貊皮岭仿生态鱼道底坡和休息池水动力数值模拟

Hydrodynamic numerical simulation on bottom slope and rest pools of Mopiling nature-like fishway

根据貊皮岭仿生态鱼道工程特点以及过鱼要求,建立了鱼道池室三维紊流数学模型,论证了鱼道底坡和休息池尺度。研究结果表明:1)该鱼道隔板布置形式能够较好地满足鱼类上溯需求,推荐鱼道底坡为1/250条件下,隔墙(板)过鱼孔缝最大流速为0.90 m/s。2)不同方案休息池内均存在较大范围小流速区,可供鱼类上溯休憩。3)20 m池长方案休息池内小流速区范围较10 m池长方案有明显增加,能够更好地满足鱼类休息需求。

According to the characteristics of the Mopiling nature-like fishway project and the requirements of fish passing, a three-dimensional turbulent numerical model of fishway pools is established, and the scale of the fishway bottom slope and rest pools is demonstrated. The results show that: 1)The vertical slot layout of the fishway can meet the demand of fish upstream. When the bottom slope is 1/250,the maximum velocity of the vertical slot and the bottom hole is 0.90 m/s.2)There is a large range of small flow velocity area in rest pools of different schemes, which can be used for fish upstream rest.3)The range of small velocity areas in rest pools of 20 m pool length scheme is larger than that of 10 m pool length scheme. In addition, it can better meet the needs of fish.