stream piracy

… As a result of selective erosion, straight fault line valleys such as the Yoshino River, Kinokawa River, and Kushida River are formed, as well as tectonic valleys such as anticline, syncline, and synclinal valleys that run parallel to the folds of the Appalachian Mountains. There is also the phenomenon of stream piracy, in which a valley with active head erosion incorporates part of an adjacent drainage basin into its own. As river systems gradually develop and densely cover the earth's surface, it is safe to say that stream piracy occurs everywhere. …

*Some of the terminology that mentions "stream piracy" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…　選択浸食の結果，例えば吉野川，紀ノ川，櫛田川のように一直線状に並ぶ断層線谷を生じたり，アパラチア山地の褶曲構造に並走してみられる背斜谷，向斜谷，同斜谷などのような構造谷を生ずる。また谷頭浸食の旺盛な谷が隣接の流域の一部を自己の流域に組み入れてしまうような〈河川争奪stream piracy〉現象がある。水系がしだいに発達して密に地表を覆う過程では，河川争奪は随所に行われるとみてよい。…

※「stream piracy」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報