Scientific Investigations Report 2007–5186
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5186
Table 7. Accounting for annual mean streamflow in the main stem of the Columbia River, water year 2000.
[Abbreviations: OR, Oregon; WA, Washington; ft3/s, cubic foot per second; NA, indicates an assumption was made that no flow accumulation was in the reach]
| Map index No. | Main-stem site name and reach | Reach | River mile | Annual mean streamflow (ft3/s) | Gain in reach (ft3/s) | Sum of measured annual mean tributary inflows (ft3/s) | Measured tributary inflows as percentage of main-stem gain |
|---|---|---|---|---|---|---|---|
| 86 | Northport, WA | 735 | 106,000 | ||||
| 1 | 7,800 | 7,020 | 90.0 | ||||
| 77 | Grand Coulee, WA | 596 | 113,000 | ||||
| 2 | 6,600 | 8,270 | 125 | ||||
| 51 | Vernita Bridge, WA | 388 | 120,000 | ||||
| 3 | 65,400 | 59,700 | 91.2 | ||||
| 38 | Warrendale, OR | 189 | 185,000 | ||||
| 4 | 0 | 0 | NA | ||||
| 40 | Upstream of Willamette River, OR | 103 | 185,000 | ||||
| 5 | 46,500 | 35,100 | 75.5 | ||||
| 44 | Beaver Army Terminal, OR | 54 | 232,000 |