Abstract River dynamics and sediment transport play an important role in river bed morphology. Building a bridge pier along the alters cross‐section of causes change flow processes. These changes are mainly responsible for scour. In this paper, usage collars to reduce scour around circular piers has been investigated. The with different diameters depth positions have studied using previous data additional collected present study assess their effectiveness reducing Using wide range measured...

Slope stability is crucial in civil engineering, especially urban areas like Singapore, where heavy rainfall may result catastrophic slope failures. This study aims to evaluate the effectiveness of three rectification methods, i.e., vegetation covers, GeoBarrier Systems (GBS), and Capillary Barrier (CBS), reducing rainwater infiltration for maintaining stability. Numerical analyses were conducted using finite element seepage limit equilibrium software incorporating various soil conditions...

Computational Fluid Dynamics (CFD) represents a useful tool to study natural currents in the rivers and estuaries with erosive materials; therefore, it is always keen interest for scientists further advance it, especially when numerical model has advantages compared actual laboratory experiment terms of cost, time, restrictions on conditions physical models field collections. The present deals hydro-morphological investigation modeling group vertically stationed parallel groynes using...

During flooding, the suspended sediment transport usually experiences a wide-range of dilute to hyper-concentrated depending on local flow and ground conditions. This paper assesses distribution for variety flows. Due differences between flows, linear-power coupled model is proposed integrate these considerations. A parameterised method combining size, Rouse number, mean concentration, depth parameters has been used modelling profile. The accuracy verified against reported laboratory...

This paper reviews existing studies relating to the assessment of sediment concentration profiles within various flow conditions due their importance in representing pollutant propagation. The effects particle size, depth, and velocity were considered, as well eddy viscosity Rouse number influence on drag particle. It is also widely considered that there a minimum threshold required increase above washload. bursting effect has been investigated this review, which it presents mechanism for be...

Scouring around the bridge pier is a natural and complex phenomenon that results in failure. Failure of bridges have potential devastation public safety economic loss, which lead to political consequences environmental impacts. Therefore, it essential countermeasure scour pier. This paper studies effects four different airfoil-shaped collars (i.e., bc1 = 1.5b, bc2 2.0b, bc3 2.5b bc4 3.0b, where bc b are diameter collar pier, respectively) as countermeasure. All experiments conducted under...

Abstract Bridge pier is a common feature in hydraulic structure. Its impact to the river usually occurs group form rather than single pier, so this challenging piers-group influence towards hydraulics and turbulence needs be explored. In paper, measurements were conducted using an Acoustic doppler velocimeter (ADV) study velocities three dimensions (longitudinal, transversal, vertical). Based on experimental data, we have observed reversed depth-averaged velocity vector after each of...

Electrochemical impedance spectroscopy (EIS) is a technique used to evaluate the electrochemical behavior of metallic materials in different environments. In this study, mathematical model has been developed analyse relationship between solution resistance and concentration conductive-corrosion products (Fe2O3) corroded materials. This designed as part an experimental series use EIS tool for mapping spatial distribution corrosion by-product from bridge, order impact on properties solution....

In this paper, an analytical model that represents the streamwise velocity distribution for open channel flow with submerged flexible vegetation is studied. present vegetated modelling, whole field has been separated into two layers vertically: a layer and non-vegetated free-water layer. Within layer, analysis of mechanisms affecting water through conducted. modified log-law equation profile varying height investigated. Based on studied model, sensitivity conducted to assess influences drag...

Pier scour has been extensively studied in laboratory experiments. However, depth relationships based on data at the scale often yield unacceptable results when extended to field conditions. In this study, non-uniform gravel bed and datasets with of median size ranging from 2.7 14.25 mm were considered predict maximum equilibrium cylindrical piers. Specifically, a total 217 collected: 132 literature sources 85 study using new experiments scale, which constitute novel contribution provided by...

When using point measurement for environmental or sediment laden flows, there is well-recognised risk not having aligned measurements that causes misinterpretation of the measured velocity data. In reality, these kinds mismeasurement mainly happen due to bed orientation caused by complexity its determination in natural especially bedload rough flows. This study proposes a novel realignment method improve data benchmarking three-dimensional (3D) profile and implemented it into different sets...

To reproduce the natural flow topography in a laboratory environment, it is crucial to recapture its bed condition order ensure accurate representation. Water-worked represents state-of-the-art experimentally formed imitate natural-formed channel most rivers or streams. Recently, this technique has been intensively studied through experimental and computational approaches; however, actual influence towards near-bed as compared prepared rough well-packed bedform are still yet be investigated...

Building roofs represents a critical pathway for sediment mixing with rainwater. This study aims to explore the correlation between roof-top deposited matter in different areas of Ikorodu Local Government Area Lagos, Nigeria. The deposition rate on roof was studied 34 weeks total (i.e., 17 weekly analyses rainy season and dry season). collected by 10 inch funnel directed into 5 L container, which partially filled sterilised water. four inspected analysed. were selected based levels...

Abstract An equitable sanitation coverage promotes sustainability, economic prosperity, and public health protection. This study examined factors affecting the potential of selected countries across three income levels (Low-Income, Lower-Middle, Upper-Middle Income Countries) to meet Sustainable Development Goal 6.2 by developing a Sanitation Coverage Index (SCI). Nine were based on following sets criteria: level, population, geographical region. Twenty years (2000–2020) data extracted from...

An experiment is conducted to investigate the turbulent flow field close a wall-fastened horizontal cylinder. The evolution of analyzed by evaluating characteristics and fluid dynamics along lengthwise direction. approach velocity retards in immediate upstream area At crest level cylindrical pipe, turbulence such as Reynolds stresses intensities are attaining their peaks. Gram–Charlier (GC) series-based Hermite polynomials yield probability density functions that better match experimental...

ABSTRACT This article examines the future of rainwater recycling through a study numerous scholarly articles, research papers, and studies on collection, its advantages, potential health hazards, environmental consequences. Rainwater collecting systems have gained popularity as feasible alternatives to traditional water resources because their ability alleviate scarcity. A comprehensive search peer-reviewed journal articles from 2004 2024 was conducted using Medline, PubMed, EBSCOhost,...

This study investigated the distribution and dynamics of Turbulent Kinetic Energy (TKE) around a group three tandem piers using combination numerical simulations experimental measurements. The Volume Fluid (VOF) method, coupled with k-ε turbulence model, was implemented in ANSYS FLUENT to replicate free-surface flow conditions. An validation conducted Acoustic Doppler Velocimetry (ADV) assess model’s capability at capturing characteristics. While model effectively reproduced near-bed...

Submerged vegetation plays a crucial role in influencing flow hydrodynamics, generating turbulence, and shaping velocity distributions aquatic environments. This study investigates the hydrodynamic effects of submerged rigid vegetation, specifically focusing on local turbulence alterations resulting from removal single stem an otherwise uniform array under controlled laboratory conditions. Experiments were conducted flume using Acoustic Doppler Velocimetry (ADV) to measure 3D...