EnDrain :  Drainage equations for depth and spacing of subsurface drains aiming at watertable (water table) and soil salinity control in irrigated agricultural lands
Free download of software

The EnDrain computer program calculates the drainage discharge, hydraulic head, or spacing between parallel subsurface (sub-surface) drains: pipe/tile drains or open ditches, with or without entrance resistance and shows the curve of the watertable (water-table).
      The computations are needed for the design of subsurface drainage systems of rainfed or irrigated agricultural land for waterlogging (water logging), watertable (water table) and soil salinity control.
      EnDrain can be used for the reclamation (remediation, rehabilitation, restoration) of saline (salty) soils.
The simulation software is free for download. It can be called shareware (freeware) and is in public domain.

The drain spacing calculations are based on the concept of the energy balance of groundwater (ground-water) flow. However, the traditional concepts based on the Darcy and waterbalance (water balance, budget) or mass conservation equations are also used.
      The program allows for the presence of three different soil layers with different hydraulic conductivity and permeability: one layer above and two below drain level. The last two layers can also have different horizontal and vertical hydraulic conductivity or permeability (anisotropy).
      Examples are given.
On 21 May 2012 the auxiliary Fortran programs of the EnDrain model were eliminated and the contents were integrated into the Delphi program.

The program starts clicking on EnDrain.Exe.
More information is given in the program itself.

On 10 August 2010 the program was improved thanks to comments of Nicolas Deeks.
On 14 June 2011 the user interface was improved thanks to a request of Robin Johnston.
On 17 May 2012 the EnDrain program was improved thanks to suggestions by Pepe del Monte.

Publications on the physical and mathematical theory of the energy balance of groundwater (ground-water) flow and examples of EnDrain applications are found on the articles page or directly as PDF document.

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& models

General articles
& manuals

(in Spanish,
 en Español)

reports & cases

reports & cases

& answers


 Screen print of figure in EnDrain program
drain spacing equations

 Example of results of drainage model
influence of hydraulic

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