A version called SaltModM with a modernized user interface for the input replaces the classic version. In June 2020 it was considered necessary to provide the modernized SaltModM version with the option to pause the calculations each year so that input changes (for example the seasonal rainfall) can be made annually.
Another version has been made, called SaltModMY, with the possibility to include in the input menu the seasonal irrigation, rainfall, runoff, surface drainage and agricultural data for all years over which the model is instructed to run. The yearly pause for manual input changes is then not required. This version van be made available on request. but it can also be downloaded from this address.
On 6 October 2012, thanks to comments made by Jason Keller and Jacob Scherberg, a simpler version of SaltMod was introduced by the name of SaltCalc. It lacks the crop rotation and farmers' response options, but it permits the calculation of daily, weekly or monthly instead of seasonal water and salt balances in the soil.
The manual contains the principles, theory, user
manual and examples of applications. It can be
found directly as
document or on the articles
page from where it can also be downloaded.
The introduction of the manual can be viewed here.
The table of contents of the manual can be seen here on-line.
In addition, a PowerPoint slide show can be viewed on-line or downloaded.
A description of the principles of water and salt balances in the soil on which SaltMod is based is to be found on this balances page
An article on the application of SaltMod in Egypt was published in the Annual report of ILRI. See SaltMod in Egypt.
Also, an article on the application of SaltMod in Portugal was published by Vanegas. See SaltMod in Leziria Grande.
Futher, an article on the application of SaltModM in India can be found at SaltMod modeling, while an article on SaltModMY is to be seen at SaltMod yearly input.
A paper on the farmers' responses to shallow depth of the water table and/or high soil salinity can be downloaded from the farmers paper.
A project report on the influence of quantity of irrigation water on the agro-hydro-salinity conditions of the soil using the SaltModM model with data from the Mashtul Pilot Area, Egypt can be consulted at Mashtul document.
A list of publications in world literature (some 50) where SaltMod was used can be seen in this SaltMod list
In SaltMod there are various soil layers including the
rootzone and aquifer.
There can be subareas with different irrigation intensity, as well as fallow land.
Reuse of drainage water and water pumped up from the wells form part of the model.
|The salinity of the transition zone in this case appears to reduce in each season and in every year, but after year 11 it will come to an equilibrium.|
The capillary rise into the transition zone of the
unirrigated land starts in year 5.
Thereafter, in season 2, it remains constant at 40 mm per season.
In season 1 the capillary rise continues to increase up to year 21, whereafter it reduces.
The reason for the reduction may be that irrigated land is being abandoned due to salinization so that to flow of percolation losses to the unirrigated land reduces and the capillary rise follows suit.
Intially the watertable is quite deep, but due to the
introduction of irrigation, it starts rising, to reach
an equilibrium after year 7.
In season 1, which is the irrigation seaon, the water table after year 7 is shallower than in season 2.