Scientific Investigations Report 2006-5023
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5023
Table 2. Boundary conditions for discharge scenarios for the Tanana River at Nenana, Alaska, simulated using one- and two-dimensional hydraulic models.
[Discharge scenario: Q100 (Nenana Low, High), calculated flood on Tanana River with return interval of 100 years and low, high discharge on Nenana River. Q500 (Nenana Low, High), calculated flood on Tanana River with return interval of 500 years and low, high discharge on Nenana River. Discharge, Tanana Slough: Discharge determined by one-dimensional model (HEC-RAS, Hydrologic Engineering Center River Analysis System), two-dimensional model (RMA2, Resource Management Associates). Abbreviations: ft3/s, cubic foot per second; ft, foot]
| Discharge scenario | Boundary conditions | |||||
|---|---|---|---|---|---|---|
| Discharge (ft3/s) | Initial water- surface elevation at river station 0(ft) | |||||
| Tanana River | Nenana River | Tanana Slough | ||||
| HEC-RAS | RMA2 | |||||
| August 19, 1998 | 42,700 | 11,800 | 3,680 | 1,800 | 343.7 | |
| August 17, 1967 | 171,000 | 30,800 | 13,300 | 13,400 | 352.9 | |
| Q100 (Nenana Low) | 162,000 | 12,000 | 11,600 | 11,500 | 351.6 | |
| (High) | 162,000 | 69,000 | 13,200 | 18,400 | 354.0 | |
| Q500 (Nenana Low) | 203,000 | 12,000 | 16,200 | 14,900 | 353.4 | |
| (High) | 203,000 | 69,000 | 18,000 | 22,000 | 355.6 | |
For more information about USGS activities in Alaska, visit the USGS Alaska Water Science Center home page.
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