Overview

The streamed ERT module is designed for processing and inversion of continuous towed DC data.

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The module includes the option of importing water resistivity and water depth as a priori information for the first layer in the model. There is processing options for mean filters, and manual processing which is fully integrated with the GIS interface. 

Inversion is done with a 1D LCI or SCI using smooth, sharp, or layered models.

 

Modelling and presentation to the customer is done with the well known functions of the Aarhus Workbench so integrating with boreholes, creating reports etc. is easy and only a few clicks away.

 

Key features

• Data processing with integrated GIS interface

• Import of water resistivity and water depth for a priori information

• 1D LCI/SCI inversion with constraints between data points

• Smooth, sharp or layered inversion

• Integrated with the GIS interface

 

 

Import

DC data are imported using a simple column based spread sheet format. In addition, the format supports information for water resistivity and water depth that can be used as a priori in the inversion. Data is mapped during import and mapping can be saved.

 

Processing

The processing tool is integrated with the GIS interface. The processing window shows the data points at each focus depth and the corresponding position on the GIS interface. For manuel processing the user can disable data points or add standard deviation to each data points. There is also an option to keep raw data for inversion.

 

Inversion

Inversion of the DC data is performed with the AarhusInv inversion code. The data can be inverted as a 1D LCI or SCI with few-layered, many-layered or sharp models. Starting values for resistivity, thickness, constraints, chargeability can be individually changed for each layer or optimal values can be chosen automatically. The inversion supports multi CPU cores with a high parallel efficiency. 

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