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利用Delft3D数值模拟软件,建立三峡水库香溪河库湾z坐标系下三维水动力-水温耦合数学模型,根据2009年实测资料,通过数值模拟分析了库湾在各月的垂向和水平温度分布特征,研究了水温结构对库湾水动力的影响。结果表明,香溪河上游在枯水期垂向水温存在弱分层现象;而库湾水体在4~5月和汛期(6~8月),在距离河口18~30km范围内始终保持稳定分层,但在蓄水期(9~10月)和枯水期(11月~次年2月)仅在库湾底部存在水温分层,并给出了香溪河库湾及河口全年分层异向流动的演变过程,研究结果可为香溪河库湾水生态环境保护提供参考。
Using Delft3D numerical simulation software, the mathematical model of three-dimensional hydrodynamics-water temperature coupling in the z coordinate system of Three Gorges Reservoir Xiangxi Bay was established. Based on the measured data in 2009, the vertical and horizontal temperature distribution of the reservoir bay in each month was analyzed by numerical simulation Characteristics, the effect of water temperature structure on the hydrodynamics of the reservoir bay was studied. The results show that there is a weak stratification of the vertical water temperature in the upper reaches of Xiangxi River during the dry season. However, the water quality of the reservoir kept stable stratification within the range of 18 ~ 30km from the estuary in April ~ May and flood season (June ~ August) However, there was only temperature stratification at the bottom of the reservoir bay during the storage period (September-October) and the dry season (November-February), and the year-by-year layer-by-layer differential flow of the Xianghe Bay and the estuary The results of this study can provide reference for the protection of the water environment in Xiangxi Bay.