermance August 31, 2004

6. Using non-invasive methods, and what other information is available we try to answer... © John F. Hermance August 31, 2004

7. © John F. Hermance August 31, 2004 Using non-invasive methods, and what other information is available we try to answer...

8. What’s in the subsurface? © John F. Hermance August 31, 2004 (Some of the questions.)

9. What’s in the subsurface? © John F. Hermance August 31, 2004 (Some of the questions.)

10. What’s in the subsurface? © John F. Hermance August 31, 2004 (Some of the questions.)

11. What’s in the subsurface? © John F. Hermance August 31, 2004 (Some of the questions.)

12. © John F. Hermance August 31, 2004 (Some of the questions.)

13. © John F. Hermance August 31, 2004 Example of a Non-Invasive Geophysical Technique: Ground Penetrating Radar (GPR)

14. Principle of GPR © John F. Hermance August 31, 2004

15. Applying our “composite” moveout correction to trace cross-correlation functions (V Trial = 0.074 m/ns) (But we also need V refractor = 0.122 m/ns) Plot of GPR signals recorded along a profile. © John F. Hermance August 31, 2004

16. Delineating a Stratigraphic Horizon: The “geologic” interpretation of ground penetrating radar (GPR) data. © John F. Hermance August 31, 2004

17. Geophysics that has been done to characterize site: Seismic refraction, DC resistivity, EM, GPR and gravity. [Seismic interpretation from Jeff Sullivan (personal communication.).] Delineating several stratigraphic horizons & bedrock © John F. Hermance August 31, 2004

18. What about infrastructure? © John F. Hermance August 31, 2004

19. Application of the Magnetic Method to Assess “Missing” Items at a Florist’s Shop. © John F. Hermance August 31, 2004

20. © John F. Hermance August 31, 2004

21. An alternative way to present GPR data: Time Slice “Plan” or “3D” View Formats. © John F. Hermance August 4, 2003 Field Site: Long Island North

22. Time Slice: 3D View Field Site: Long Island. Objective: Detect leaching pits. © John F. Hermance August 31, 2004

23. Time Slice: 3D View Interpretation? © John F. Hermance August 31, 2004

24. Time Slice: Plan View (w / interpretation) © John F. Hermance August 31, 2004

25. Application of the Magnetic Method to Delineate a Buried (Lost) “Vault” at a Fall River Mill Site. © John F. Hermance August 31, 2004

26. © John F. Hermance August 31, 2004

27. Environmental & Engineering Geophysics End of Presentation “Looking through a dark glass dimly.” © John F. Hermance August 31, 2004