Experiments on flood-wave propagation in compound channel

Citation
Cj. Lai et al., Experiments on flood-wave propagation in compound channel, J HYDR ENG, 126(7), 2000, pp. 492-501
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Civil Engineering
Journal title
JOURNAL OF HYDRAULIC ENGINEERING-ASCE
ISSN journal
0733-9429 → ACNP
Volume
126
Issue
7
Year of publication
2000
Pages
492 - 501
Database
ISI
SICI code
0733-9429(200007)126:7<492:EOFPIC>2.0.ZU;2-Z
Abstract
Data related to floodplain inundation by fast-rising floods are limited and needed. Eighteen data sets are provided from experiments conducted in a sy mmetrical compound channel that has a trapezoidal main channel. Three flood types were investigated: long, moderate, and short duration floods (LDF MD F, and SDF). The data include water depths, velocities, and bed shear stres ses measured in straight and meandering reaches. Data show that a flat port ion occurred in the MDF and LDF hydrographs when the floodplain was being i nundated. Flood peaks stretch exponentially along the channel and are more pronounced in the meandering reach. An SDF has the fast decay rate, followe d by MDF and LDE Overbank front speeds of the SDF and MDF can be predicted by the moving speed of a surge, with the surge height bring the difference of the bankfull depth from that of thr base flow. The tail of a synthetic h ydrograph should be modified according to the channel storage so that it ca n be used as an inflow boundary condition.