doāb (English spelling) doab

…Because the rivers flow toward this lowest point, the river network forms a fan shape with this point as its center. The area between the rivers in the river network is called a doāb (meaning "two rivers"), and many of them are named after the rivers that flow on either side of them. A doāb consists of a long, narrow, new alluvial lowland called a beth along the river, and an older alluvial plateau called a bar behind it, which is bounded by cliffs 6 to 10 meters high. …

*Some of the terminology explanations that mention "doāb" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…この最低所に向けて諸河川が流下するため，水系網はここをかなめとする扇形を描く。水系網の河間の地がドアーブdoāb(〈二つの川〉の意)で，多くは両側を流れる河川名にちなむ名をもつ。ドアーブは河流沿いのベートbethと呼ばれる狭長な新しい沖積低地と，その背後の比高6～10mの崖によって画されるバルbarと呼ばれる古い沖積台地からなる。…

※「doāb」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