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.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 5: Environmental Hydraulics and Hydrology : Laboratory experiments on debris flows in a rectangular culvert
Laboratory experiments on debris flows in a rectangular culvert
Author : Joongcheol Paik and Youngil Kim
Debris flow is one of the most hazardous natural processes in mountainous regions. The degradation of discharge capacity of drainage facilities due to debris flow may results in damages of properties as well as casualty. Understanding and accurate reproducing flow behaviour of debris flows at various geometrical conditions, especially channel slope, is prerequisite to develop advanced design criteria for drainage facilities to prevent such damages. We carried out a series of laboratory experiments of debris flows in a rectangular channel of constant width with an abrupt change of bottom slope. The experimental flume consists of an approaching channel part with the bed slope ranging 18 to 25 and the test channel with slope ranging from 0 to 12 which mimics a typical drainage culvert. The experiments have been conducted at various flow conditions with different channel slopes and sediment volume concentration of debris flows to investigate those effects on the behaviour of debris flows. The results show that the depth of debris flow with sediment volume concentration of 0.7 is approximately 50% higher than that of fresh water flow at the same flow rate. The results also quantitatively show that variation of flow depth and features of sediment deposit in the test channel depend on the slopes of both approaching and drainage channels, sediment volume concentration and sediment material property.
File Size : 1,124,184 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 5: Environmental Hydraulics and Hydrology
Date Published : 01/07/2011
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