طراحی نرم‌افزار Hydrogeochem برای بررسی ویژگی‌های هیدروژئوشیمیایی و کیفیت آب

Development of Hydrogeochem software for investigation of hydrogeochemical properties and water quality
Introduction
Graphic evaluation is an important part of hydro-geochemical evaluation of surface and groundwater resources, by which important water characteristics such as origin, use, main reactions, type, sample classification, and many other specific water issues are identified. So far, various softwares have been presented in this field, each of which has advantages and disadvantages.
The purpose of designing Hydrogeochem is to provide a software with a simple environment, free of any complexity to check the quality of water, which, while providing the necessary facilities, has no installation restrictions.
 
Materials & Methods
Hydrogeochem is a Windows software that is compatible with a variety of Windows and is designed to draw some of the most widely used hydrogeochemical diagrams such as Piper, expanded Durov, Stiff, Schoeller, Wilcox, and the USSL. It is very easy to work with and has a fast operation. Simultaneous evaluation of 999 water samples (in groups or case) is possible with this software.
The major elements including calcium, magnesium, sodium and potassium, chloride, sulfate, carbonate and bicarbonate are the qualitative parameters necessary to study most qualitative diagrams. Moreover, the pH and total dissolved solids are also used in some diagrams. In the designed software, linear equations were used to draw the position of each sample.
In the case of diagrams such as Piper and Durov diagrams, line equations for cations and anions are first formed, and then their intersection is calculated. Finally, the points obtained are plotted in a Cartesian system. For all the basic diagrams, on which the data are implemented, their mathematical equations are used so that the quality of the output images is not reduced.
 
Discussion of Results & Conclusions
The figure below shows the main windows of the Hydrogeochem. In designing the Hydrogeochem software, we tried to consider the most important qualitative analysis diagrams, including the expanded Durov, which is one of its great advantages.
Another advantage of this software is that it draws the Schoeller diagram based on the limits of drinking water quality and simultaneous display of pH.

In this software, it is possible to draw diagrams after calculating the ionic balance. Although the presence of an error in chemical analysis does not lead to the failure of drawing the sample quality diagram, it notifies the user of the error.
Data entry, necessary settings, and the output of the software are designed in the simplest possible way, and this software lacks any complexity. In the next version, we try to provide the necessary facilities for calculating statistical indicators and drawing contour maps using statistical and geostatistical tools.