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为研究解决三峡水库支流库湾水环境问题,必须探明三峡水库支流库湾的水动力过程.基于2008年的野外观测数据,对香溪河库湾水流速度、水温、浊度、水位、流量等因子进行分析.结果表明香溪河库湾水动力特性难以简单概化为一维特征,而在深度上具有分层异向流动特征.支流上游来水主要以顺坡底部异重流形式流出库湾;干支流水体密度差的变化及水位变动带来干支流水体处于频繁的交换状态,水库干流水体主要以倒灌异重流形式进入库湾.香溪河库湾异重流主要由水体之间的温差和浊度差引起,其中温差是主要原因.倒灌异重流潜入点深度主要决定于干支流水体密度差;潜入点异重流厚度主要受水库干支流水体密度差及水位高低影响;潜入库湾的距离主要受支流上游来流量、水位高低及水位日变幅影响.
In order to study and solve the water environment problem in the tributary bay of the Three Gorges Reservoir, it is necessary to find out the hydrodynamic process of the tributary bay of the Three Gorges Reservoir.Based on the field observation data of 2008, the water velocity, water temperature, turbidity, water level, Etc. The results show that it is difficult to simply summarize the hydrodynamic characteristics of Xiangxi Bay Reservoir into a one-dimensional feature and to stratify the heterogeneous flow characteristics in the depth. The change of water density difference between dry and branch streams and the change of water level bring the dry and tributary water bodies to exchange frequently, and the main stream of reservoir water flows into reservoir bay mainly in the form of heavy flow of inverted irrigation. The heavy flow in Xiangxi River Bay mainly consists of water body The difference of temperature and turbidity between them is the main reason, and the depth of the inflow point is mainly determined by the difference of water density between dry and tributaries. The thickness of the diversion stream is mainly affected by the density of water body and the level of water level. The distance to the reservoir bay is mainly affected by the flow of upstream tributaries, the level of water level and the daily amplitude of water level.