Journal of Hydraulic Engineering: Recent submissions
Now showing items 441-460 of 6886
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Improved Modeling of Subaerial and Subaqueous Muddy Debris Flows
(ASCE, 7/1/2020 1)In this note, a two-dimensional depth-averaged numerical model (MassFlow2D) previously developed to simulate subaerial and subaqueous muddy debris flows is further improved. The retarding effects of ambient fluid, including ... -
Velocity of Debris Flow Determined by Grain Composition
(ASCE, 8/1/2020 1)Velocity is one of the most important parameters of debris flows, and it is usually calculated using Manning formula in hydraulics, mostly ignoring the granular effects due to flow materials. This study proposes a method ... -
1935 Sella Zerbino Dam-Break Case Revisited: A New Hydrologic and Hydraulic Analysis
(ASCE, 8/1/2020 1)The Bric Zerbino and Sella Zerbino barrages dammed two branches of the Orba Valley in Italy to create the Ortiglieto reservoir and supply the Molare hydropower plant. The secondary dam, the Sella Zerbino, was erected over ... -
Numerical Modeling of Flow and Local Scour around Pipeline in Steady Currents Using Moving Mesh with Masked Elements
(ASCE, 5/1/2020 1)This work reports on a computational fluid dynamics (CFD) model for flow and local scour around a pipeline in steady currents that uses a mixed moving-mesh and fixed-grid method. It performs mesh motions for bed conforming ... -
Complex Flow Patterns in the Scheldt Estuary: Field Measurements and Validation of a Hydrodynamic Model
(ASCE, 7/1/2020 1)The morphology of the Scheldt estuary creates challenges for its different functions. Large shoals and adjacent channels with sharp bends result in challenging conditions for navigation. In order to provide estuarine ... -
Estimating the Calibration Error–Caused Bias Limit of Moving-Boat ADCP Streamflow Measurements
(ASCE, 5/1/2020 1)The bias error in moving-boat acoustic Doppler current profiler (ADCP) streamflow measurements can be separated into two classes: calibration and application. Accordingly, the total bias limit of measured discharges can ... -
Physical and Numerical Modeling of the Hydraulic Characteristics of Type-A Piano Key Weirs
(ASCE, 5/1/2020 1)Piano key weirs (PKWs) have been introduced in recent years as a hydraulically efficient and cost-effective type of spillway, and there are more than 30 PKWs under construction or already constructed globally. However, ... -
Depth-Averaged von Kármán Coefficient in Sediment-Laden Flows Using a Turbulent Kinetic Energy Balance
(ASCE, 4/1/2020 1)Precise prediction of bed shear stress (τ0) and velocity profile in open channels is critical in various applications. This paper deliberates on the depth-averaged von Kármán coefficient in sediment-laden flows based on ... -
Temporal Evolution of Clear-Water Scour Depth at Submerged Weirs
(ASCE, 3/1/2020 1)Equilibrium clear-water scour depths predicted by existing equations based on the peak flow rate of a flood hydrograph can be overly conservative for submerged weirs in mild-slope sandy rivers, because the equilibrium ... -
Residual Energy on Ski-Jump-Step and Stepped Spillways with Various Step Configurations
(ASCE, 4/1/2020 1)To better understand the effects of optimized step configurations and preaeration structure of a ski-jump-step spillway on the residual energy of skimming flows, skimming flow experiments were conducted on both ski-jump-step ... -
Revisiting Waal River Training by Historical Reconstruction
(ASCE, 5/1/2020 1)The Dutch River Waal, a branch of the Rhine, has been trained for centuries to mitigate the effects of ice-jams and improve navigation. The works, started in 1850, involved river straightening and narrowing by a series of ... -
Hydraulic Model Calibration Using Water Levels Derived from Time Series High-Resolution SAR Images
(ASCE, 4/1/2020 1)Hydraulic models require water extents (WE) and water levels (WL) for their calibration and validation. The synthetic aperture radar (SAR) has been readily used in the past to delineate water bodies and extract WL from the ... -
Evaluating Estimates of Channel Flow in a Continental-Scale Lake-Dominated Basin
(ASCE, 3/1/2020 1)Accurate estimates of continental-scale channel flows are needed to understand spatiotemporal variability in water supplies and the water balance. At regional scales, models of connecting channel flows are commonly used ... -
Analytical Solution of Shallow Water Equations for Ideal Dam-Break Flood along a Wet-Bed Slope
(ASCE, 2/1/2020 1)The existing analytical solutions of dam-break flow do not consider simultaneously the effects of wet downstream bottom and bed slope on the dam-break wave propagation. In this study, a new analytical solution for the ... -
Erodibility of Mud–Sand Bed Mixtures
(ASCE, 1/1/2020 1)The erodibility of mud–sand bed mixtures has been studied based on experiments in a flume and in a small, vertical tube placed on the bed (Eromes-tube of 100 mm diameter with rotating propeller). Two natural mud–sand ... -
Scour Concerns for Short-Span Masonry Arch Bridges
(ASCE, 2/1/2020 1)Short-span masonry arch bridges constitute a significant proportion of the existing bridge inventory in the UK, Ireland, Europe, and the northeastern United States. These historic structures are founded typically on ... -
Local Scour and Flow Characteristics around Pipeline Subjected to Vortex-Induced Vibrations
(ASCE, 1/1/2020 1)Although local scour around submarine pipelines has been extensively studied in the last few decades, understanding of the mechanism of local scour around pipelines is still in its infancy stage due to the complex nature ... -
Knowledge-Based Predictive Tools to Assess Effectiveness of Natural and Nature-Based Solutions for Coastal Restoration and Protection Planning
(ASCE, 2/1/2020 1)Predictive tools are widely used to study coastal and deltaic systems in support of basic research, planning efforts, engineering design, and the implementation of restoration or protection strategies. They have been ... -
Comparison of Fast Shallow-Water Schemes on Real-World Floods
(ASCE, 1/1/2020 1)Two-dimensional shallow-water schemes on Cartesian grids are amendable for graphics processing units and thus a convenient choice for fast flood simulations. A comparison of recent schemes and validation of important use ... -
Effects of Streamwise Ridges on Hydraulic Resistance in Open-Channel Flows
(ASCE, 1/1/2020 1)This Technical Note reports on new experiments focused on hydraulic resistance in open-channel flows over beds covered with streamwise ridges. Extensive bulk friction factor measurements, combined with particle image ...