Studied region | Sample No. | Latitude | Longitude | Sand | Silt | Clay | 40K | 238U | 232Th | 137Cs |
˚N | ˚E | % | % | % | Bq/kg | Bq/kg | Bq/kg | Bq/kg | ||
Al-Qassim | 1 | 26.21 | 43.89 | 72.8 | 15.2 | 12.0 | 283.11 | 23.61 | 27.96 | 4.62 |
2 | 26.41 | 43.82 | 88.8 | 7.2 | 4.0 | 163.16 | 27.45 | 20.19 | 4.09 | |
3 | 26.44 | 43.69 | 88.9 | 8.1 | 3.0 | 153.98 | 22.07 | 24.95 | 4.25 | |
4 | 26.43 | 43.71 | 84.8 | 10.2 | 5.0 | 241.53 | 28.04 | 33.65 | 4.88 | |
Tabuk | 1 | 28.40 | 36.87 | 80.6 | 9.4 | 10.0 | 313.39 | 45.67 | 45.28 | 16.51 |
2 | 28.40 | 36.87 | 75.7 | 12.3 | 12.0 | 310.45 | 48.06 | 60.55 | 16.09 | |
3 | 28.40 | 36.80 | 68.5 | 17.5 | 14.0 | 350.18 | 42.20 | 64.10 | 18.68 | |
4 | 28.40 | 36.78 | 63.6 | 16.4 | 20.0 | 311.20 | 77.84 | 113.15 | 19.91 | |
5 | 28.43 | 36.62 | 63.8 | 15.2 | 21.0 | 338.37 | 76.46 | 75.59 | 21.19 | |
Al-Kharj | 1 | 24.32 | 47.13 | 82.2 | 9.9 | 7.9 | 159.48 | 18.42 | 13.42 | 4.12 |
2 | 24.18 | 47.22 | 86.4 | 8.8 | 4.8 | 204.80 | 17.49 | 25.03 | 4.59 | |
3 | 24.26 | 47.26 | 75.3 | 16.7 | 8.0 | 141.11 | 16.88 | 12.45 | 3.55 | |
4 | 24.21 | 47.57 | 71.8 | 17.2 | 11.0 | 129.20 | 18.81 | 12.26 | 3.94 | |
5 | 24.20 | 47.56 | 85.7 | 7.3 | 7.0 | 103.24 | 19.38 | 15.00 | 3.03 | |
Wadi Aldawaser | 1 | 20.42 | 44.74 | 74.8 | 17.2 | 8.0 | 199.12 | 21.05 | 20.14 | 5.54 |
2 | 20.43 | 44.73 | 80.3 | 15.7 | 4.0 | 217.15 | 23.30 | 24.62 | 5.52 | |
3 | 20.42 | 44.71 | 79.7 | 16.3 | 4.0 | 195.98 | 23.75 | 24.81 | 5.17 | |
4 | 20.44 | 44.74 | 84.4 | 12.6 | 3.0 | 169.92 | 22.25 | 27.69 | 4.79 | |
Aljouf | 1 | 29.99 | 40.12 | 88.8 | 7.2 | 4.0 | 234.23 | 29.63 | 25.19 | 11.46 |
2 | 30.00 | 40.12 | 80.7 | 8.3 | 11.0 | 565.57 | 41.78 | 54.35 | 18.06 | |
Hail | 1 | 27.79 | 41.73 | 74.1 | 15.9 | 10.0 | 518.03 | 51.01 | 56.76 | 19.75 |
2 | 27.80 | 41.75 | 77.3 | 13.7 | 9.0 | 492.63 | 43.73 | 36.18 | 13.96 | |
3 | 27.80 | 41.75 | 71.7 | 15.3 | 13.0 | 477.64 | 71.95 | 55.78 | 23.63 | |
4 | 27.82 | 41.73 | 65.9 | 20.1 | 14.0 | 644.54 | 49.58 | 47.62 | 18.77 | |
Riyadh | 1 | 24.41 | 46.65 | 84.6 | 12.4 | 3.0 | 185.30 | 21.28 | 17.23 | 10.45 |
2 | 24.41 | 45.89 | 86.5 | 9.5 | 4.0 | 221.63 | 19.83 | 19.21 | 9.44 | |
3 | 24.23 | 47.65 | 75.6 | 12.4 | 12.0 | 162.10 | 20.19 | 17.88 | 9.58 | |
4 | 24.33 | 47.14 | 83.2 | 9.8 | 7 | 114.65 | 12.88 | 10.42 | 4.81 |