A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
FISHWAY FOR CRAWLING FISH-SHELLFISH
PROBLEM TO BE SOLVED: To provide a fishway for crawling fish-shellfish capable of making a going-upstream condition suitable for the crawling fish-shellfish even in a river of a strong flow.SOLUTION: A flat part of an arched cross section or a polygonal cross section of a hollow cylindrical net 12 is installed while pressing to a water contact surface 5 for flowing water of a river cross-sectional structure 3, and a wet climbing space for reducing a flow is formed on the inside of the cylindrical net 12 by packing massive bodies 17 and 18 in an inside cavity of the cylindrical net 12. Desirably, a water retentive mat 14 with an uneven surface laid on the inside flat part of the cylindrical net 12 is provided. Further desirably, a mat 15 with a pore for forming a large number of continuous hollow pores 16 is laminated between an inside water retentive mat 14 of the cylindrical net 12 and the massive bodies 17 and 18.SELECTED DRAWING: Figure 1
【課題】流れの強い河川においても這行性魚介類に適した遡行条件を作り出すことができる這行性魚介類用魚道を提供する。【解決手段】河川横断構造物３の水が流れる接水面５に中空筒状ネット１２のアーチ形断面又は多角形断面の平坦部分を押し当てながら設置し，筒状ネット１２の内側の空隙に塊状体１７，１８を詰め込むことにより筒状ネット１２の内側に流れを減少させた湿潤登坂空間を形成する。好ましくは，筒状ネット１２の内側の平坦部分に敷設する凹凸表面付き保水性マット１４を設ける。更に好ましくは，筒状ネット１２の内側の保水性マット１４と塊状体１７，１８との間に多数の連続中空細孔１６が形成された細孔付きマット１５を積層する。【選択図】 図１
FISHWAY FOR CRAWLING FISH-SHELLFISH
PROBLEM TO BE SOLVED: To provide a fishway for crawling fish-shellfish capable of making a going-upstream condition suitable for the crawling fish-shellfish even in a river of a strong flow.SOLUTION: A flat part of an arched cross section or a polygonal cross section of a hollow cylindrical net 12 is installed while pressing to a water contact surface 5 for flowing water of a river cross-sectional structure 3, and a wet climbing space for reducing a flow is formed on the inside of the cylindrical net 12 by packing massive bodies 17 and 18 in an inside cavity of the cylindrical net 12. Desirably, a water retentive mat 14 with an uneven surface laid on the inside flat part of the cylindrical net 12 is provided. Further desirably, a mat 15 with a pore for forming a large number of continuous hollow pores 16 is laminated between an inside water retentive mat 14 of the cylindrical net 12 and the massive bodies 17 and 18.SELECTED DRAWING: Figure 1
【課題】流れの強い河川においても這行性魚介類に適した遡行条件を作り出すことができる這行性魚介類用魚道を提供する。【解決手段】河川横断構造物３の水が流れる接水面５に中空筒状ネット１２のアーチ形断面又は多角形断面の平坦部分を押し当てながら設置し，筒状ネット１２の内側の空隙に塊状体１７，１８を詰め込むことにより筒状ネット１２の内側に流れを減少させた湿潤登坂空間を形成する。好ましくは，筒状ネット１２の内側の平坦部分に敷設する凹凸表面付き保水性マット１４を設ける。更に好ましくは，筒状ネット１２の内側の保水性マット１４と塊状体１７，１８との間に多数の連続中空細孔１６が形成された細孔付きマット１５を積層する。【選択図】 図１
FISHWAY FOR CRAWLING FISH-SHELLFISH
這行性魚介類用魚道
SAKUSE NOBUO (author) / NAKAMURA HANAKO (author) / MOCHIOKA NORITAKA (author) / OKOSHI TETSUO (author) / FUSHIMI NAOKI (author) / KASUYA MASAAKI (author)
2016-02-04
Patent
Electronic Resource
Japanese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau