Platte River Ecosystem Resources and Management, with Emphasis on the Big Bend Reach in Nebraska
Tables
Table 15. Pulse flow recommendation for the central Platte River valley ecosystem during February and March.
| Period |
Flow (CFS) |
Duration (Days) | Frequency (Yrs) Exceedence (%) | |
| Very Wet | Feb 1 - March 31 | > 16000* | 5** | 1 in 5 (20%) |
| Wet | Feb 15 - March 15 | > 12000* | 5** | 1 in 2.5 (40%) |
| Normal | Feb 15 - March 15 | > 3100 -3600 | 30 | 3 in 4 (75%) |
| Dry | Feb 15 - March 15 | 2000-2500 | 30 | all remaining (100%) |
*At least 50% of these pulse flows should occur during May 20 to June 20,
with May 1 to June 30 as the time frame for broadest benefit for channel maintenance,
and instream and wet meadow habitats. Occurrence between February 1 and June
30 would accomplish the necessary effects for channel maintenance. The 10-year
running average for the mean annual pulse flow targets should range from approximately
8,300 cfs to 10,800 cfs.
** The duration of these pulse flows should emulate the historic, natural
pattern: (a) ascended over approximately 10 days, (b) cresting for approximately
5 days, and (c) descending over approximately 12 days.
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