Arasei Weir - Araseizeki

...This branch became the new main stream in the great flood of 1889, and the old main stream (present-day Nakatsu River) that was buried under gravel became a branch. There are many irrigation canals that take water from the Yamakuni River, but the Arase Weir near Aonodomon and the Oide Weir in Nakatsu City are both Oi Weirs that irrigate the Nakatsu Plain. The former irrigates Shimogebaru, an alluvial plateau in the southern part of the Nakatsu Plain, and the latter irrigates the Okidai Plain, an alluvial lowland in the eastern part of the Nakatsu Plain. [Katsume Shinobu]. ...

*Some of the terminology used in reference to "Arasei Weir" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…この分流はさらに1889年の大洪水で新たに本流となり，砂礫に埋まった旧本流(現，中津川)が分流となった。山国川から取水する灌漑用水路は多いが，なかでも青ノ洞門近くの荒瀬井堰と中津市の大井手堰は，ともに中津平野を灌漑する大井堰で，前者は中津平野南部の洪積台地の下毛原（しもげばる）を，後者は中津平野東部の沖積低地沖代平野をうるおす。【勝目 忍】。…

※「荒瀬井堰」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