Water resources of Afghanistan / Helmand at Gardandewal
Water resources of Afghanistan / Helmand at Gardandewal
| River: Helmand | Area: 605 km2 | Latitude: 34o30 |
| Station: Gardandewal | Elevation: 2955 m | Longitude: 68o16 |
| Mean for observation period: 1969-1975 | Total months: 74 |
m3/s
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Runoff |
| 1969 | - | - | - | - | - | - | - | 2,91 | 1,79 | - | - | - | - |
| 1970 | 1,28 | 1,78 | 2,15 | 6,71 | 10,27 | 5,14 | 1,98 | 1,18 | 1,02 | 1,54 | 1,44 | 1,24 | 94,0 |
| 1971 | 1,59 | 1,75 | 2,12 | 5,52 | 8,78 | 3,03 | 1,68 | 0,94 | 1,07 | 1,00 | 1,33 | 1,35 | 79,4 |
| 1972 | 1,04 | 1,03 | 1,63 | 7,50 | 22,23 | 17,09 | 3,73 | 1,79 | 1,40 | 1,15 | 1,00 | 1,09 | 159,9 |
| 1973 | 1,82 | 1,76 | 2,16 | 11,67 | 21,61 | 9,33 | 2,81 | 1,61 | 1,27 | 1,34 | 1,62 | 1,84 | 155,1 |
| 1974 | 1,19 | 1,28 | 2,59 | 6,69 | 9,99 | 6,22 | 2,21 | 1,38 | 1,13 | 1,07 | 1,39 | 1,20 | 95,6 |
| 1975 | 1,05 | 1,01 | 1,61 | 7,65 | 18,18 | 11,70 | 2,99 | 1,64 | 1,64 | 1,02 | 1,08 | 1,14 | 133,7 |