Oaso Weir - Oaso Weir

...The largest irrigation canal in the Arakawa River system in northwest Saitama Prefecture. It is also known as the Rokuseki Canal, because the headworks of six canals, Nara, Tamai, Oaso, Narita, Mishou, and Yoshimi, built up and down the Arakawa River by the Keicho era (1596-1615), were joined in 1929-39. The intake point is on the north bank of the Arakawa River, in front of Nagata in Hanazono Village, Osato County, and the canals of Mishou and Yoshimi, two of the six canals, are siphoned through the Arakawa Riverbed at Aketo in Kawamoto Village, Osato County, and directed to the opposite bank towards Osato Village.

*Some of the terminology used to refer to "Oasaoi Weir" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…埼玉県北西部，荒川水系最大の用水路。別名を六堰（ろくせき）用水というが，それは荒川岸の上下に，慶長年間(1596‐1615)までに造られていた奈良堰，玉井堰，大麻生（おおあそう）堰，成田堰，御正（みしよう）堰，吉見堰の6用水のそれぞれの頭首工を1929‐39年に合口したためである。取水地点は荒川北岸，大里郡花園村永田地先で，六堰のうち御正堰および吉見堰の両用水は，同郡川本村明戸で荒川河床をサイフォンでくぐって，対岸大里村方面に導かれている。…

※「大麻生堰」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