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Table 2 Chemical data (major elements) of the investigated groundwater samples

From: Rock-water interaction processes based on geochemical modeling and remote sensing applications in hyper-arid environment: cases from the southeastern region of Egypt

Well no. Aquifer Eh pH EC (μS/cm) TDS (mg/l) Cation (mg/l) Anion (mg/l) SAR
Ca2+ Mg2+ Na+ K+ CO32− HCO3 SO42− Cl
1 Alluvial 127 7.7 4200 2427 196.30 111.6 500 7 0.00 137.25 464.06 1079.4 7
2 129 7.6 3970 2153 242.60 108.0 360 6 0.00 134.20 469.5 899.50 4.8
3 82 8.4 3420 2068 135.63 100.6 410 14 30.00 219.60 780 488.30 6.5
4 81 8.4 2408 1253 58.56 114.0 210 13 30.00 259.25 388.92 308.40 3.6
5 104 7.6 13,810 8386 654.40 318.4 1850 20 15.00 79.30 2044.65 3443.8 14
6 107 7.9 16,410 9750 703.60 390.9 2200 17 15.00 122.00 1942.35 4420.4 16.5
7 119 7.4 19,940 11,053 1280.0 555.7 2000 16 0.00 54.90 800 6373.6 11.7
8 124 7.6 33,100 18,854 2117.0 778.8 3700 31 0.00 61.00 1274 10,922 17.4
9 119 7.4 17,320 10,095 1375.0 373.2 1750 20 0.00 45.75 900 5654 10.8
10 100 7.4 13,340 7880 1075.0 190.3 1400 16 0.00 67.10 1567.6 3598 10.3
11 90 7.5 11,550 6446 1100.0 127.7 1050 17 0.00 45.75 633.05 3495 8
12 Nubian Sandstone 130 7.8 1394 776 80.69 40.46 125 10 0.00 167.75 198.47 237.47 2.8
13 145 7.3 25,350 14,388 562.90 727.3 3700 36 15.00 207.40 1841.9 7401 24
14 94 8.5 1621 757 15.63 11.69 245 7 0.00 85.40 64.72 370 11.5
15 97 8.1 1653 778 21.39 36.09 200 9 0.00 115.90 155.45 298.12 6
16 98 8 2045 915 27.80 47.46 230 11 15.00 152.50 178.31 328.96 6
17 96 7.9 2186 943 28.00 58.39 230 11 15.00 146.40 146 380.36 5.6
18 93 7.4 703 341 59.00 20.03 32 6 0.00 122.00 52 110.51 1.1
19 96 7.2 862 425 76.56 22.79 40 9 0.00 158.60 61.192 136.21 1.1
20 93 8.3 723 356 42.46 26.99 40 12 15.00 158.60 53.152 87.38 1.18
21 96 8 655 311 49.76 20.11 32 7 15.00 122.00 37.884 88.67 1.1
22 88 7.9 696 346 58.32 20.84 32 6 15.00 122.00 50.196 102.80 1.1
23 94 7.2 1003 579 99.43 25.03 65 7 0.00 167.75 144.615 154.20 1.51
24 Fractured basement 80 8.3 685 320 13.95 47.80 36 5 15.00 170.80 30.3 86.10 1.04
25 82 8.5 768 353 13.85 50.31 44 7 15.00 183.00 28.636 102.80 1.23
26 90 8.1 5280 3522 140.10 82.84 620 4 15.00 122.00 1751.34 848.10 10
27 75 8.2 862 502 15.91 68.50 55 3 15.00 122.00 178.4 105.37 1.33
28 133 6.7 35,800 19,375 3839.0 477.2 2450 25 0.00 39.65 228.12 12,336 9.9
29 66 8.1 1837 817 45.69 19.34 230 2 18.00 195.20 105.94 298.12 7.19
30 68 8.1 2068 1139 63.72 20.34 320 3 15.00 207.40 243.1 370.08 8.94
31 80 7.8 1931 1027 159.80 40.53 160 3 15.00 213.50 120 421.48 2.93
32 97 7.4 7240 4289 621.00 178.3 620 2 15.00 106.75 1000 1799 5.62
33 85 7.4 3900 2079 294.60 82.86 320 2 18.00 131.15 396.9 899.50 4.24
34 93 7.2 8290 4986 678.00 194.1 750 3 0.00 106.75 1200 2107 6.5
35 94 7.3 10,500 6151 737.50 171.1 1100 10 15.00 134.20 1994.15 2056 9.4
36 85 7.8 9210 5138 487.90 164.9 1100 16 6.00 97.60 1103.75 2210 11
37 96 7.6 23,340 13,673 1200.0 503.0 2800 20 0.00 122.00 3331.9 5756.8 17
Rainfall 7.0 125 80 10.80 3.01 15 2 0.00 49.00 10 15.00 1.00
Sea water 124 8 66,400 38,021 721.20 1668 11,000 330 21.00 64.05 1761.5 22,487 51.4
P.L   6.5–8.5   1000 200 150 200 250 500  
  1. P.L permissible limit according to EHCW (2007), SAR sodium adsorption ratio