IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Sediment management and morphodynamics : Mechanism of amplifications of hyper-concentrated flood and criterion of its occurrence in the lower...
Mechanism of amplifications of hyper-concentrated flood and criterion of its occurrence in the lower yellow river
Author : YUANJIAN WANG(1,2), ENHUI JIANG(1)
ABSTRACT
Phenomenon of amplifications of hyper-concentrated flood occur in the Lower Yellow River (LYR) at times. This study took
the phenomenon as a result of flow instability. Derived from the analysis on the characteristic of wave equations, mechanism
and criterion of flood amplifications were explored in this paper. The results show that: if velocity of dynamic waves is greater
than that of .kinetic waves, spreading velocity back of wave will be greater than that in front, flood amplifications occur. In
the condition of clear water, the criterion of flood amplifications is Fr>1.5(Fr is the Froude Number); While for hyperconcentrated
flood, as the structural change of the resistance equation, the criterion will be changed to Fr<1. That is the
reason that flood amplifications can be observed in sediment-laden rivers like LYR.
File Size : 523,570 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Sediment management and morphodynamics
Date Published : 28/08/2015
Download Now