I am pleased to announce another package in my suite of applications for civil engineers, TerraPercalatio - A solution for groundwater flow. Engineers frequently have to deal with water in the ground, whether it is dealing with water inflow into an excavation, seepage pressures within a slope or designing drainage. TerraPercolatio has been designed for that. It is a general 2D steady-state seepage solver for multi-layer anisotropic materials, both confined and unconfined flow and produces true flow nets from the exact dual (stream-function) problem.

Used for drawing flownets and pwp. diagrams it including examples for most cases an engineer will encounter in practice. For example, a sheeted excavation in multi layered anisotropic soil. Hee is a zoned earth dam with a clay core An important class of problem is unconfined flow within a slope. here is a simple example that includes recharge through rainfall. Suction can be taken into account when calculating porewater pressures. Flow to a rectangular excavation. Other examples covered include flow to a pumped well and groundwater lowering by wellpoints or drainage trenches. TerraPercolatio[] is freely available as a function in the Wolfram function repository as an installable .paclet . At
https://resources.wolframcloud.com/PacletRepository/resources/MalcolmWoodruff/Framica/

If you like this programme or find it useful then you may find my other contributions of interest, they are all free to use, but I would recommend that you satisfy yourself as to their accuracy and suitability for your needs.

An Introduction to Mathematica for civil engineers https://www.notebookarchive.org/2026-01-dtiqavj.

Using Finite Elements to Analyse Structures http://www.notebookarchive.org/2026-01-dtiqavj/

Framica- 3D Space Frame Analysis https://resources.wolframcloud.com/PacletRepository/resources/MalcolmWoodruff/Framica/

LineTerra- For designing and quantifying earthworks. downloading survey and Lidar information and route design. https://resources.wolframcloud.com/PacletRepository/resources/MalcolmWoodruff/Framica/

TerraLapsus -Limitas Limit equilibrium methods for slope stability. (In preparation}