Electrical Resistivity Imaging Field Survey

• Is it possible to survey on concrete or exposed hard rock surfaces without drilling?
• What is the Fall-Off-Potential (FOP) method?

General questions about ERI

• Is removing bad/noisy data acceptable?
• How will the weather affect my survey and SuperSting™?
• Will Roll-Along increase my survey depth?
• What should I use as my scaling factor?
• Can I make measurements in the rain or in a thunderstorm?
• How deep beneath the surface can I see using Electrical Resistivity Imaging?
• How do I find groundwater using Electrical Resistivity Imaging?
• How do I perform the Wenner Four-Electrode Method using my SuperSting™? (ASTM G57)
• What are some common terms I should know when talking about Electrical Resistivity Imaging?
• What do I need to know before going into the field for my survey?
• What is Electrical Resistivity Imaging (ERI)?
• What resolution can I expect?
• Will a fence (or a conductive surface object) affect my results?

Setting up a Survey

• What do I do if my Lowrance GPS shows the wrong date?
• What is considered good contact resistance?
• How do I improve contact resistance?
• How do I keep animals away from my survey lines?
• How can I calculate the spacing needed between boreholes?
• How do I set up an array that uses fewer than the full amount of electrodes I have?
• How do I edit a Command (cmd) File manually?
• Do I need to account for topography when planning a survey?
• How do I create my own borehole cable?
• How do I know which electrodes are potential and which are current?
• How much room do I need to perform an ERI survey?
• What AGI equipment do I need for Electrical Resistivity Imaging?
• What do I need to do to perform a 2D Resistivity/IP/SP Survey?
• What do I need to do to perform a Parallel 3D Resistivity/IP/SP Survey? (Not full 3D)
• What is the smallest/largest electrode spacing I can use?
• What is the Wenner Four-Electrode Method? (ASTM G57)
• Which array should I use?