Lake Powell's Capacity Shrinking Amid Drought, Report Finds

USA - Ekhbary News Agency

Lake Powell, the second-largest human-made reservoir in the United States, is experiencing a significant decline not only in its water level but also in its overall storage capacity, according to a recent report. Since the construction of Glen Canyon Dam in 1963, the reservoir has lost approximately 7% of its potential storage capacity. This reduction is attributed to two primary factors: an intense, multiyear drought and the accumulation of sediment. The US Geological Survey and Bureau of Reclamation report indicates an average annual loss of about 33,270 acre-feet, or 11 billion gallons, of storage capacity between 1963 and 2018. This capacity loss is caused by sediments flowing in from the Colorado and San Juan rivers, which settle at the bottom and decrease the total volume the reservoir can hold. As of recent data, Lake Powell is only about 25% full, a critical situation for a region already grappling with severe water shortages and increased wildfire risks exacerbated by the drought. NOAA drought experts predict these arid conditions are likely to persist or worsen in the coming months.

The dwindling water supply in the Colorado River Basin, which serves over 40 million people across seven Western states and Mexico, poses a profound challenge. Lake Powell, along with the nearby Lake Mead, provides essential drinking water and irrigation for numerous communities, including agricultural operations and Native American tribes. Officials emphasize the critical need for accurate scientific data, such as this report, to inform future water management strategies amid a prolonged 22-year drought and the escalating impacts of climate change. The reservoir recently dipped below the crucial 3,525-foot elevation mark, raising further alarms about water availability and the reliability of hydropower relied upon by millions.