Attenuation and phase shift in linear flood routing
作者:
ZBIGNIEWW. KUNDZEWICZ,
J.C.I. DOOGE,
期刊:
Hydrological Sciences Journal
(Taylor Available online 1989)
卷期:
Volume 34,
issue 1
页码: 21-40
ISSN:0262-6667
年代: 1989
DOI:10.1080/02626668909491306
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The necessary and sufficient conditions for non-zero phase shift and non-zero attenuation in linear flood routing can be derived from the continuity equation alone and are found to depend on the existence of an imaginary part in the expression for frequency or in the expression for wave number. It is shown that in linear flood routing the phase lag between flow rate and area of flow is directly related to the attenuation per unit wave length. The effects of using various forms of the momentum equation, in addition to the continuity equation, are exemplified by deriving analytical expressions in terms of the frequency, both for attenuation per unit channel length and for phase shift, for the kinematic wave, the general diffusion analogy, and the complete St. Venant equation.
点击下载:
PDF (1028KB)
返 回