A waterfall is generally defined as a point in a river where water flows over a steep drop that is close to or directly vertical. In 2000 Mabin specified that "The horizontal distance between the positions of the lip and 查看更多內容

Research
The geographer Andrew Goudie wrote in 2020 that waterfalls have received "surprisingly limited research." Alexander von Humboldt wrote about them in the 1820s. There is no name for the specific field of … 查看更多內容

• Goudie, Andrew S. (31 March 2020). "Waterfalls: Forms, Distribution, Processes and Rates of Recession". Quaestiones Geographicae. … 查看更多內容

Waterfalls are commonly formed in the upper course of a river where lakes flow into valleys in steep mountains.
A river sometimes flows over a large step in the rocks that may have been formed by a fault line. Waterfalls can occur along the edge of a 查看更多內容

Waterfalls are an important factor in determining the distribution of lotic organisms such as fish and aquatic invertebrates, … 查看更多內容

There are thousands of waterfalls in the world, though no exact number has been calculated. The World Waterfall Database lists 7,827 as of 2013, but this is likely incomplete; as noted by Hudson, over 90% of their listings are in North America. Many … 查看更多內容