到了1700年，弗吉尼亚州的边境已经向西远推到了瀑布线——上游河流倾泻于大西洋从而不能通航的点。
By 1700 the Virginia frontier had been pushed as far west as the fall line-the point upstream at which the rivers emptying into the Atlantic became unnavigable.
在美国境内的瀑布只占总水量的10%，而加拿大境内的瀑布占90%.加拿大境内的瀑布由于水量更大，所以它向上游移动得更快。
The American Falls get only about 10% of the water, while the Canadian Falls get 90%. Because the volume of water is greater, the Canadian Falls are eroding far more rapidly.
近年来发电引走瀑布上游大量的水，已减低了侵蚀的速度。
Generate electricity in recent years bring the water with chute many upper reaches, already bring down erodent speed.
丘吉尔瀑布，大瀑布：落差约74.7米(245英尺)的瀑布，位于加拿大拉布拉多西南丘吉尔河上游。瀑布下有一个巨大的水电站。
A waterfall, 74.7 m (245 ft) high, of the upper Churchill River in southwest Labrador, Canada. There is an enormous hydroelectric power plant at the falls.
翠谷瀑布坐落在响水河上游，是一个封闭的峰丛洼地。
It is located in the upper reaches of the Xiangshui River, a closed peak cluster depression.
翠谷瀑布坐落在响水河上游，是一个封闭的峰丛洼地。
It is located in the upper reaches of the Xiangshui River, a closed peak cluster depression.
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