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以韩墩引黄灌区总干渠实测糙率资料为基础，分析了糙率与流量及含沙量的关系。分析结果表明：糙率随流量的增大而减小，与含沙量没有明显的关系。渠道的尺寸取决于过渠的最大流量，而在大流量情况下，糙率较小，这是在选择设计糙率时应特别注意的。通过验证，韩墩总干渠的设计糙率较实际值偏大。［关键词］##4复合衬砌结构;;设计糙率;;实际糙率;;韩墩引黄灌区
Based on the measured roughness data of the main canal in the South Yellow River Diversion Irrigation District, the relationship between roughness and flow rate and sediment concentration was analyzed. The analysis results show that the roughness decreases with the increase of flow rate, and has no obvious relationship with sediment concentration. The size of the channel depends on the maximum flow through the canal, and in the case of large flow rate, the roughness is small, which should be paid special attention to when choosing the designed roughness. Through the verification, the design of Han dynasty trunk canal roughness is larger than the actual value. [Key words] ## 4 composite lining structure; design roughness; actual roughness ;;