本文使用雁田隧洞实测的水文资料对其设计糙率进行检定,分析影响糙率的主要因素,建立相应的水位～流量关系供实际应用。 In this paper, the hydrological data measured in the Yantian Tunnel were used to test the designed roughness, and the main factors affecting the roughness were analyzed. The corresponding relationship between water level and flow rate was established for practical application.