the upper yangtze river valley 长江上游干流区
The migration routeway of A. sinensis was cut down by the construction of Gezhouba Dam(GD) in 1981. All spawning areas of A. sinensis located in the lower Jinsha and the upper Yangtze River were no longer accessible.
1981年葛洲坝水利工程截流阻断了其洄游通道,原来分布在金沙江下游和长江上游的所有产卵场都无法被中华鲟所利用。
参考来源 - 中华鲟自然繁殖的非生物环境·2,447,543篇论文数据，部分数据来源于NoteExpress
Chongqing is an extra city in the area of the upper Yangtze River.
重庆市是长江上游地区的特大中心城市。
The Jinsha River is a main sediment source of the upper Yangtze River.
金沙江是长江上游河流泥沙的主要来源。
Gully erosion, extensively distributed and intensively developed in the Upper Yangtze River Basin, is the major sediment source of the Yangtze River.
冲沟侵蚀是我国长江上游地区最重要的侵蚀过程，是河流泥沙的主要来源。
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