Table 1.
Geographical details of the 21 locations under study.
| No. | Location | Latitude (°N) | Longitude (°E) |
|---|---|---|---|
| 1 | Port Sudan | 19.590 | 37.190 |
| 2 | Omdurman | 15.647 | 32.481 |
| 3 | Al-Qadarif | 14.024 | 35.368 |
| 4 | Kassala | 15.458 | 36.404 |
| 5 | Kosti | 13.123 | 32.650 |
| 6 | Al-Obeid | 13.178 | 30.216 |
| 7 | Dongola | 19.146 | 30.470 |
| 8 | Al-Junaynah | 13.448 | 22.465 |
| 9 | Al-Fashir | 13.620 | 25.355 |
| 10 | Nyala | 12.052 | 24.880 |
| 11 | Wadi Halfa | 21.799 | 31.371 |
| 12 | Al-Damazin | 11.785 | 34.342 |
| 13 | Haiya | 18.333 | 36.385 |
| 14 | Ad-Damar | 17.580 | 33.969 |
| 15 | Abu Hamed | 19.535 | 33.321 |
| 16 | Merowe | 18.469 | 31.816 |
| 17 | Kutum | 14.203 | 24.664 |
| 18 | Salala | 21.321 | 36.216 |
| 19 | Wawa | 20.444 | 30.351 |
| 20 | Karima | 18.532 | 31.827 |
| 21 | Al-Goled | 18.471 | 30.644 |