The Colorado River Basin provides life-preserving water for 33 million residents in seven southwestern US States and two Mexican States in this arid desert region, and electricity to surrounding areas.
Lake Powell in the Glen Canyon National Recreation Area (GCNRA), created by the Glen Canyon Dam, and Lake Mead/Lake Mead National Recreation Area (LMNRA), created by Hoover Dam, the two largest reservoirs in the US, provide flood control and a steady water supply throughout the Basin.
Cycling banner photos include Lake Powell at the dam, the San Juan Canyon arm of Lake Powell, a large houseboat in the Escalante Canyon Arm of Lake Powell, Lake Mead at the dam, the Desert Princess paddlewheeler amid huge
bathtub rings near Hoover Dam, and silt in the dried-out eastern end of Lake Mead where the Colorado enters LMNRA as it exits the Grand Canyon.
Since 1999 the southwest has been in a severe drought. Between 1999 and 2005, Lake Powell dropped 145 feet (44+ m) to 33% of capacity. July 1, 2016, Lake Mead set an all-time low, down 148 feet (45 m). This is a combined loss of nearly 11 trillion gallons of water from both lakes. During the extreme part of the drought, water was reduced to the southern California produce fields, affecting all of us with the availability of quality produce. This water year (October 1, 2016 to September 30, 2017) has been a good year. Southern California reservoirs were filled and the spring snow melt raised Lake Powell, currently 17 feet (5.2 m) higher than last year, and Lake Mead is up 7 feet (2 m). We were in a weak La Niña, which should have reduced precipitation, but instead we had the best water year in several years. The NOAA (National Oceanic and Atmospheric Administration) is predicting a La Niña again this coming winter, forecasting another bad hurricane season for next year.
The Photo Gallery provides beautiful scenery of Lakes Powell and Mead in drought with
Deposits of calcium carbonate and other hard minerals on the darker-colored surface of the sandstone is what causes this water-bleached effect which is observable when the water levels are down - dramatically during drought.
View Photos is an auto-show of the gallery photos.
Satellite Images are Lake Powell and Lake Mead NASA satellite image overlays in an auto-show that illustrate the progression of the drought. Basin Drainage has a map of the drainage of the Colorado River Basin, with maps of the drainage basins of the three largest tributaries of the Colorado - Green River, San Juan River, and Gila River. Drought Defined discusses the probem of defining a drought, ultimately deferring to the National Drought Mitigation Center at the Unversity of Nebraska/Lincoln for our definition. Drought Updates presents periodic updates with data and graphs of the lakes' elevations. Some of the photos in the gallery come from the Glen Canyon NRA (Lake Powell) and Lake Mead NRA articles, which have additional information and photos that pertain to their recreation areas.