三峡水库支流库湾水流输移水华藻团能力研究

为研究水流对水华藻团的输移能力，将水华藻团概化为水体中的物质粒子，忽略其生物抗力，应用流体力学相关理论推导了水流对水华藻团的粘性阻力，并借鉴粒子在水流中的跟随性分析了不同优势种的水华藻团随水流被输移的效果。研究表明，不同的藻种由于颗粒大小不同而略有差异，但总体上跟随性很好，水流均能对其产生显著的推流输移作用。结合三峡水库香溪河库湾秋季水华过程及对应的水动力特性，以2007、2010年为例，证明汛末蓄水期间干流中层倒灌异重流引起库湾表层持续流向河口的水流趋势是秋季水华消退的直接原因之一。

Water Transport Capacity for Algal Bloom in Tributaries of Three Gorges Reservoir

To research the water transport capacity of the algae clusters, viscous resistance on the algae clusters imposed by the water flow are investigated with fluid mechanics, which the biotic resistance of the algae clusters are ignored and the algal bloom clusters are taken as matter particle in water body. Different kinds of algae clusters are selected to analyze the effect of being transported. And it is found that all can be transported away although there are differences because of different particle sizes. In terms of fall diatom bloom process as well as the corresponding hydrodynamic characteristics in Xiangxihe Bay of Three Gorges Reservoir in 2007 and 2010, it proves that persist surface water toward the estuary caused by the middle intrusion density water flow should be one of the most direct reason of the disappearance of this fall algal bloom.