FISH RUN-UP STRUCTURE AND WATER PASSAGE MEMBER FOR USE IN THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a fish run-up structure for efficiently constructing a fish-way allowing the natural run-up of fishes from a drainage to a rice field. SOLUTION: A plurality of water passage members 7 in a U-grooved shape are placed in stages to gradually rise from the side of the drainage 2 to the side of the rice field 3a. A joint portion 12 of the water passage member installed on the upstream side is fitted to a joint fitting portion 13 of the water passage member installed on the downstream side. A weir plate 23 for bank raising water in the water passage is detachably mounted on a portion of each water passage member on the downstream side of the water passage. An overflow portion 24 of the weir plate 23 is set to be higher enough for fishes to run up than a water level on the downstream side. COPYRIGHT: (C)2004,JPO