Table 3.
Chemical properties of loess in the study area.
| The number of the borehole | Sample depth m | HCO3 mg/kg | Cl– mg/kg | SO42– mg/kg | Ca2+ mg/kg | Mg2+ mg/kg | Na+ + K+ mg/kg | PH value | Total soluble salt mg/kg | Molar ratio Cl–/2SO42– | Sodium sulfate content % |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TK11-1 | 0.8–1.0 | 331 | 560 | 703 | 240 | 29 | 494 | 7.6 | 2360 | 1.08 | 0.04 |
| TK11-2 | 1.8–2.0 | 265 | 415 | 818 | 72 | 29 | 623 | 7.5 | 2220 | 0.69 | 0.11 |
| TK11-3 | 2.8–3.0 | 331 | 456 | 559 | 72 | 15 | 578 | 7.5 | 2010 | 1.11 | 0.09 |
| TK11-4 | 3.8–4.0 | 463 | 539 | 530 | 144 | 15 | 585 | 7.6 | 2280 | 1.38 | 0.07 |
| TK11-5 | 4.8–5.0 | 463 | 539 | 732 | 96 | 15 | 737 | 7.6 | 2580 | 1.00 | 0.12 |
| TK11-6 | 5.8–6.0 | 397 | 477 | 732 | 90 | 15 | 672 | 7.5 | 2390 | 0.88 | 0.11 |