摘要
通过对室内外高含沙水流阻力特性的综合分析,考虑到野外实测高含沙水流的流速偏小、水深在断面上分布不均匀对综合阻力值的影响,在同样的条件下,高含沙水流与低含沙水流的水深与流速间的关系相同,因此,可用曼宁公式进行高含沙水流水力计算,其n值的选取主要取决于河床条件,可与清水相同。文中还给出了控制不进入层流区的计算方法及计算实例。
In result of overall examination of the hydraulic resistance characteristics of the hyper-concentration flow in laboratory as well as in field, in process of which is considered the errow in flow measurement in field condition and the influnce of the ununiform distribution of water depth along a cross section on the resistance parameter, it is crear that the relationship between depth and velocity of the hyper-concentration flow is to be the same as of lowsediment laden flow under the same condition. So, if Manning formula is used in hydraulic calculation for the hypersediment laden flow, the value of n can be chosen likely as for nosediment laden flow. In this paper is also given a calculation method, in which a prevention from entering the limilar flow is provided, as well as an example.
出处
《人民黄河》
CAS
北大核心
1991年第3期16-22,共7页
Yellow River
基金
黄河水沙变化基金
