File:近辺の川筋の変化.jpg
![File:近辺の川筋の変化.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/9/97/%E8%BF%91%E8%BE%BA%E3%81%AE%E5%B7%9D%E7%AD%8B%E3%81%AE%E5%A4%89%E5%8C%96.jpg/800px-%E8%BF%91%E8%BE%BA%E3%81%AE%E5%B7%9D%E7%AD%8B%E3%81%AE%E5%A4%89%E5%8C%96.jpg?20200501231949)
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