Hydrogeology 101: GeoVES - Free 1D VES inversion for groundwater exploration

Описание: In this video I will show you how to use GeoVES - a Free Excel-based tool for the 1D inversion of Vertical Resistivity Soundings (VES). GeoVES works with VBA, so you need to enable the Macros in Excel. GeoVES is an XLS file. Do NOT save it in any other format.

00:00 Introduction
00:45 How to use GeoVES
02:41 Loading the data into the Data sheet
04:47 Plot data on the chart
05:11 Send data to GeoVES
08:24 Check data in the Model sheet
08:55 Sensitivity Analysis
09:30 Print the results to PDF
11:00 Final words

Below are the links to the Excel files in Google Drive. Please save the files to your computer and work on a copy of them in Excel. Note that the GeoVES master is read only, so you need to either unlock your copy of the file, or save it as an XLS file.

Link to GeoVES Master XLS file: https://bit.ly/2OpcMvm
Link to GeoVES example from Punjab discussed in the video: https://bit.ly/3rQPRXg
Link to the video on YouTube:    • Hydrogeology 101: GeoVES - Free 1D VES inv...  
Link to a YouTube video on introduction to resistivity surveys:    • Hydrogeology 101: Introduction to Resistiv...  

How to use GeoVES:
1) Enter your field data in the Data Sheet. You will need the deltaV/I of each reading, and their AB/2 and MN spacings. You can also add up to 12 project metadata descriptions and their values.
2) Press "Plot data on chart" and see if the different MN apparent resistivity curves line up. If not, you can shift them by changing the MN spacings.
3) Press "Send data to GeoVES".
4) In the GeoVES sheet, enter the resistivity and thickness values for each layer. Up to 8 layers are allowed, though normally you should not use more than 3 our 4.
5) You can remove any bad data points in the Model sheet. Just delete the "1" next to the bad value.
6) In GeoVES press "Sensitivity Analysis". This will show you how sensitive each part of your model is. The dotted lines show how much each parameter needs to be changed to increase the overall model RMS error by 10%.
7) Plot the workbook or send it straight to PDF. Note that it plots in Black and White to save your ink.

#GeoVES #Resistivity #VES