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长江上游宜宾至宜昌河段,通常称为川江,全长1,030公里,宜昌以上流域面积100万公里~2,多年平均流量14,300米~3/秒,多年平均径流量4,510亿米~3/秒,本河段总落差220米,初步规划可装机近2,000万千瓦,年发电量1,025亿度,是我国巨大的能源宝库之一。由宜宾至奉节,长江干流穿过四川盆地,两岸丘陵与平原占地相间,束窄段和开阔段交替出现,有良好的水电枢纽坝址。特别是奉节至宜昌河段,是著名的三峡河谷段,两
The Yichang-Yichang section of the upper reaches of the Yangtze River, commonly known as Chuanjiang, has a total length of 1,030 km and an area above Yichang reaches 1 million km 2. Its annual average flow rate is 14,300 m 3 / s and its annual average runoff is 4,510 billion m 3 / s. The total drop of this section of 220 meters, the initial plan can be installed nearly 20 million kilowatts, the annual generating capacity of 102.5 billion degrees, is one of China’s huge treasure house of energy. From Yibin to Fengjie, the mainstream of the Yangtze River flows through the Sichuan Basin. The hills and plains on both sides of the Taiwan Strait occupy the same area with alternate sections of narrow and open sections, and have good hydropower hub sites. Especially Fengjie to Yichang reach, is the famous Three Gorges Valley section, two