Hydropower - Environmental Impacts of Renewable Energy - page 154

TABLE 4.5
Evaporation from Lake Mead at Four Floating Instrumented Platforms, Arizona and Nevada, 1999-1999

Month

Site Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Total Monthly Evaporation, 1997 (inches)

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 (inches)

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 (inches)

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 (inches)

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 (inches)

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

Source: USGS, Estimating Evaporation from Lake Mead , U.S. Geological Survey, Washington, DC, 2006 (http://pubs.usgs.gov/sir/2006/5252/section3.html).