Journal of Hydraulic Engineering: Recent submissions
Now showing items 81-100 of 6886
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Engineered Step-Pool Sequences: Geometry, Failure Modes, and Stability
(American Society of Civil Engineers, 2025)Engineered step-pool sequences made from natural blocks to imitate the step-pool morphology of steep streams represent a nature-based alternative to concrete check dams. They potentially improve ecology and reduce construction ... -
Hydrodynamics and Length-Scale Distributions of a Random Cylinder Array
(American Society of Civil Engineers, 2025)In vegetated flows a reliable estimation of flow scales is crucial to understand and model mixing processes. This study presents velocity maps obtained using particle image velocimetry (PIV) within a cylinder array (diameters ... -
Impact of Flood Loading and Initial Conditions on Transient Seepage Analyses
(American Society of Civil Engineers, 2025)Levee seepage analysis for design often uses steady-state analyses, which produce conservative results. Transient seepage analyses are appealing because they can account for time-dependent flood loadings. Uncoupled transient ... -
Double Layer–Averaged Model of River Ice–Water Mixture Flow
(American Society of Civil Engineers, 2025)River ice–water mixture flows are commonly occurring natural phenomena that have the potential to cause serious hazards. To date, however, the interactive processes between ice and water have remained poorly understood. ... -
Strongly Coupled 2D and 3D Shallow Water Models: Theory and Verification
(American Society of Civil Engineers, 2025)We introduce a monolithic/strong, interfacial coupling formulation between two-dimensional (2D) and three-dimensional (3D) shallow water (SW) and transport models. This coupling becomes necessary in regions such as estuaries ... -
Physics-Informed Neural Network Approach for Solving the One-Dimensional Unsteady Shallow-Water Equations in Riverine Systems
(American Society of Civil Engineers, 2025)In recent years, many researchers have used machine learning approaches to bridge the relationship between big data and physics in the practical engineering field. However, the widely used machine learning models are highly ... -
Influence of Wall-Attached Vortices on the Pump Installed in the Suction Pipe of an Open Intake
(American Society of Civil Engineers, 2025)Wall-attached vortices in pump intake commonly appear and damage the stability of the whole pump station. Revealing the effects of these vortices on the pump performance is crucial for safe operation. In this paper, ... -
Experimental Study of Imbrication and Clustering of Nonspherical Particles on a Rough Bed Surface
(American Society of Civil Engineers, 2025)Imbricate structures play an important role in river stability. However, quantitative experimental studies have been rarely conducted. In this study, four types of uniform particles with different degrees of flatness were ... -
Investigating and Modeling Changes in Bed Height during the Deposition Process of a Mixed-Size Sediment
(American Society of Civil Engineers, 2025)The original concept of the active layer as envisioned by Hirano has so far been adopted and mostly utilized in studies with the caveat that the volume of the sediment bed including porosity is a conservative variable. ... -
Coherent Structure Variations in the Flow around a Square Pier with an Evolving Scour Hole
(American Society of Civil Engineers, 2025)Coherent structures play a significant role in the formation and growth of scour holes around bridge piers. The present study used large eddy simulations (LES) to investigate the variations of coherent structures at different ... -
Extended Method of Characteristics for Inverse Hydraulic Transient Modeling Using Sensor Data
(American Society of Civil Engineers, 2025)Hydraulic transient modeling is a critical tool for analyzing and managing pipeline systems. However, its practical application is often hindered by the need for precise boundary conditions and uncertainties in pipeline ... -
Stability of an Idealized Floating Carpet of Plastic Spheres in an Open Channel Flow
(American Society of Civil Engineers, 2025)Plastic debris can accumulate at hydraulic structures and waste-collection devices, leading to a so-called floating carpet formation. Understanding the accumulation of plastic debris at structures is pivotal in the prediction ... -
Influence of Water Drag and Headspace Air Pressure on Airflow in Sanitary Sewers
(American Society of Civil Engineers, 2025)Odor complaints are widely reported due to hazardous gases being released from sewer systems. Mitigating and controlling the emission of these gases is the key to a better air environment. Existing airflow system models ... -
Air Demand and Flow Patterns of Low-Level Outlets: Accounting for Wall Roughness
(American Society of Civil Engineers, 2025)Low-level outlets (LLOs) are key safety elements of high-head dams, typically consisting of a pressurized inflow controlled by a vertical sluice gate that discharges into a free-surface flow tunnel. The transition from ... -
Enhancing the Prediction Accuracy of Transient Turbulent Pressurized Pipe Flow Responses: A Comprehensive Q2D Model Incorporating Additional Local Instantaneous Accelerations
(American Society of Civil Engineers, 2025)This paper investigated transient events for unsteady pressurized pipe flow, particularly during water hammer events, to compare the efficiency of the one-dimensional (1D) modified Brunone’s model called the modified ... -
Downstream Local Scour of PKW with Different Shapes and Numbers of Flow Splitters
(American Society of Civil Engineers, 2025)The high discharge capacity of piano key weirs (PKWs), an evolved form of labyrinth weirs, necessitates downstream scour mitigation. For the first time to our best knowledge, this study examines scouring reduction employing ... -
Effects of Three Repeated Unsteady Flow Hydrographs on Sand Bed Topography and Sediment Transport in a Laboratory Flume
(American Society of Civil Engineers, 2025)Natural rivers and streams are influenced by runoff from rainfall and snowmelt, resulting in flow conditions that change over timescales that are related to the size and location of contributing watersheds. Predictive ... -
Void Fraction Distribution Downstream of Nonlinear Weirs: An Experimental Investigation Using Trapezoidal A-Type Piano Key Weirs, a Labyrinth Weir, and a Linear Weir
(American Society of Civil Engineers, 2025)This experimental study investigates the behavior of void fraction distribution downstream of nonlinear weirs. Systematic air concentration measurements were performed in a 3D array for two model pairs: (1) a piano ... -
Research on the Critical Stable Area of Air Cushion Surge Chambers in Hydropower Stations
(American Society of Civil Engineers, 2025)The Svee formula plays a crucial role in assessing the stability of hydropower systems with an air cushion surge chamber (ACSC). This formula is derived from the Thoma formula, a stability criterion for the common open-surge ... -
Discharge Characteristics of Semicylindrical-Edged Vertical Sluice Gates
(American Society of Civil Engineers, 2025)Sluice gates are used in open channels, such as irrigation canals, as an undershot structure for letting out controlled discharges and regulating the upstream water level. This necessitates a precise estimation of the ...