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The latest version of the GroundWater Spatiotemporal Data Analysis Tool (GWSDAT) has just been released.

The GWSDAT has been developed by Shell Global Solutions for the analysis of groundwater monitoring data. It is designed to work with simple time-series data for solute concentration and groundwater elevation, but can also plot non-aqueous phase liquid (NAPL) thickness if required.

Spatial data is input in the form of well coordinates, and wells can be grouped to separate data from different aquifer units. The software also allows the import of a site basemap in GIS shapefile format. Concentration trend and 2D contour plots generated using GWSDAT can be exported directly to Microsoft PowerPoint and Word to expedite reporting.

A brief list of major updates can be found below and further information on GWSDAT can be found here.

Well Influence Analysis: Building on the existing well redundancy analysis feature, GWSDAT now provides an ordered well omission list such that the wells estimated to have the least influence are presented first. This offers users more assistance in assessing which monitoring wells may be the most suitable for future omission and eventual decommissioning. This well influence order is established via a procedure fully documented here and here.

GW Well Report Functionality: Ability to export the full collection of Well Time Series plots which can include overlaid groundwater and NAPL thickness. See section 6.5 of the user manual – here.

For GWSDAT R Developers:

  • New R package released on CRAN here and on GitHub here.
  • New functionality to read in data.frames directly to the GWSDAT R package – see here.
  • Beta implementation of online GWSDAT Application Programming Interface (API). This allows users to pass data directly to the online version via URL arguments - see here.

Updated User Manual: A fully comprehensive updated description of GWSDAT - including Well Influence Analysis.

Bug Fixes and Enhancements: Numerous bug fixes and enhancements. For example, support for Windows Meta File image format output for spatial plot - useful for rearranging overlapping well labels. Updated Excel Add-in - more robust to 32 bit versus 64 bit version of Excel.