A FIELD SURVEY ON FLOW CHARACTERISTICS AND ASCENDING OF FISHES IN ICE-HARBOR TYPE FISHWAY OF MITUMENAI HEADWORKS
A FIELD SURVEY ON FLOW CHARACTERISTICS AND ASCENDING OF FISHES IN ICE-HARBOR TYPE FISHWAY OF MITUMENAI HEADWORKS
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三美内渠首冰港型鱼道水流特性及鱼类上浮现场调查
DOI：
10.2208/prohe.43.989
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
N. Azuma
中科院分区：
文献类型：
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作者：
M. Izumi;A. Kudō;N. Azuma
在三都梅内江引水渠冰港式鱼道（宽3.0m，落差0.15m，坡度1/16）中，对上升鱼类及其水力特性进行了研究。观察到的上行鱼类有7种。主要鱼种中，有97.6%的日本鲮鱼、1.5%的日本脂鲤游向鱼道。在缺口溢流的情况下，鱼类主要倾向于沿缺口断面游。另一方面，在凹口上没有溢流的情况下，由于观察到鱼类沿着孔口上升，因此发现孔口执行上升路径的功能。通过对鱼道池内水流速度三维分布的研究，了解了鱼道池内有无溢流和溢流两种情况下的水力特性。
Ascending fishes and hydraulic characteristics were examined in the ice-harbor-type fishway(3.0m wide,0.15m drop,1/16 slope) of Mitumenai headworks in Mitumenai river. The ascending fishes were observed 7 species of fish. Regarding main species of fish,Japanese dace(97.6%),Japanese fatminnow(1.5%) swam up the fishway. In the case of over flow on the notch, fishes tends to path througth the notch section mainly. On the other hand ,in the case of no over flow on the notch, as it was observed that fishes ascends througth the oriffice, it was found that the oriffice performs a function as ascending path way. Hydraulic characteristics in the pool of the fishway were understood by three-dimensional distribution of velocity in the case of both over flow and no over flow on the notch.