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针对三峡水库香溪河库湾水温分层所产生的水生态环境问题,建立了考虑水体表面风应力及热交换的水动力与水温相互耦合3维数学模型,根据实测定解条件,数值模拟证明了香溪河库湾水体具有季节性水温分层特征,水库调峰运行将使河口水体产生“潮汐式”往复运动,并在库湾引发潮成内波;数值模拟给出了潮成内波作用下库湾水温和流速垂向分布随时间的演化,成功捕捉到不同水深处水温波动以及水体上下层运动方向相反的交替流现象。研究成果表明内波对于水体水动力及水温分布具有显著影响,激发和利用内波,可望起到抑制水温层化、改善水体水生态环境的作用。
According to the water ecological environment problems caused by stratification of water temperature in Xiangxi Bay of the Three Gorges Reservoir, a three-dimensional mathematical model of hydrodynamic and water temperature coupling considering the surface wind stress and heat exchange was established. According to the experimental conditions and numerical simulations The water body of Xianghe River Bay has seasonal water temperature stratification, and the peak regulation operation of the reservoir will cause “tidal” reciprocation of the water body in the estuary and initiate the tidal wave into the bay of the estuary. The numerical simulation shows that the tide Under the action of internal waves, the evolution of vertical distribution of water temperature and velocity in the reservoir bay over time successfully captures the alternating flow phenomena of water temperature fluctuations at different water depths and opposite movement directions of the upper and lower water bodies. The research results show that the internal waves have a significant influence on the hydrodynamic and water temperature distributions of the water bodies, and the internal waves are stimulated and utilized. It is expected that the internal waves may play a role in restraining the water temperature stratification and improving the aquatic ecological environment.