向下侵蝕又稱下切河流下切侵蝕下切,是一種河流的侵蝕作用。由於河水受重力作用,產生由高往低的動能,對河床底部進行挖蝕、磨蝕,以增加河道深度。由於河床坡度越大,流速越大,使得向下侵蝕的力道增加,故通常在河的上游進行。常見的地型有河階V型谷

參考

Wikiwand in your browser!

Seamless Wikipedia browsing. On steroids.

Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.

Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.