Scientific Investigations Report 2007–5205
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5205
Table 5. Summary of model results for selected ephemeral watersheds in Carson Valley, Nevada and California, water years 1990–2002.
[Values in inches are volumes in acre-feet, divided by watershed area, in acres, multiplied by 12. Watershed No.: “e” indicates ephemeral watershed. Locations are shown in figure 3. Index model: Watershed model of gaged watershed (see table 1) used as index model for watershed model of ephemeral watershed. Simulated runoff efficiency: Runoff as a percentage of precipitation. Simulated mean annual ground-water inflow: Ground-water inflow is defined as ground-water inflow to basin-fill aquifers of Carson Valley. Abbreviations: acre-ft, acre-feet; in., inch]
| Watershed No. | Drainage area (acres, rounded) | Index model | Simulated | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean annual precipitation | Mean annual evapotranspiration | Mean annual runoff | Runoff efficiency (percent) | Mean annual ground-water inflow | |||||
| acre-ft (in.) | acre-ft (in.) | acre-ft (in.) | acre-ft (in.) | ||||||
| 1e | 2,120 | Daggett Creek | 3,980 | 2,090 | 930 | 23 | 960 | ||
| (23) | (12) | (5.3) | (5.4) | ||||||
| 2e | 600 | Fredericksburg Canyon1 | 1,150 | 590 | 530 | 46 | 4 | ||
| (23) | (12) | (11) | (0.08) | ||||||
| 3e | 1,320 | Fredericksburg Canyon | 2,430 | 1,320 | 1,020 | 42 | 8 | ||
| (22) | (12) | (9.3) | (0.07) | ||||||
| 4e | 500 | Fredericksburg Canyon | 830 | 410 | 370 | 45 | 4 | ||
| (20) | (9.8) | (9) | (0.1) | ||||||
| 5e | 2,270 | Fredericksburg Canyon | 4,330 | 2,350 | 1,760 | 41 | 30 | ||
| (23) | (12) | (9.3) | (0.2) | ||||||
| 6e | 2,190 | Daggett Creek | 3,930 | 1,660 | 980 | 25 | 1,230 | ||
| (22) | (9.1) | (5.4) | (6.7) | ||||||
| 7e | 340 | Daggett Creek | 750 | 350 | 200 | 27 | 210 | ||
| (27) | (12) | (7.3) | (7.4) | ||||||
| 8e | 1,700 | Daggett Creek | 3,460 | 1,670 | 950 | 27 | 910 | ||
| (24) | (12) | (6.7) | (6.4) | ||||||
| 9e | 720 | Fredericksburg Canyon | 1,290 | 640 | 590 | 46 | 8 | ||
| (22) | (11) | (9.8) | (0.1) | ||||||
| 10e | 2,500 | Fredericksburg Canyon | 5,790 | 2,890 | 2,610 | 43 | 150 | ||
| (28) | (14) | (13) | (0.7) | ||||||
| Subtotal, Carson Range (rounded) | |||||||||
| 14,300 | 27,900 | 14,000 | 9,900 | 36 | 3,500 | ||||
| (23) | (12) | (8.3) | (2.9) | ||||||
| Subtotal Pine Nut Mountains 11e | |||||||||
| 78,200 | Buckeye Creek | 58,300 | 51,500 | 800 | 1 | 5,700 | |||
| (8.9) | (7.9) | (0.1) | (0.9) | ||||||
| Total (rounded) | |||||||||
| 92,500 | 86,200 | 65,500 | 10,700 | 12 | 9,200 | ||||
| (11) | (8.5) | (1.4) | (1.2) | ||||||
1Simulated using Fredricksburg Canyon index model because of small outcrop of metamorphic rocks near top of watershed.
U.S. Department of the Interior | U.S. Geological Survey
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