漂流性鱼卵比重略大于水，需要一定的水流条件才能顺水漂流孵化。梯级电站建设改变了河流原有水文情势，对漂流性鱼卵漂流孵化产生重大影响。本项目拟以四大家鱼为例，在实验室不同流场条件下，探析漂流性鱼卵的运动特性和漂移规律，建立鱼卵在流水环境中的运动方程；以龙开口-鲁地拉梯级电站为研究区，构建三维水动力模型，根据实验推导的鱼卵运动方程在模型中定义粒子群运动规律，模拟龙开口-鲁地拉梯级电站联合调度情景下漂流性鱼卵的运动轨迹，分析不同调度情景下漂流性鱼卵在库区完成漂流孵化的可能性，提出最大程度保障漂流性鱼卵漂流孵化的梯级电站调度方案；在鲁地拉库区采用模型鱼卵进行鱼卵漂流实验，验证梯级电站联合调度对鱼卵漂流的影响及推荐方案的有效性，并通过多次野外观测，验证相关参数和方程的准确性。项目研究成果对产漂流性卵鱼类资源保护，以及水利水电工程生态调度具有重要意义。

The specific gravity of semi-buoyant eggs is slightly larger than that of water， and it needs certain current conditions to drift and hatch. Cascade hydropower development changes the original hydrological regime of the river, which will have a strong effect on the drifting and hatching of semi-buoyant eggs. Take Asian Carps as an example, the motion characteristics of semi-buoyant eggs under specific flow conditions will be systematically studied in this project, and the motion equation of fish eggs in flowing water will be established. Take Longkaikou-Ludila hydropower station as the study area, a three-dimensional hydrodynamic model will be built with Mike model. The motion law of particle swarm will be defined in the model according to the motion equation of fish eggs derived from the experiments. In this way, the trajectory of semi-buoyant eggs can be simulated, and the possibility of hatching of semi-buoyant eggs under different dispatching scenarios of Longkaikou-Ludila hydropower station can be analyzed. According to the results of the model, scheduling schemes of cascade power station will be proposed to guarantee the hatching of semi-buoyant eggs to the greatest extent. In addition, a field experiment was carried out in Ludila Reservoir using artificial eggs to further verify the effect of cascade power station on the drifting of eggs and the effectiveness of the recommended schemes. The accuracy of relevant parameters and equations can be verified through multiple field observations. The results of this study will have important significance for fish resource protection and ecological control of hydropower projects.