Using the technology of delft 3d software,the orthogonal curve two-dimensional current mathematical model for the reach close to Chejiang dam site of Tugutang on Xiangjiang river was established. First the model was verified with the natural current materials, and the calculated result of model was consistent with the natural data by adjusting some parameters. Then 9 typical discharge ways of the junction were simulated on the basis of the model,and the flow velocity distribution characteristics were analyzed.The related distribution parameters for longitudinal and cross flow in approach channel and the entrance area were given. Finally,the navigation current conditions were evaluated according to Code for Master Design of Shiplocks(JTJ305-200l).%采用delft 3d技术,建立了湘江土谷塘车江坝址河段二维正交曲线水流数学模型.计算中,首先采用天然实测资料对模型进行率定,通过有关参数调整,使数值计算成果与天然实测资料达到精度要求.利用率定好的模型,模拟了湘江土谷塘航电枢纽车江坝址河段9种典型泄流方式的水流情况,分析了各泄流方式的河道流速分布特征,给出了引航道口门区和引航道内部纵向流速和横流分布及大小等通航相关参数,结合《船闸总体设计规范》(JTJ305-2001)要求,对枢纽通航水流条件进行了评定.
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