… Recently, desertification caused by overgrazing has been attracting attention, but when humans move to arid regions or when vegetation decreases due to population growth, the process of landform formation is also affected. In the western United States, overgrazing in the late 19th century caused vegetation to decrease, and rainfall runoff became faster, causing gully erosion to progress significantly, resulting in the formation of gully areas called arroyos. In some cases, livestock trails and carriage roads have also triggered the formation of arroyos. … *Some of the terminology that mentions "arroyo" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 最近過放牧などによる砂漠化が注目を集めているが,乾燥地域へ人間が新しく移動したり,人口が増大して植生が減少すると地形形成営力が影響を受ける。アメリカ合衆国西部では19世紀後半に過放牧が行われたため植生が減少し,降雨時の流失が速くなってガリ浸食が著しく進み,アロヨarroyoと呼ばれるガリが形成された。また家畜道や馬車道がアロヨの形成の引金となった場合もある。… ※「arroyo」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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