Scientific Investigations Report 2006–5060
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5060
Table 2. Annual deliveries used in the model scenarios for downstream water users and instream flow requirements, Hagg Lake, Oregon.
[Downstream water users: TVID, Tualatin Valley Irrigation District; JWC, Joint Water Commission; CWS, Clean Water Services; LO, Lake Oswego Corporation. “Other” refers to deliveries to users such as local golf courses. In 2002, other deliveries totaled 906 acre-feet. Instream flow requirements are 10 cubic feet per second (ft3/s) (December–September) and 20 ft3/s (October–November) for the base cases, and 25 ft3/s (all year) for other scenarios. Deliveries to LO, TVID, and base case CWS could be used to meet instream flows. Instream flow values refer to additional releases necessary to meet instream requirements]
| Scenario | Annual deliveries, in acre-feet | |||||
|---|---|---|---|---|---|---|
| Downstream water users | Instream flow |
Total | ||||
| TVID + other | JWC | CWS | LO | |||
| 2002 | ||||||
| 0 | 19,900 | 8,690 | 12,600 | 496 | 3,370 | 45,100 |
| 1a, 2a, 3a, 4a | 19,900 | 8,690 | 25,500 | 496 | 9,460 | 64,100 |
| 1b, 2b, 3b, 4b | 27,000 | 29,600 | 19,200 | 496 | 9,290 | 85,600 |
| 5a, 6a, 7a, 8a | 19,900 | 8,690 | 25,500 | 496 | 9,460 | 64,000 |
| 5b, 6b, 7b, 8b | 27,000 | 40,700 | 23,600 | 496 | 9,290 | 101,000 |
| 9a | 19,900 | 8,690 | 25,500 | 496 | 9,190 | 63,800 |
| 9b | 27,000 | 50,300 | 25,500 | 496 | 9,290 | 113,000 |
| 10a, 11a, 12a, 13a | 19,900 | 8,690 | 25,500 | 496 | 9,190 | 63,800 |
| 10b, 11b, 12b, 13b | 27,000 | 50,300 | 25,500 | 496 | 9,290 | 113,000 |
| 14a | 19,900 | 8,690 | 25,500 | 496 | 9,190 | 63,800 |
| 14b | 27,000 | 50,300 | 25,500 | 496 | 9,290 | 113,000 |
| 15a | 19,900 | 8,690 | 25,500 | 496 | 9,190 | 63,800 |
| 15b | 27,000 | 34,800 | 21,300 | 496 | 9,290 | 92,900 |
| 2001 | ||||||
| 0 | 10,700 | 8,760 | 2,400 | 383 | 4,470 | 26,700 |
| 14a | 10,700 | 8,760 | 12,600 | 383 | 10,800 | 43,200 |
| 14b | 23,200 | 11,600 | 10,800 | 328 | 10,400 | 56,300 |
| 15a | 10,700 | 8,760 | 12,600 | 383 | 10,800 | 43,200 |
| 15b | 22,200 | 11,100 | 10,400 | 315 | 10,400 | 54,400 |
For more information about USGS activities in Oregon, visit the USGS Oregon Water Science Center home page.
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