| 摘要 |
PROBLEM TO BE SOLVED: To provide a long flume with a circular opening that can not only allow fishes to refuge or take a rest but also prevent water in a curved channel from swelling, rushing out or overflowing. SOLUTION: A long flume with a circular opening to be installed at one of bank-side bottom surfaces of an open channel, which is characterized in that the part equivalent to 1/3 to 1/2 of the sectional circumference of a pipe used for the flume is cut off and opened in the longitudinal direction of the pipe. COPYRIGHT: (C)2004,JPO
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