[ad_1] Key Points 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 … Continue reading Colorado River Inflow Variations and Trend « Roy Spencer, PhD