The Hydrologic Engineering Centre-River Analysis System (HEC-RAS), developed by the US Army Corps of Engineers, is one most known, analyzed and used model for flood mapping both in scientific literature practice. In recently released version (release 5.0.7), HEC-RAS has been enriched with novel modules, performing fully 2-D computations based on dynamic equations as well diffusion wave equations; moreover application rainfall to each cell two-dimensional domain now possible. Contrarily...

Orifice jet through a small opening or orifice into surrounding fluid exhibits intricate dynamics, encompassing the interaction of with fluid. Although dynamics simple jets has been extensively studied, there are still unresolved issues that need to be addressed. In this study, we experimentally investigated characteristics non-buoyant emerging from sharp-edged located in wall pipe constant flow rate. Specifically, examined how ratio between variable rate upstream influences not only...

An experimental campaign of 21 long-duration tests on scouring at complex piers different configurations was performed to investigate the effect pile cap thickness temporal evolution maximum scour depth and development equilibrium conditions. Two test series were with two significantly thicknesses over a wide range elevations respect expected hole approach flow depth. In addition, accuracy existing methods calculate evaluated discussed. The results show that, in general, thicker cap, deeper...

The rapid evolution of cyber threats has required the exploration innovative detection methodologies capable identifying increasingly sophisticated attack vectors. A quantum-inspired framework leveraging variational feature perturbation been introduced to enhance capabilities against obfuscated and polymorphic threats. proposed approach employed quantum circuits introduce controlled perturbations into representations, amplifying distinguishing characteristics facilitating more robust...

This study presents a comparative analysis between Smoothed Particle Hydrodynamics (SPH) and Finite Volume Methods (FVMs) in simulating highly turbulent flows, focusing on three-dimensional marine propeller jet case. The mesh-free particle-based approach the grid-based one are evaluated for their ability to resolve complex flow structures, such as tip vortices, wake dynamics, turbulence-induced instabilities. paper highlights well-established computational framework of FVM while addressing...

Characterization of turbulence in natural bed streams is one the most fascinating problems fluid dynamics. In this study, a statistical description pebble flow presented applying laws turbulence. A laboratory experiment was conducted to measure three-dimensional instantaneous velocity components over heterogeneous coarse sediments that simulated bed. The analysis reveals spectra (in Fourier space) show power-law scaling, $E(k)\sim k^{{\it\alpha}}$ , suggesting presence inertial range...

The turbulent flow in natural rough beds is a complex subject, still poorly understood despite the longstanding effort of several researchers. In present work, open-channel experiment, with pebble bed at Reynolds and Froude numbers, respectively, Re = 4.65 × 104 Fr 0.186, has been simulated using Large-Eddy Simulation (LES) technique, which wall-adapting local eddy viscosity subgrid scale closure model used presence an air-water interface to take into account effects deformation turbulence...

A ship propeller jet causes bed scouring and deposition of sediments around the scoured area. Although topography changes induced by are one main issues in a harbor, these effects relevant other contexts concerning maneuvering zone. An unexplored problem is scour waterways. In this case, still water condition, commonly accepted several research studies, not justifiable owing to effect an additional flow jet, which can induce alterations process. Thus, paper, experimental campaign on combined...

Turbulent flows on highly rough beds, such as those occurring in natural watercourses, represent a longstanding and fascinating problem of hydraulics, motivating the past few decades huge research new models turbulence. In this work, laboratory experiments are presented stream flowing heterogeneous pebble bed with varying slope. The analysis flow speed puts evidence clear inertial range, where Kolmogorov 4/5-law for streamwise velocity spatial increments holds. law is used systematic...

Flow intensity represents an important input to be investigated in the ship propeller jet scouring process maneuvering areas, waterways path, and mooring navigation channels. Although still water condition is not realistic, since it induces modifications canonical waterways, several studies were based on this assumption only a few papers focused influence of flow are present technical literature. In work, experimental campaign aimed at exploring effects related scour was carried out....

Helical structures are a hallmark of hydrodynamic turbulence, and they play key role in determining the transport diffusion properties flow. Helicity, defined by linking velocity vorticity, is, thus, primary significance, particularly systems such as propelled jet wakes. In this paper, we present novel approach for helicity based on one-dimensional filtering methods. First, test our new technique using analytical solutions numerical simulations find that model can identify high-helicity...

The present work aims at studying the turbulence structure developed over a highly rough bed in open-channel flows (OCFs) by varying relative submergence through use of three sediment sizes ranging from gravels to pebbles. second-order moments were analyzed and compared with those already observed for canonical turbulent OCFs having similar values submergence. Particular attention was paid Reynolds stresses, viscous form-induced shear stresses near region. violation Taylor hypothesis...

An experimental campaign on long-term clear-water scour at bridge piers with different configurations was performed in a laboratory to investigate the effects of countermeasures. Tests were flume movable sediment bed for an unprotected cylindrical pier, pier standard collar and bordered collar. The scoured beds equilibrium stage acquired through photogrammetry technique efficiencies tested countermeasures measured. Results showed reduction maximum depth as well hole volume respect pier....

In the present paper, average annual silting of Farneto del Principe artificial reservoir was estimated through potential erosion model (EPM) in a GIS environment over time range from 1991 to 2008. Four calculations were performed, first by giving value geo-lithological soil erodibility factor based on table proposed literature and three others using different calibration methods (geomechanical, petrographic granulometric). For each calculation, net sediment volume arriving at closing...

Bathymetry changes induced by a marine propeller jet on movable bed are crucial issue in harbors, especially the maneuvering zone. Although presence of waves is well known harbor environment, scours usually investigated under still water conditions neglecting effect wave interaction. Moreover, interaction between and can occur also mooring out harbor. For these cases, hydrodynamics jets that an open challenging problem. In this paper, jet, which induce alterations scouring, studied...