Research Article
The Study of Subsurface Land Drainage Optimal Design Model
Table 7
Well drainage optimal solution for a range of lifespan.
| | Lifespan D (years) | Hydraulic head H (m) | Duration of pumping operation t (days) | Well spacing B (m) | Total cost Z (RMB) | The discharge of each well Qi (m3/day) | Total number of wells n | Surrounding wells spacing Bor (m) | Number of surrounding wells nor | Number of investment wells ni |
| | 1 | 17.5848 | 184.9211 | 881.0597 | 2.9559e + 05 | 2220.8976 | 7.5 | 716.7423 | 3.4 | 4.1 | | 10 | 9.9645 | 104.7862 | 673.7206 | 7.0352e + 05 | 1298.6063 | 12.8 | 515.0194 | 4.7 | 8.1 | | 50 | 8.7810 | 92.3413 | 634.5266 | 1.0038e + 06 | 1151.9073 | 14.5 | 477.2781 | 5.1 | 9.4 | | 100 | 8.7468 | 91.9817 | 633.3536 | 1.0174e + 06 | 1147.6523 | 14.5 | 476.1512 | 5.1 | 9.4 |
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