Platte River Ecosystem Resources and Management, with Emphasis on the Big Bend Reach in Nebraska
Tables
Table 12. Annual and seasonal volumes for the wet, average, and dry hydrographs of the U.S. Fish and Wildlife Service instream flow recommendations (M. Butler, USFWS, personal communication). These annual volumes do not explicitly include recommendations for those flows which occur on a less frequent basis (e.g., 5-year peak flow of 16,000 acre-feet).
| WET INSTREAM FLOW RECOMMENDATION HYDROGRAPH | |||||||
| Month |
Begin |
End |
CFS |
# Days |
Acre- feet |
Total Acre- Feet | Mean CFS |
| January | 1 | 31 | 1,000 | 31 | 61,500 | 61,500 | 1,000 |
| January | 1,000 | ||||||
| February | 1 | 14 | 1,800 | 14 | 50,000 | ||
| February | 15 | 28 | 3,350 | 14 | 93,000 | 143,000 | 2,575 |
| March | 1 | 15 | 3,350 | 15 | 99,700 | ||
| March | 16 | 22 | 1,800 | 7 | 25,000 | ||
| March | 23 | 31 | 2,400 | 9 | 42,800 | 167,500 | 2,724 |
| April | 1 | 30 | 2,400 | 30 | 142,800 | ||
| April | 142,800 | 2,400 | |||||
| May | 1 | 10 | 2,400 | 10 | 47,600 | ||
| May | 11 | 19 | 1,200 | 9 | 21,400 | ||
| May | 20 | 31 | 3,000 | 12 | 71,400 | 140,400 | 2,284 |
| June | 1 | 20 | 3,000 | 20 | 119,000 | ||
| June | 21 | 30 | 1,200 | 10 | 23,800 | 142,800 | 2,400 |
| July | 1 | 31 | 1,200 | 31 | 73,800 | ||
| July | 73,800 | 1,200 | |||||
| August | 1 | 31 | 1,200 | 31 | 73,800 | ||
| August | 73,800 | 1,200 | |||||
| September | 1 | 15 | 1,200 | 15 | 35,700 | ||
| September | 16 | 30 | 1,000 | 15 | 29,800 | 65,500 | 1,100 |
| October | 1 | 31 | 2,400 | 31 | 147,600 | ||
| October | 147,800 | 2,400 | |||||
| November | 1 | 15 | 2,400 | 15 | 71,400 | ||
| November | 16 | 30 | 1,000 | 15 | 29,800 | 101,200 | 1,700 |
| December | 1 | 31 | 1,000 | 31 | 61,500 | ||
| December | 61,500 | 1,000 | |||||
| Total Acre-Feet | 1,321,300 | ||||||
| AVERAGE INSTREAM FLOW RECOMMENDATION HYDROGRAPH | |||||||
| Month |
Begin |
End |
CFS |
# Days |
Acre- feet |
Total Acre- Feet | Mean CFS |
| January | 1 | 31 | 1,000 | 31 | 61,500 | ||
| January | 61,500 | 1,000 | |||||
| February | 1 | 14 | 1,800 | 14 | 50,000 | ||
| February | 15 | 28 | 3,350 | 14 | 93,000 | 143,000 | 2,575 |
| March | 1 | 15 | 3,350 | 15 | 99,700 | ||
| March | 16 | 22 | 1,800 | 7 | 25,000 | ||
| March | 23 | 31 | 2,400 | 9 | 42,800 | 167,500 | 2,724 |
| April | 1 | 30 | 2,400 | 30 | 142,800 | ||
| April | 142,800 | 2,400 | |||||
| May | 1 | 10 | 2,400 | 10 | 47,600 | ||
| May | 11 | 19 | 1,200 | 9 | 21,400 | ||
| May | 20 | 31 | 3,000 | 12 | 71,400 | 140,400 | 2,284 |
| June | 1 | 20 | 3,000 | 20 | 119,000 | ||
| June | 21 | 30 | 1,200 | 10 | 23,800 | 142,800 | 2,400 |
| July | 1 | 31 | 1,200 | 31 | 73,800 | ||
| July | 73,800 | 1,200 | |||||
| August | 1 | 31 | 1,200 | 31 | 73,800 | ||
| August | 73,800 | 1,200 | |||||
| September | 1 | 15 | 1,200 | 15 | 35,700 | ||
| September | 16 | 30 | 1,000 | 15 | 29,800 | 65,500 | 1,100 |
| October | 1 | 31 | 1,800 | 31 | 110,700 | ||
| October | 110,700 | 1,800 | |||||
| November | 1 | 15 | 1,800 | 15 | 53,600 | ||
| November | 16 | 30 | 1,000 | 15 | 29,800 | 83,300 | 1,400 |
| December | 1 | 31 | 1,000 | 31 | 61,500 | ||
| December | 61,500 | 1,000 | |||||
| Total Acre-Feet | 1,266,500 | ||||||
| DRY INSTREAM FLOW RECOMMENDATION HYDROGRAPH | |||||||
|
Month |
Begin |
End |
CFS |
# Days |
Acre- feet |
Total Acre- Feet | Mean CFS |
| January | 1 | 31 | 600 | 31 | 36,900 | ||
| January | 36,900 | 600 | |||||
| February | 1 | 14 | 1,200 | 14 | 33,300 | ||
| February | 15 | 28 | 2,250 | 14 | 62,500 | 95,800 | 1,725 |
| March | 1 | 15 | 2,250 | 15 | 66,900 | ||
| March | 16 | 22 | 1,200 | 7 | 16,700 | ||
| March | 23 | 31 | 1,700 | 9 | 30,300 | 114,000 | 1,853 |
| April | 1 | 30 | 1,700 | 30 | 101,200 | ||
Previous Section -- Table 11
Return to Contents
Next Section -- Table 13
