Arai weir (Shonai River)

Japanese: 洗堰(庄内川) - あらいぜき
Arai weir (Shonai River)

…From Kasugai City to the river mouth, the river has become an open-air river, and in the past it often flooded. For this reason, the Owari clan built a wash dam (completed in 1787) on the right bank and released water into the Shinkawa River to protect the area around Nagoya Castle from flooding. The river is also known as one of Japan's most cloudy rivers, which is due to the fact that the geology of the river basin is prone to weathering, and that raw materials for ceramics are mined and washed in the upper reaches. …

*Some of the terminology that refers to "Arai Weir (Shonai River)" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…春日井市から河口近くまでは天井川化しており,過去にはしばしばはんらんが起こった。そのため尾張藩は右岸に洗堰(1787完成)を設け,新川へ放流するなどして名古屋城下を水害から守った。また日本有数の白濁河川としても知られているが,これは流域の地質が風化しやすいのに加えて,上流域で陶磁器原料の採掘,洗浄がなされていることによる。…

※「洗堰(庄内川)」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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