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Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details Learning Goals for USF B.S. and M.S. students and workshops in Latin America Hands-on experience Using physical intuition basic underlying physics Forward modeling and processing toolbox Science communication writing reports discussing posters Geophysics field opportunities at USF 1. Principles of Applied Geophysics Field project Principles of Applied Geophysics Logistics Principles of Applied Geophysics Logistics Principles of Applied Geophysics Logistics Principles of Applied Geophysics Logistics Principles of Applied Geophysics Logistics Principles of Applied Geophysics Assessment toolbox Principles of Applied Geophysics Data archive Geophysics field opportunities at USF 2. Geophysics Field Camp Learning Goals Hands-on experience Using physical intuition basic underlying physics Forward modeling and processing toolbox Science communication writing reports, combined analysis of multiple methods on site Geophysics Field Camp Logistics Geophysics Field Camp Logistics $ Geophysics Field Camp Logistics Geophysics Field Camp Logistics Geophysics Field Camp Logistics Geophysics Field Camp Assessment Section heading Introduction Methods Results Discussion Strengths and Limitations (of this method) Sample content Why this site? Purpose of resistivity/conductivity measurements: Expect to see freshwater/saltwater interface (describe expected conductivity contrast) May see tar mats, buried tar mats (describe expected conductivity contrast) Ground truthing Equipment: AGI Supersting R8 resistivity meter Field geometries: 28 electrodes, 1-m spacing Acquisition parameters: dipole-dipole and inverse Schlumberger array geometries, 2 cycles/reading Processing software: Res2dinv Processing steps: Editing data (what % removed, why?), inversion parameters, number of iterations,… Map, position information Describe data volume, data quality Raw data (if appropriate) = pseudosection Processed data = inversion Xsection(s) On processed data image (preferably second copy), add notations with geologic interpretations Comparisons with ground truthing Comparisons with other methods (if available) If appropriate, what didn’t work and why Finer spatial resolution than EM-31 or EM-34 (be quantitative if possible) Labor-intensive (xx hrs for xx meters of profile) Geophysics Field Camp Assessment Geophysics Field Camp Geophysics field opportunities at USF 3. Field Geophysics Field Geophysics Logistics Field Geophysics Assessment Section heading Introduction Methods Results Discussion Strengths and Limitations (of this method) Sample content Why this site? Purpose of resistivity/conductivity measurements: Expect to see freshwater/saltwater interface (describe expected conductivity contrast) May see tar mats, buried tar mats (describe expected conductivity contrast) Ground truthing Equipment: AGI Supersting R8 resistivity meter Field geometries: 28 electrodes, 1-m spacing Acquisition parameters: dipole-dipole and inverse Schlumberger array geometries, 2 cycles/reading Processing software: Res2dinv Processing steps: Editing data (what % removed, why?), inversion parameters, number of iterations,… Map, position information Describe data volume, data quality Raw data (if appropriate) = pseudosection Processed data = inversion Xsection(s) On processed data image (preferably second copy), add notations with geologic interpretations Comparisons with ground truthing Comparisons with other methods (if available) If appropriate, what didn’t work and why Finer spatial resolution than EM-31 or EM-34 (be quantitative if possible) Labor-intensive (xx hrs for xx meters of profile) Field Geophysics Workshops Latin America Field Geophysics Workshops Case studies for subsequent students with access to site but not to equipment Critical to find sites with some ground-truthing Field Geophysics Workshops Field Geophysics Workshops