美国第二大水库鲍威尔湖在2026年9月初跌至3517.24英尺的历史最低水位,刷新了2023年4月13日创造的3519.92英尺的前纪录1。这一危机源于2025-2026年冬季山区降雪异常稀少和温暖条件,导致科罗拉多河的入流量显著减少1。鲍威尔湖危机影响范围广泛,为拉斯维加斯、凤凰城、洛杉矶和圣迭戈等地超过4000万人口提供供水1。
美国垦务局从2026年4月开始采取应急措施以稳定水位,包括从弗拉明峡谷水库释放额外水量,同时减少从鲍威尔湖向米德湖的放水1。西南地区自21世纪初以来已经历持续的特大干旱1,情况进一步恶化,米德湖也在2026年8月达到了历史最低水位1。
Lake Powell, the second-largest reservoir in the United States, dropped to a record low of 3,517.24 feet in early September 2026 1. This marked a decline below the previous record of 3,519.92 feet set on April 13, 2023 1.
The unprecedented water loss stemmed from exceptionally scarce mountain snowfall and unusually warm conditions during the 2025-2026 winter season, which significantly reduced inflows to the Colorado River 1. The crisis carries major implications for over 40 million people who depend on the Colorado River system for water supply, including residents of Las Vegas, Phoenix, Los Angeles, and San Diego 1. The southwestern region has faced a megadrought since the early 21st century 1.
In response, the U.S. Bureau of Reclamation began implementing emergency stabilization measures in April 2026, which included releasing additional water from the Flaming Gorge Reservoir while simultaneously reducing water releases from Lake Powell to Lake Mead 1. Lake Mead itself reached historic lows in August 2026 1, compounding the regional water crisis and underscoring the severity of conditions across the entire Colorado River system.
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