Clear-Water Scour at Comparatively Large Cylindrical Piers.

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Rui M. Lança (Author) Other; Cristina S. Fael (Author) Other; Rodrigo J. Maia (Author) FEUP; João P. Pêgo (Author) FEUP; António H. Cardoso (Author) Other

Journal

Title: JOURNAL OF HYDRAULIC RESEARCH

Vol. 139 No. 11

ISSN: 0022-1686

Indexing

ISI Web of Knowledge - 29 Citations

ISI Web of Science

Scopus - 50 Citations

INSPEC

COMPENDEX

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering > Hydraulic engineering

Other information

Authenticus ID: P-006-6AA

DOI: 10.1061/(ASCE)HY.1943-7900.0000788

Abstract (EN): New long-duration clear-water scour data were collected at single cylindrical piers with the objective of investigating the effect of sediment coarseness, Dp/D50 (Dp = pier diameter; D50 = median grain size) on the equilibrium scour depth and improving the scour depth time evolution modeling by making use of the exponential function suggested in the literature. Experiments were carried out for the flow intensity close to the threshold condition of initiation of sediment motion, imposing wide changes of sediment coarseness and flow shallowness, d/Dp (d = approach flow depth). The effect of sediment coarseness on the equilibrium scour depth was identified; existing predictors were modified to incorporate this effect for U/Uc approximate to 1.0; Dp/D50>approximate to 60 and d/Dp0.5; the complete characterization of a known scour depth time evolution model was achieved for U/Uc approximate to 1.0, 60<Dp/D50<500 and 0.5d/Dp5.0.

Language: English

Type (Professor's evaluation): Scientific