Updates model uncertainty visualization in Jupyter notebook
Refines presentation of model uncertainty by adding error bars to the resistivity and thickness values in the output plot. Integrates a new table displaying layer resistivity, uncertainty, and thickness with corresponding uncertainties to enhance clarity for users. Updates environment requirements to include `pandas` for improved data manipulation capabilities.
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README.md
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README.md
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[](https://mybinder.org/v2/git/https%3A%2F%2Fgit.geophysik.ruhr-uni-bochum.de%2Fkasper%2FresistivityVES.git/HEAD?urlpath=%2Fdoc%2Ftree%2FVES.ipynb)
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# resistivityVES
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Binder environment using pyGIMLI (https://www.pygimli.org/) to do an VES inversion.
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[](https://mybinder.org/v2/git/https%3A%2F%2Fgit.geophysik.ruhr-uni-bochum.de%2Fkasper%2FresistivityVES.git/HEAD?urlpath=%2Fdoc%2Ftree%2FVES.ipynb)
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Binder environment using [pyGIMLI](https://www.pygimli.org/) to do a VES (Vertical Electrical Sounding) inversion.
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## Overview
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This repository contains a Jupyter notebook (`VES.ipynb`) that demonstrates how to perform 1D DC resistivity inversion using pyGIMLI's built-in VES forward operator. The notebook uses real field data from Bausenberg to invert for a layered earth model.
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## Notebook Contents
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The `VES.ipynb` notebook includes the following workflow:
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### 1. Setup and Imports
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- Imports necessary libraries: `numpy`, `matplotlib`, `pygimli`, and the `VESManager` from `pygimli.physics`
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### 2. Field Data from Bausenberg
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- Uses real VES measurements with AB/2 distances ranging from 1.0 to 100.0 meters
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- Apparent resistivity values (`rhoa`) showing variations from ~64 to ~672 Ωm
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- Error estimates set at 2% for most measurements, increasing to 5% for deeper soundings
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- MN/2 spacing fixed at 0.5 meters
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### 3. Inversion Setup
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- Configures a 3-layer earth model (`nlay=3`)
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- Uses regularization parameter `lam=1000` with a reduction factor of 0.8
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- Inverts the apparent resistivity data to determine layer thicknesses and resistivities
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### 4. Visualization
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The notebook provides comprehensive visualization including:
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- **Model plot**: Displays the inverted resistivity model as a function of depth (up to 50m)
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- **Data fit plot**: Compares measured apparent resistivity data with the model response
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- Both plots are displayed side-by-side for easy comparison
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### 5. Uncertainty Analysis
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- Computes model covariance matrix to assess parameter uncertainties
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- Displays correlation matrix showing interdependencies between layer parameters
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- Generates error bars for both resistivities and layer thicknesses
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- Visualizes uncertainties at layer midpoints and boundaries
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## Requirements
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See `environment.yml` for the complete list of dependencies. Main requirements:
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- pyGIMLI>=1.5.0, which requires at least:
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- numpy
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- matplotlib
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- suitesparse=5.10.1
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- jupyterlab
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## Usage
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Click the Binder badge above to launch an interactive session, or run locally with:
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```bash
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jupyter notebook VES.ipynb
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```
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@@ -8,3 +8,4 @@ dependencies:
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- pygimli>=1.5.0
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- jupyterlab
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- suitesparse=5.10.1
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- pandas
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