Scientific Investigations Report 2006-5252
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5252
Table 6. Total and average monthly evaporation from Lake Mead at four floating instrumented platforms, Arizona and Nevada, 1997–99.
[Evaporation data, in inches. Symbol: –, data not measured or computed]
| Site | Jan. | Feb. | Mar. | Apr. | May | June | July | Aug. | Sept. | Oct. | Nov. | Dec. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total monthly evaporation, 1997 | ||||||||||||
| Water Barge Cove | – | 5.4 | 9.1 | 7.9 | – | 10.8 | 10.8 | 9.2 | 8.3 | 7.6 | 4.1 | 2.6 |
| Sentinel Island | – | – | – | – | – | – | 9.1 | 9.1 | 8.8 | 8.7 | 6.4 | 4.6 |
| Virgin Basin | – | – | – | – | – | – | – | – | – | – | – | – |
| Overton Arm | – | – | – | – | – | – | – | – | – | – | – | – |
| Total monthly evaporation, 1998 | ||||||||||||
| Water Barge Cove | 2.9 | 3.2 | 6.6 | 8.2 | 8.9 | 10.2 | 10.1 | 8.8 | 8.5 | 6.7 | 3.7 | 2.6 |
| Sentinel Island | 3.7 | 3.6 | 7.1 | 7.4 | 9.9 | 9.4 | 10.0 | 8.9 | 8.9 | 8.5 | 7.3 | 6.0 |
| Virgin Basin | – | – | – | 8.6 | 9.7 | 9.1 | 9.9 | 8.7 | 9.7 | 7.1 | 5.9 | 4.1 |
| Overton Arm | – | – | – | – | – | – | – | – | – | – | – | – |
| Average evaporation, 1998 | ||||||||||||
| All available sites | 3.3 | 3.4 | 6.9 | 8.0 | 9.5 | 9.6 | 10.0 | 8.8 | 9.0 | 7.4 | 5.6 | 4.2 |
| Open-water sites | 3.7 | 3.6 | 7.1 | 8.0 | 9.8 | 9.2 | 9.9 | 8.8 | 9.3 | 7.8 | 6.6 | 5.0 |
| Total monthly evaporation, 1999 | ||||||||||||
| Water Barge Cove | 3.0 | 3.8 | 7.4 | 6.8 | 9.2 | 10.5 | 9.4 | 8.7 | 9.4 | 8.0 | 4.3 | 3.1 |
| Sentinel Island | 5.0 | 4.4 | 8.1 | 6.9 | 9.0 | 9.2 | 8.4 | 8.6 | 9.9 | 8.8 | 6.7 | – |
| Virgin Basin | 4.0 | 5.3 | 7.9 | 7.1 | 9.6 | 9.3 | 8.8 | 8.7 | 9.1 | 8.0 | 7.3 | 6.5 |
| Overton Arm | – | – | 7.8 | 6.9 | 9.5 | 9.5 | 9.4 | 8.6 | 9.5 | 8.7 | 7.0 | 4.1 |
| Average evaporation, 1999 | ||||||||||||
| All available sites | 4.0 | 4.5 | 7.8 | 6.9 | 9.3 | 9.6 | 9.0 | 8.6 | 9.5 | 8.4 | 6.3 | 4.5 |
| Open-water sites | 4.5 | 4.8 | 8.0 | 7.0 | 9.4 | 9.4 | 8.9 | 8.6 | 9.5 | 8.5 | 7.0 | 5.3 |
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