Hydraulic action

Japanese: hydraulic action(英語表記)hydraulicaction
Hydraulic action


[River erosion]
Erosion by flowing water, or rivers, is the most common erosion process in humid regions, resulting in river valleys such as canyons or V-shaped valleys. There are two types of erosion: hydraulic action, in which the water itself cuts the bedrock, creating a pool just below a waterfall; corrasion, in which the river water cuts the riverbed using the gravel it carries as material; and finally, corrosion, in which some rocks dissolve when they come into contact with the river water. Dissolution is most noticeable in limestone regions and in the tropics.

*Some of the terminology that mentions "hydraulic action" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:


[河食]
 流水つまり河の浸食(河食作用)は湿潤地域においては最も一般的な浸食営力で,その結果,峡谷またはV字谷などの河谷(河食谷)を生ずる。滝の直下に滝壺を生ずるような水体そのものが岩盤を削る水食作用hydraulic actionと河水が運搬中の砂礫を材料にして河床を削る削磨作用corrasionと,さらに岩石によっては河水と接触して溶解する溶食作用corrosionが営まれる。溶食は石灰岩地域や熱帯に顕著である。…

※「hydraulic action」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

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