Online Encyclopedia

WATERSHED

Online Encyclopedia
Originally appearing in Volume V28, Page 386 of the 1911 Encyclopedia Britannica.
Spread the word: del.icio.us del.icio.us it!
WATERSHED, in physical geography, the line separating the headstreams tributary to two different river-systems or basins. Alternative terms are " water-parting " and " divide." The crest of a mountain ridge forms the most clearly marked water-shed; in a plain country of gentle slope (e.g. the central plain of Ireland) the watershed is often difficult to trace, as the head-waters of two different river systems may merge in marshes or lakes at the highest levels. In a mountainous country, where two streams, flowing in opposite directions but having their sources adjacent, are both gradually eroding or cutting back the land at their heads, a pass is formed. In such cases, where one stream erodes faster than the other, the stronger may ultimately " behead " the weaker, and " capture " some of its waters,. whose flow is diverted from one basin to another.
End of Article: WATERSHED
[back]
TERRITORIAL WATERS
[next]
WATERSPOUT

Additional information and Comments

There are no comments yet for this article.
» Add information or comments to this article.
Please link directly to this article:
Highlight the code below, right click and select "copy." Paste it into a website, email, or other HTML document.