FRICTION FACTOR EVALUATION IN GRAVEL-BED RIVERS

被引：57

作者：

COLOSIMO, C ^{[1
]}

COPERTINO, VA ^{[1
]}

VELTRI, M ^{[1
]}

机构：

[1] UNIV BASILICATA,IST IDRAUL & COSTRUZ IDRAUL,POTENZA,ITALY

来源：

JOURNAL OF HYDRAULIC ENGINEERING-ASCE | 1988年 / 114卷 / 08期

关键词：

Froude number - Gravel - Rivers - Sediment transport - Stream flow;

D O I：

10.1061/(ASCE)0733-9429(1988)114:8(861)

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Field data gathered from 43 river reaches of Calabria (southern Italy) were employed to develop a theoretically based equation for predicting the f-friction factor that takes into account both the Froude number and the sediment mobility parameter. The river reaches investigated have: (1) Reasonably uniform and relatively low flow; (2) no appreciable vegetation in the channel bed and banks; (3) a fully developed turbulent flow; (4) a friction slope greater than 0.2%; (5) small and intermediate scale roughness; (6) a mobility parameter greater than the critical value in more than 50% of the cases; and (7) a Froude number between 0.20-1.30. Statistical techniques were used to derive an equation for estimating f that takes into account the physical processes controlling flow resistance beyond the range of the collected data. Copyright © 1988 ASCE.

引用

页码：861 / 876

页数：16

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