L10-page3 - • Wenner – a spacing • Schlumberger –...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
3 Vertical Electric Sounding • When trying to probe how resistivity changes with depth, need multiple measurements that each give a different depth sensitivity. • This is accomplished through resistivity sounding where greater electrode separation gives greater depth sensitivity. VES Data Plotting Convention • Plot apparent resistivity as a function of the log of some measure of electrode separation.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: • Wenner – a spacing • Schlumberger – AB/2 • Dipole-Dipole – n spacing • Asymptotes: • Short spacing << h 1 , ρ a = ρ 1 . • Long spacing >> total thickness of overlying layers, ρ a = ρ n • To get ρ a = ρ true for intermediate layers, layer must be thick relative to depth. Schlumberger ρ 2 > ρ 1 ρ 1 > ρ 2 ρ 2 > ρ 3 > ρ 1 ρ 3 > ρ 1 > ρ 2...
View Full Document

This note was uploaded on 01/07/2012 for the course PHYSICS 384 taught by Professor Wei during the Spring '09 term at SUNY Stony Brook.

Ask a homework question - tutors are online