鲍威尔湖，美国 Lake Powell on the Colorado River (© Peter Schaefer/Alamy)

鲍威尔湖，美国 Lake Powell on the Colorado River (© Peter Schaefer/Alamy)

蜿蜒曲折的人工湖泊，鲍威尔湖 Man-made, meandering Lake Powell

世界水日

鲍威尔湖是科罗拉多河上的一座人工水库，跨越犹他州和内华达州边境。19世纪60年代美国修建格伦峡谷大坝后形成了这个水库。大坝利用水力发电，但同时也因为湖面加大了水体的表面积，从而更多的水被蒸发，造成了水资源流失。2000年干旱来临时，鲍威尔湖的水位开始直线下降，到2005年时，鲍威尔湖的储水量几乎仅为1999年时的一半。人类对水资源是极度依赖的，因此联合国在1993年设立了世界水日，旨在通过教育和公益活动在政府和普通人群层面上建立起更好的用水措施。全球人口正在增长，我们每个人都必须为保护水资源和清洁水资源出一份力。

World Water Day

Lake Powell is a man-made reservoir on the Colorado River, stretching across the Utah and Nevada border. It was formed in the 1960s after the US built the Glen Canyon Dam. Though the dam creates power through hydroelectricity, it also causes water loss due to evaporation from the broader surface area of the lake. When the drought took hold around 2000, the lake's water levels began to plummet, and in 2005 it lost nearly half of its volume compared to 1999. It's important to consider our dependence on freshwater, which is why the United Nations created World Water Day in 1993. Through education and activism, they aim to create better water practices on governmental and individual levels. As our global population increases, it's crucial that we all do our part to conserve our freshwater and keep it clean.