...The main stream of the Kanda River originates from the Inokashira Pond, and the Zenpukuji River originates from the Zenpukuji Pond, and their water is seepage from the gravel layer of the Musashino Plateau. The other tributaries, the Myoshoji River and the Ekoda River, also have seepage water from the valley head and cliff edge, and this water has been a source of irrigation water for the valley rice fields since ancient times. Dye factories are concentrated downstream of the Myoshoji River and along the main stream of the Kanda River, because they can obtain the same type of water from the bottom of the cliffs and have the advantage of being able to discharge factory wastewater into the river. *Some of the terminology that refers to "Ekodagawa River" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…そのうち神田川本流は井の頭池を,善福寺川は善福寺池を源流としているが,それらの水は武蔵野台地の礫(れき)層からの滲出(しんしゆつ)水である。他の支流,妙正寺川,江古田川にも同じく谷頭ならびに崖端からの滲出水があり,その水は古来谷地田の灌漑用水源であった。なお妙正寺川の下流から神田川本流沿いに染色工場が集中しているが,それは崖下から同種の水が得られ,また工場廃水を川へ流せる利点があるからである。… ※「江古田川」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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