Journal of Hydraulic Engineering: Recent submissions
Now showing items 181-200 of 6886
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Boussinesq Modeling of Transcritical Flows over Steep Topography
(ASCE, 2024/01/01)Nonlinear shallow water equations effectively work for various fluvial hydraulic problems. However, the underlying assumption of hydrostatic pressure is violated by flows with significant vertical acceleration around steep ... -
Design of a Novel Multislot and Pool–Weir Combined Fishway Based on Hydraulic Properties Analysis and Fish-Passage Experiments
(ASCE, 2024/05/01)A brand-new type of multislot and pool–weir combined fishway (MSWF) is firstly proposed in this paper. In fact, six MSWF configurations (MSWF-1 to MSWF-6) are designed and compared, and numerical results demonstrate that ... -
3D Displacement and Axial Load of Placed Riprap Supported at the Toe: Use of Structure from Motion
(ASCE, 2024/01/01)Improving the knowledge of the failure mechanism of riprap exposed to overtopping is valuable to enhance the construction and reinforcement techniques of rockfill dam defense systems. In this research, four experimental ... -
The Effect of Bubble Size on Lock-Exchange Density Currents through Bubble Screens
(ASCE, 2024/05/01)Bubble screens are used at sea locks to mitigate salt intrusion into inland water systems. In this paper the effectiveness of a bubble screen in delaying the mixing of salt and freshwater via lock exchange was studied. ... -
Groyne-Induced Effects on Channel-Shoal Exchange and Saltwater Intrusion in Estuarine Environments
(ASCE, 2024/01/01)Existing knowledge about groyne-induced effects is primarily based on riverine or coastal environments where salinity gradients are absent or limited. However, in estuaries, salinity gradients drive physical processes such ... -
Surge Analysis of Air Vessel with Different Connection Types in Pressurized Water Delivery Systems
(ASCE, 2024/01/01)Air vessels have been commonly applied to prevent water hammer related to pump operations, but their connection types and effects have rarely been discussed. In this study, surge analysis of air vessels with three different ... -
Jet-Driven Mixing Regimes Identified in the Unsteady Isothermal Filling of Rectangular Municipal Water Storage Tanks
(ASCE, 2024/03/01)Poor mixing of old and new water in municipal water storage vessels is a well-documented basis for potentially harmful water quality degradation in drinking water distribution systems. This numerical study investigates the ... -
Characterizing the Roughness in Channel Flows Using Direct Numerical Simulations
(ASCE, 2023/11/01)Turbulent flows over bumpy walls are ubiquitous and pose a fundamental challenge to various engineering applications such as coastal boundary layers, drag on ships, hydraulic conveyance networks, and bluff body aerodynamics, ... -
Generalized, Dynamic, and Transient-Storage Form of the Preissmann Slot
(ASCE, 2023/11/01)A new formulation of the Preissmann Slot for modeling surcharged (pressurized) one-dimensional (1D) pipe flow is presented. The Dynamic Preissmann Slot (DPS) is derived in a nondimensional form where the slot is treated ... -
Discharge Estimation Using Video Recordings from Small Unoccupied Aircraft Systems
(ASCE, 2023/11/01)Measurement of river discharge during flooding events has especially been a challenging and dangerous task in the southwestern US, where flows can be flashy, laden with sediment, and at high velocity. Small unoccupied ... -
Exploration of the Circumferential Velocity Structure Induced by Guide Vane-Type Spiral Flow Generators in a Pipe Flow
(ASCE, 2023/12/01)Incorporating a guide vane-type spiral flow generator can effectively resolve particle deposition issues during long-distance pipeline conveyance. Combining model experiments and computational fluid dynamics (CFD) results ... -
Impacts of Rigid Vegetation on Gravity Currents Propagating in a Stratified Environment
(ASCE, 2023/12/01)In the stratified environment, systematic experiments are carried out to understand the impacts of rigid vegetation on the evolution of lock–release gravity currents, including the propagation process and entrainment ... -
Effects of Air Vent Size and Location Design on Air Supply Efficiency in Flood Discharge Tunnel Operations
(ASCE, 2023/12/01)Low-level outlets are essential flood discharge structures for high-head dams. High-speed free-surface flows releasing into tunnels lead to substantial air discharge, and the air supply is important for gate vibration ... -
A Surrogate Model for Shallow Water Equations Solvers with Deep Learning
(ASCE, 2023/11/01)Physics-based models (PBMs), such as shallow water equations (SWEs) solvers, have been widely used in flood simulation and river hydraulics analysis. However, they are usually computationally expensive and unsuitable for ... -
Method for Estimating Clear-Water Local Scour Rate at Complex Piers
(ASCE, 7/27/2023 )When estimating design local scour depths at structures where the design flows have short durations, equilibrium scour depths can be too conservative. Attempts to develop methods to accurately estimate scour rates and times ... -
A Random Choice Scheme for Transient Mixed Flows
(ASCE, 6/5/2023 1)A novel numerical model for describing highly transient mixed flows is presented based on the Preissmann slot approach. To overcome the spurious oscillation problems caused by this approach, a numerical scheme named “random ... -
Experimental Investigation on Reservoir Sediment Flushing through a Bottom Tunnel with an Initially Covered Intake
(ASCE, 5/17/2023 )Reservoir sedimentation is of worldwide concern, involving not only reservoir benefits, but environmental and ecological issues. Sediment flushing is one of the most common and effective methods for alleviating sedimentation ... -
Turbulent Shear Flow over a Downstream-Skewed Wavy Bed: Analytical Model Based on the RANS Equations with Boussinesq Approximation
(ASCE, 6/19/2023 )This study presents an analytical model of a steady turbulent flow over a two-dimensional downstream-skewed wavy bed of small amplitude. The mathematical framework rests on the time-averaged continuity and Reynolds-averaged ... -
New Well-Balanced Path-Conservative Numerical Scheme for a Partially Relaxed Two-Layer Hydro-Sediment-Morphodynamic Model
(ASCE, 7/14/2023 )By incorporating horizontal sediment transport and bed erosion into the two-layer depth-averaged shallow water system, one can construct a hydro-sediment-morphodynamic mathematical model in which a variable sediment ... -
From Boussinesq-Type to Quasi-3D Models: A Comparative Analysis
(ASCE, 5/24/2023 )By comparing model results from tests of steady and oscillatory flows over a submerged bar (of interest for both riverine and marine environments), we highlight similarities and differences between a state-of-the-art ...