永定河山峡段河北部分生态补水期间河道糙率研究  

River channel roughness during ecological water supplement in the Hebei section of the Yongding River mountain gorge reach

作　　者：唐崇熙 TANG Chongxi(Hebei Institute of Investigation&Design of Water Conservancy&Hydropwer Group Limited,Tianjin 300220,China)

机构地区：[1]河北省水利水电勘测设计研究院集团有限公司,天津300220

出　　处：《水科学与工程技术》2025年第1期6-8,共3页Water Sciences and Engineering Technology

摘　　要：山峡型河道在生态补水期间,因其河势变化急剧、过水流量较小等特点,河道水面线计算受河道糙率取值影响较大。以永定河山峡段河北部分为例,针对小流量补水工况,采用一维数学模型的方法,分析、率定不同糙率推求的水面线与实际生态补水期间水位的关系。经分析率定,当n为0.1时,计算水位与实测水位最为接近。During the period of ecological water supplement,due to the characteristics of rapid change of river regime and small water flow,the calculation of river water surface line is greatly affected by the value of river roughness.Taking the Hebei section of the Yongding River mountain gorge reach as an example,this paper analyzes and calibrates the relationship between the water surface line deduced by different roughness and the water level during the actual ecological water supplement period by using the method of one-dimensional mathematical model for the small flow water replenishment condition.After analysis and calibration,when n=0.1,the calculated water level is closest to the measured water level.

关 键 词：永定河山峡段 生态补水 糙率 

分 类 号：TV213.4[水利工程—水文学及水资源]