菅平大明神沢の毒水について

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書誌事項

タイトル別名
  • THE POISIONOUS ACID WATER OF DAIMYOJINZAWA
  • スガダイラ ダイ ミョウジン サワ ノ ドクミズ ニ ツイテ

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説明

The Daimyojinzawa flows frozen the water shed of Mounts, Neko and Azuma and run southward to join the Tikuma River at the city of Ueda. It is a short stream only 5 Kilometers in length and its waters contain, a poisonous acid. The acid. contents originate from a sulphery mine located at the source of the river. The writer examined the tem-nperat;i.re of the water, its hydrogen ion concentration, and the its amount of discharge at several stations. (Fig. 1, Tab. 1) Analyses of some ingredients were made at 5 Points by taking water samples (Tab. 2). As a result of these observations, the following conclusions were reached:<br> (1) The acid cotent of the water is increasing due to prospectingat at the sulphur mine.<br> (2) Although. it is believed that the acid content increases during low water season and decreases, at high water season, it also increases at some high water periodes such as the snow-melting season.<br> (3) The acid content will increase further when mining is resumed

収録刊行物

  • 地理学評論

    地理学評論 27 (2), 84-87, 1954

    公益社団法人 日本地理学会

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