Lake Mead Low Water Levels, Part 2 – Colorado River Inflow Variations and Trend
Claims of record low water levels at Lake Mead being related to man-made climate change, CO2 Coalition member Roy Spencer points out that the record high extraction of water for human needs is the primary culprit. Apparently, it takes a lot of water to fill swimming pools and to keep a lawn green in the desert.
- Contrary to claims that drought is causing Lake Mead water levels to fall, the Colorado River natural flows into Lake Mead show no long-term trend since 1930.
- Decadal time scale variations in river flow do occur, though, related to the Pacific Decadal Oscillation (PDO).
- Since about 2000, use of Lake Mead water has exceeded river inflow, causing water levels to drop. The negative phase of the PDO since that time has exacerbated the problem.