华东师范大学学报(自然科学版) ›› 2009, Vol. 2009 ›› Issue (3): 127-135.

• 河流与海洋 • 上一篇    下一篇

采砂深度对分汊河道影响分析

张强，张小峰   

  1. 武汉大学 水资源与水电工程科学国家重点实验室，武汉430072
  • 收稿日期:2008-11-06 修回日期:2009-02-19 出版日期:2009-05-25 发布日期:2009-05-25

Research on the effect of the sand mining depth in a braided channel

ZHANG Qiang，ZHANG Xiao-feng   

  1. State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University, Wuhan430072, China
  • Received:2008-11-06 Revised:2009-02-19 Online:2009-05-25 Published:2009-05-25

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摘要： 以长江天兴洲河段为例，应用一般曲线坐标系下的平面二维水沙数学模型进行研究，并采用实测水沙数据进行率定与验证，模拟了不同流量级下采砂深度不同分流比、水位和流速变化规律，并进一步选取2004年作为典型水沙年，对采砂后河段冲淤变化及采砂区内泥沙回淤率进行预测.模型成果可为本河段采砂的可行性和采砂规模控制提供科学依据.

关键词: 平面二维水沙数学模型, 采砂深度, 分汊河道, 分流比, 泥沙回淤, 平面二维水沙数学模型, 采砂深度, 分汊河道, 分流比, 泥沙回淤

Abstract: A 2-D horizontal model with generalized curvilinear coordinates was applied to simulate flow and sediment transports in the Tianxingzhou reach of the Yangtze River. The model was first calibrated and verified using field data. The variations in the velocity distribution and water surface level were then simulated for the conditions of different flow discharges and different depths of sand mining. The model was also used to forecast the change of the reach and the sedimentation efficiency in mining areas after sand mining through selected typical flow and sediment conditions. The results provide necessary information for quantifying effects of sand mining at different scales.

Key words: sand mining depth, braided channel, water distribution, sediment resilt, 2-D horizontal flow and sediment model, sand mining depth, braided channel, water distribution, sediment resilt

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