Table 1.
Soil properties.
| Properties | Site 1 (Brahmaputra riverbank) | Site 2 (natural slope near IIT Guwahati-core 4) |
|---|---|---|
| Coordinates | 26° 10′ 50″ N; 91° 41′ 26″ E | 26° 11′ 05″ N; 91° 41′ 32″ E |
| pH | 7.5 | 8 |
| Electrical conductivity (µS/cm) | 8 | 22 |
| Cation exchange capacity (meq/100 g) | 0 | 10 |
| Predominant minerals | Quartz, mica | Quartz, hematite, kaolinite |
| Environmental temperature | 32 ± 3 °C | 32 ± 3 °C |
| Specific gravity | 2.7 | 2.65 |
| Coarse sand content% (2 mm–4.75 mm) | 0 | 1 |
| Medium sand content% (0.425–2 mm) | 1 | 26 |
| Fine sand content% (0.075–0.425 mm) | 94 | 54 |
| Silt content % (0.002–0.075 mm) | 5 | 14 |
| Clay content % (≤ 0.002 mm) | 0 | 5 |
| Coefficient of uniformity (Cu) | 1.67 | 18.75 |
| Coefficient of curvature (Cc) | 1.06 | 4.68 |
| USCS classification | SP | SC |
| USDA classification | Sand | Loamy sand |
| Taxonomy | Entisols | Ultisols |
| Maximum dry density (kN/m3) | 15.36 | 16.75 |