葛洲坝下中华鲟产卵场卵苗输移过程的数值模拟

基于水动力学计算的基本原理,采用三维水动力模型及粒子跟踪技术,模拟了中华鲟(Acipenser sinensis)卵苗输移过程。将目前葛洲坝下中华鲟产卵场区域划分为9个子区域,将粒子赋予中华鲟卵粒特征,反演了中华鲟2009年自然繁殖卵苗沿河道输移路线和扩散过程。在划分的9个区域中,区域1、2、5为极有可能的产卵位置。模拟得到的产卵位置、卵输移路径及输移时间与实际监测情况基本一致。模拟结果显示,卵苗输移受天然河道地形和水流流场变化的影响较大。

Numerical Simulation on Transport of Eggs and Fry of Acipenser sinensis in Spawning Site in Gezhouba Reach

Based on the rudiment of hydrodynamics,three-dimensional hydrodynamic model and particle tracking technology performed,transport of eggs and fry of Acipenser sinensis in the spawning site in the reach of Gezhou Dam was simulated.The existing spawning site in the downstream area of Gezhou Dam was divided into 9 sub-areas,eggs of A.sinensis were featured as particles,and the transport and diffusion route of propagated A.sinensis fry in 2009 were simulated.Area 1,area 2 and area 5 of 9 sub-areas were spawning ones in all probability.The simulation of spawning area,route and time was similar to the results of site monitoring.The simulated result demonstrated that the transport of eggs and fry was affected by the landform of natural river courses and flow fields.