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The Visual Two-Zone Model (Visual TWZN) is freeware software to build up groundwater numerical modeling, in both radial and vertical flow components trough an abstraction well in layered aquifers. The conceptual model and computer native code was developed by Rushton and Redshaw (1979), Rathod and Rusthon (1984 and 1992), and the graphical user interface was developed by our Group Member, the hydrogeologist Noél Hernández Laloth. The model, based on finite-difference approximations using the “two-zone” conceptual approach, can provide a greater flexibility than analytical methods, because the aquifer system is approximated as two horizontal permeable zones with less permeable intermediate layers. ...

Neutron and X-ray reflectivity analysis package (IgorPro/Wavemetrics Procedure): 1) Calculate neutron reflectivity based on the Parratt formalism. 2) Simple and easy to use. 3) Provide a number of functions for interfacial shape between layers. Installation [IgorPro > 6.1(MAC), >5.x(WIN) required]: Option1: Download anywhere on your computer and open_file/procedure from 'File' menu in IgorPro. Option2: Download and copy it into Igor Procedures folder in IgorPro. ...

This is a python package that allows one to easily create timelines in object-oriented python which later renders to HTML.