Author(s): Yi Qin; Chao Liu; Cai Ping Jiang
Linked Author(s):
Keywords: Scouring intensity for high sediment laden flow; Maximum scour depth
Abstract: The high probability of strong river bottom erosion arising from flooding in a sediment laden river results in design buried depth becoming one of important design parameters for long distance pipeline works to safely cut through overloaded river areas. How to determine the design buried depth depends on the depth of the scour. From an engineering point of view, this paper studies the application of the scouring intensity formula given by Wang (1998) on a high sediment laden flow. It suggests replacing the particle diameter d in the formula with an equivalent grain size d′in the case, depending on the differences in character between clear water and silt water. This modification has been used to estimate scouring depth of Lo river in Shaanxi province during the flooding of July, 1999 which broke pipeline cutting through the river. The estimate is very close to the real depth of scouring.
Year: 2002