河岸陡峭度对冲积河流平衡河道形态的影响  

Influences of bank steepness on the channel shape of alluvial river

作　　者：樊金生 白玉川[1] 罗秋实 黄河清[5] FAN Jin-shengg;BAI Yu-chuan;LUO Qiu-shi;HUANG He-qing(Institute for Sediment,River and Coast Engineering,Tianjin University,Tianjin 300072,China;Yellow River Engineering Consulting Co.Ltd,Zhengzhou 450003,China;Postdoctoral Workstation,Yellow River Engineering Consulting Co.Ltd,Zhengzhou 450003,China;Key Laboratory for Water Management and Water Security of the Yellow River Basin,Ministry of Water Resources(under way),Zhengzhou 450003,China;Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural resources research,Chinese Academy of Sciences,Beijing 100101,China)

机构地区：[1]天津大学河流海岸工程泥沙研究所,天津300072 [2]黄河勘测规划设计研究院有限公司,河南郑州450003 [3]黄河勘测规划设计研究院有限公司博士后工作站,河南郑州450003 [4]水利部黄河流域水治理与水安全重点实验室(筹),河南郑州450003 [5]中国科学院陆地水循环及地表过程重点实验室地理科学与资源研究所,北京100101

出　　处：《泥沙研究》2023年第3期1-6,共6页Journal of Sediment Research

基　　金：国家自然科学基金项目(51979185);国家自然科学基金项目(51879182)。

摘　　要：河岸抗冲性对河流横断面形态影响显著。以水力半径分割方法为基础,采用等腰梯形过水断面,以河岸陡峭度代表河岸的抗冲性,利用变分方法研究冲积河流达到平衡状态时,河岸抗冲性对河道横断面形态以及输沙能力的影响。研究结果表明:河岸陡峭程度减缓时,平衡河道形态变得宽浅,相反变得窄深;河岸陡峭度变化对水力几何形态关系式中的相关变量指数几乎没有影响,仅仅影响水力几何形态关系式中的系数。随着河岸陡峭度增加,河流达到平衡状态时横断面形态变得窄深,河道最大输沙率增大。There is a significant impact on the cross-section shape of the river by anti-scour ability of the riverbank.Based on the hydraulic radius segmentation method,taking isosceles trapezoid as the cross section,and the bank steepness as the anti-scour ability of bank,the variational method is used to analyze the influence by the anti-scour of bank on the cross-section shape and sediment transport capacity of the channel when the alluvial river to an equilibrium state.Results show that when the bank steepness slows down,the equilibrium channel shape becomes wide and shallow,on the contrary,it becomes narrow and deep.The change of bank steepness has little effect on the relevant variable index in the hydraulic geometric relationship,but only affects the coefficient in the hydraulic geometric relationship.During the increase of bank steepness,the cross-section shape becomes narrow and deep when the river reach equilibrium,and the maximum sediment transport rate of the river increases.

关 键 词：冲积河流 河岸抗冲性 水力半径分割 

分 类 号：TV147.1[水利工程—水力学及河流动力学]