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Use of the Lorenz Curve to Quantify Statistical Nonuniformity of Sediment Transport Rate
Publisher: American Society of Civil Engineers
Abstract: The Lorenz curve and the Gini index are statistical tools that have been widely used to quantify nonuniformity in economics, ecology, and medicine, but have apparently not been previously applied in hydraulic engineering. ...
Discussion of “Protecting Vertical-Wall Abutments with Riprap Mattresses” by A. H. Cardoso and C. M. S. Fael
Publisher: American Society of Civil Engineers
Live-Bed Pier Scour in a Covered Flow
Publisher: American Society of Civil Engineers
Abstract: Results are presented for a novel experimental investigation of live-bed scour at a cylindrical pier in covered flow. The experimental campaign also comprehended a reference scour test in clear-water conditions. Results ...
Roughening Elements as Abutment Scour Countermeasures
Publisher: American Society of Civil Engineers
Abstract: This paper presents the results of clear-water scour experiments with a vertical-wall abutment. The upstream face of the latter was provided with roughening elements as devices to intercept the downflow responsible for the ...
Celerity and Height of Aggradation Fronts in Gravel-Bed Laboratory Channel
Publisher: ASCE
Abstract: We present the results of laboratory experiments specifically designed to quantify the height and migration rate of an aggrading gravel front. The experiments were performed in sediment feed mode with constant water and ...
Clear Water Scour at Circular Piers: A New Formula Fitting Laboratory Data with Less Than 25% Deviation
Publisher: ASCE
Abstract: In this paper, we propose a new predictor for the time-dependent, spatially-maximum scour depth at a circular pier in clear-water flow conditions. In spite of a number of approaches used in scour research, a simple predictor ...
Sediment Kinematics in Abutment Scour
Publisher: American Society of Civil Engineers
Abstract: This paper presents the results of a clear-water scour experiment where the sediment kinematics around a rectangular abutment was measured at various evolution stages of the erosion process. Sediment activity was quantified ...
Constriction Effects in Clear-Water Scour at Abutments
Publisher: American Society of Civil Engineers
Abstract: The erosion process at a bridge abutment may be affected by the flow constriction when the abutment occupies a significant part of the flume width. We devised a specific experimental campaign to investigate the effect of ...
Temporal Scales for Live-Bed Scour at Abutments
Publisher: American Society of Civil Engineers
Abstract: Live-bed scour at a vertical-wall abutment is experimentally investigated with specific attention paid to the conceptual issues concerning the temporal development of local scour phenomenon. First explored are the time ...
Hydraulic Design and Preliminary Performance Evaluation of Countermeasure against Debris Accumulation and Resulting Local Pier Scour on River Po in Italy
Publisher: American Society of Civil Engineers
Abstract: This paper presents a protection structure built for a bridge pier consisting of six narrow piles. Accumulation of large woody debris upstream of the pile group during high-flow terms might have induced much larger scour ...
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