… In contrast, the lower Indus basin was originally an arid region, but the living environment has deteriorated due to subsequent drying and changes in the river course caused by sedimentation. In addition to the main river from the Himalayas in the north, the Yamuna, Sarda, Gandak, and Kosi rivers join the Ganga plain, as well as the Chambal, Betwa, and Sone rivers from the peninsula in the south. The middle reaches are covered with thick alluvial deposits and have little relief, but are divided into an alluvial lowland (Khadar) that is often flooded by floods and a higher alluvial plateau (Bhangar) that is rarely covered by water. … *Some of the terminology used to refer to the "Ganga Plain" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… これに反してインダス下流域はもともと乾燥した地域であったが,その後の乾燥化と土砂堆積による河道変遷などで居住環境が悪化した。ガンガー平野には北のヒマラヤから本流のほかヤムナー,サルダ,ガンダク,コシなどの諸河川,南の半島部からチャンバル,ベトワ,ソーンなどが合流する。中流部は厚い沖積層に覆われ起伏に乏しいが,洪水でしばしば浸水する沖積低地(カダール)とめったに水をかぶらない1段高い沖積台地(バンガール)に分かれている。… ※「ガンガー平野」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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