# Fracture Percolation

**URL:** <https://forum.itascainternational.com/t/fracture-percolation/1628>\
**Category:** 3DEC\
**Tags:** fish\
**Created:** [August 9, 2024, 6:26pm UTC](https://forum.itascainternational.com/t/fracture-percolation/1628 "2024-08-09T18:26:56Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![lucasbmachado](https://avatars.discourse-cdn.com/v4/letter/l/c37758/32.png) [@lucasbmachado](https://forum.itascainternational.com/u/lucasbmachado)\
**Post date:** [August 9, 2024, 6:26pm UTC](https://forum.itascainternational.com/t/fracture-percolation/1628/1 "2024-08-09T18:26:56Z")

</div>

Hello,

3DEC has functions and commands for percolation calculation such as “fracture.percolation” and “fracture compute percolation,” but I can’t understand how it calculates this index and what it is based on. Is there any bibliography?

Best regards

Lucas Machado

---

<div class="post-metadata">

**Author:** ![jhazzard](https://avatars.discourse-cdn.com/v4/letter/j/4af34b/32.png) [@jhazzard](https://forum.itascainternational.com/u/jhazzard)\
**Post date:** [August 12, 2024, 7:45pm UTC](https://forum.itascainternational.com/t/fracture-percolation/1628/2 "2024-08-12T19:45:07Z")

</div>

The equations can be found here: [fracture compute command — Itasca Software 9.0 documentation](https://docs.itascacg.com/itasca900/common/dfn/doc/dfn_manual/dfn_commands/cmd_fracture_compute.html?node625#kwd:fracture.compute.percolation)

But I’m not sure where these came from. @r.legoc ?

---

<div class="post-metadata">

**Author:** ![r.legoc](https://avatars.discourse-cdn.com/v4/letter/r/dfb087/32.png) [@r.legoc](https://forum.itascainternational.com/u/r.legoc)\
**Post date:** [August 13, 2024, 8:17am UTC](https://forum.itascainternational.com/t/fracture-percolation/1628/3 "2024-08-13T08:17:02Z")

</div>

You’ll find a description of the percolation parameter and its relation to DFN connectivity property in those two references: Bour, O. and Davy, P. (1998). On the connectivity of three-dimensional fault networks. Water Resour.Res., 34(10), 2611–2622., ; de Dreuzy, J. R., Davy, P., and Bour, O. (2000). Percolation parameter and percolation-threshold estimates for three-dimensional random ellipses with widely scattered distributions of eccentricity and size. Phys. Rev. E, 62(5), 5948–5952.

---

<div class="post-metadata">

**Author:** ![lucasbmachado](https://avatars.discourse-cdn.com/v4/letter/l/c37758/32.png) [@lucasbmachado](https://forum.itascainternational.com/u/lucasbmachado)\
**Post date:** [August 13, 2024, 1:29pm UTC](https://forum.itascainternational.com/t/fracture-percolation/1628/4 "2024-08-13T13:29:27Z")

</div>

Thank you for the support