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
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.
reports & cases
reports & cases
Figure screen of EnDrain program
Example of results