Simcore Processing Modflow v11.0.6

Processing Modflow is a graphical user interface designed to facilitate the preparation of input data files for various numerical models. Initially developed in 1991 to support the first official release of MODFLOW (McDonald and Harbaugh, 1988), PM has evolved to accommodate numerous versions of the software. Following MODFLOW-88, multiple updates have been released, including MODFLOW-96 (Harbaugh, et al., 1996) and MODFLOW-2000 (Harbaugh, et al., 2000), and others. Additionally, various complementary modeling codes have been developed to expand MODFLOW's capabilities. For instance, MODINV (Doherty, 1990) and PEST (Doherty, 2016) have enabled advanced parameter estimation, while MT3DMS (Zheng et al., 1999) has facilitated solute transport modeling. Consequently, the scope and number of model codes supported by PM have significantly grown over the years.

Processing Modflow provides an intuitive graphical user interface that can display shapefiles and online maps alongside the grids and results of multiple models. It can import MODFLOW, MT3DMS (Zheng, et al., 1999), MT3D-USGS (Bedekar, et al., 2016), and SEAWAT (Langevin, et al., 2007) models from their native input files. PM also supports a variety of data formats for importing model data, including CSV, Shapefiles, and ASCII Raster. Additionally, it can export model results to formats such as raster graphics, shapefiles, charts, Excel spreadsheets, or text files.

The supported model codes include MODFLOW-2005 (Harbaugh, 2005), MODFLOW-NWT (Niswonger, et al., 2011), MODFLOW-OWHM (Boyce, et al., 2020), MODPATH (Pollock, 2016), MT3D-USGS (Bedekar, et al., 2016), SEAWAT (Langevin, et al., 2007), PEST (Doherty, 2016), BeoPEST (Hunt, et al., 2010), PESTPP-IES (Welter, et al., 2015; White, 2018; White, et al., 2020), Zone Budget (Harbaugh, 1990), and GSFLOW (Regan, et al., 2018). The latter couples PRMS (Markstrom, et al., 2015) and MODFLOW-NWT for integrated surface water and groundwater modeling.

This text focuses on the use of Processing Modflow and does not delve into modeling theories or the functionality of the various packages. For more detailed information, users are encouraged to consult the user guides for the supported model codes. Additionally, several comprehensive textbooks on groundwater modeling are available. For example, Anderson, et al. (2015) provides an extensive reference on applied groundwater modeling, while Doherty (2015) offers an in-depth exploration of calibration and uncertainty analysis.