哥伦比亚河位于太平洋西北部,流经加拿大和美国的华盛顿、俄勒冈等州,是北美洲第四大河,全长2001公里,排水区域达67万平方公里,每年平均流水量为2466亿立方米。在哥伦比亚河及其支流上,共建有210个单用途和多用途的水坝和水库,其中主要的有55个。其分布情况为:哥伦比亚河上游52个、中游28 Located in the Pacific Northwest, the Columbia River flows through Canada and the United States. Washington, Oregon and other states are the fourth largest rivers in North America, with a total length of 2001 kilometers, a drainage area of ​​670,000 square kilometers, and an average annual water flow of 2346,000 cubic meters. In the Columbia River and its tributaries, there are 210 single-purpose and multipurpose dams and reservoirs, 55 of which are the main ones. Its distribution is: 52 in the upper reaches of the Columbia River and 28 in the middle reaches.