Underlying data for Slimani et al. Identification of dominant hydrogeochemical processes for groundwaters in the Algerian Sahara supported by inverse modeling of chemical and isotopic data

The data hereafter underlie the paper by Slimani et al. doi:10.5194/hess-20-1-2016,

appeared to Hydrol. Earth Syst. Sci., 20, 1-23, 2016.

1. File Tableaux_data.xls

This is an Excel sheet file. It contains:

- raw analytical data, mostly in mg/L;

- data converted in mmol/L;

- data corrected from the defect of cations - anions balance; the correction is made proportionally.

- the previous data completed with logarithms of activities, computed by Phreeqc, 

for calcium, sulfate, carbonate and water; those data are used to plot equilibrium diagrams for calcite and gypsum (figure 6);

- for Phreatic aquifer only, saturation indexes for halite, anhydrite, calcite, dolomite and gypsum, along with distance from south to north, used in figure 7.

2. Directory Phreeqc_res

Contains the input file with all samples from CI, CT and Phr in a single file, and the selected output file.

All calculations were made with version phreeqc-3.1.2 and database sit.dat.

3. Directory Inverse models

This directory contains inverse models for computing transformations:

- from CI (average) to CT (average):

- from CT (average) to Phr (pole I, average);

- from pure water to Phr (pole II, sample P036);

- for mixing Phr pole I and II, and try to explain a sample typical of medium mixing ratio, sample P068.