ORCID Profile
0000-0001-8342-1916
Current Organisations
University of Technology Sydney
,
The University of Newcastle
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Physical Geography and Environmental Geoscience | Surfacewater Hydrology
Land and water management | Land and water management | Land and water management |
Publisher: IWA Publishing
Date: 12-2005
DOI: 10.2166/WH.2005.052
Abstract: Concentrations of microbiological contaminants in streams increase during rainfall-induced higher flow ‘event’ periods as compared to ‘baseflow’ conditions. If the stream feeds a drinking water reservoir, such periods of heightened pathogen loads may pose a challenge to the water treatment plant and subsequently a health concern to water consumers downstream. In order to manage this risk, it is desirable to first quantify the differences in surface water quality between baseflow and event conditions. The Event Mean Concentration (EMC) is a flow-weighted average concentration of a contaminant over the duration of a single event, proposed here as a standard parameter for quantifying the net effect of events on microbial water quality. Application of the EMC concept was assessed using flow and quality data for several events from an urbanised catchment. Expected mean EMCs were significantly larger than expected mean baseflow concentrations (p-value≤0.012) for three microbial agents - Escherichia coli (13,000 [n = 7] v. 610 [n = 16] mpn/100 ml), Cryptosporidium (234 [n = 6] v. 51 [n = 16] oocysts/10 litres) and C ylobacter (48 [n = 5] v. 2.1 [n = 16] mpn/100 ml). These parameter estimates were complemented by estimating data variability and uncertainty in the form of second-order random variables. As such the results are in a format appropriate for potential use as components in probabilistic risk assessments evaluating the effect runoff events have on drinking water quality.
Publisher: Copernicus GmbH
Date: 16-11-2020
Publisher: Copernicus GmbH
Date: 17-08-2011
DOI: 10.5194/HESSD-8-7845-2011
Abstract: Abstract. River channel change and bed scourings are source of major environmental problem for fish and aquatic habitat. The bed form such as ripples and dunes is the result of an interaction between turbulent flow structure and sediment particles at the bed. The structure of turbulent flow over ripples is important to understand initiation of sediment entrainment and its transport. The focus of this study is the measurement and analysis of the dominant bursting events and the flow structure over ripples in the bed of a channel. Two types of ripples with sinusoidal and triangular forms were tested in this study. The velocities of flow over the ripples were measured in three dimensions using an Acoustic Doppler Velocimeter with a s ling rate of 50 Hz. These velocities were measured at different points within the flow depth from the bed and at different longitudinal positions along the flume. A CCD camera was used to capture 1500 sequential images from the bed and to monitor sediment movement at different positions along the bed. Application of image processing technique enabled us to compute the number of entrained and deposited particles over the ripples. From a quadrant decomposition of instantaneous velocity fluctuations close to the bed, it was found that bursting events downstream of the second ripple, in Quadrants 1 and 3, were dominant whereas upstream of the ripple, Quadrants 2 and 4 were dominant. More importantly consideration of these results indicates that the normalized occurrence probabilities of sweep events are in phase with the bed forms whereas those of ejection event are out of phase with the bed form. Therefore entrainment would be expected to occur upstream and deposition occurs downstream of the ripple. These expectations were confirmed by measurement of entrained and deposited sediment particles from the bed. These above information can be used in practical application for rivers where restoration is required.
Publisher: CRC Press
Date: 09-06-2010
DOI: 10.1201/B10553-174
Publisher: Wiley
Date: 08-05-2014
DOI: 10.1002/IRD.1856
Publisher: Informa UK Limited
Date: 28-06-2016
Publisher: Informa UK Limited
Date: 08-1985
Publisher: AIP
Date: 2010
DOI: 10.1063/1.3527172
Publisher: Springer Science and Business Media LLC
Date: 09-01-2018
Publisher: EasyChair
Date: 2018
DOI: 10.29007/W8G4
Abstract: While previous editions of ARR have served the engineering profession well, a number of issues have necessitated the production of a new edition. These issues include the many recent developments in knowledge about flood producing processes, the increased computational capacity and data manipulation available to engineers, and the rapidly expanding body of information about climate change. There is a need, therefore, to produce a new edition of ARR. As part of the development of this new edition, it has been necessary to review the methods used and the implications of assumptions necessary for implementation of these methods. An outcome of this review has been recognition of changes in design flood estimation since development of the digital computer and the subsequent development of hydroinformatics. This has led to recasting design flood estimation as a problem in hydroinformatics. Presented herein is the background to and a discussion of this concept.
Publisher: American Society of Civil Engineers
Date: 12-05-2004
Publisher: Avestia Publishing
Date: 04-2019
DOI: 10.11159/ICGRE19.124
Publisher: Copernicus GmbH
Date: 03-03-2021
DOI: 10.5194/EGUSPHERE-EGU21-385
Abstract: & & Climate-warming greenhouse gas emissions can be reduced by replacing petroleum-driven vehicles with electric vehicles powered by rechargeable lithium batteries. By 2025, 45% of the world& #8217 s Lithium will be sourced from water-intensive mining operations adjacent to fragile eco-hydrological systems in the Atacama Desert, the world& #8217 s driest desert. In the remote Atacama salt flat basin, home to one of the world& #8217 s richest deposits of high-grade lithium, brines are being mined from aquifers, with potential impacts on the long-term environmental, ecological, economic, and social viability of the system. Stakeholders (scientists, communities, and decision-makers) are currently entrenched in adversarial relationships and top-down policy-making and implementation.& & & & A socio-hydrology stance considering telecoupled systems of people and water is essential to address the paradox between the quest for global decarbonisation and unsustainable use of water resources in the Atacama region. The inclusion of social drivers (beliefs, biases, values, and heuristics), however, adds complexity to the analysis. To address this complexity, novel methodologies such as participatory modeling (PM) and agent-based modeling (ABM) can be implemented. The former can enrich the system with specialist and local knowledge, increase the perceived utility of models, their credibility through transparent communication of the limitations and uncertainties, and the adoption and acceptance of the model results, which ultimately guide public policy. The latter seeks to represent explicitly the complexity and heterogeneity in these telecoupled systems.& & & & The socio-hydrological problem at the Atacama salt flat is conceptualized using the Fuzzy-Logic Cognitive Mapping methodology through participatory workshops, involving scientists, regulators, and government officials. An ABM is then coupled to an integrated and regional groundwater-surface water model to better understand the impacts of management scenarios and social interactions, and their feedbacks on the eco-hydrological system. Ultimately, the aim of this research is to take a socio-hydrology stance to analyze a wicked problem with social, environmental, and economic implications at the local and global scales, and in doing so, expand fundamental knowledge of socio-hydrology.& &
Publisher: Informa UK Limited
Date: 08-05-2022
Publisher: Inderscience Publishers
Date: 2007
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2009
Publisher: American Society of Civil Engineers (ASCE)
Date: 10-2006
Publisher: Informa UK Limited
Date: 11-10-2016
Publisher: American Society of Civil Engineers
Date: 21-11-2001
DOI: 10.1061/40583(275)67
Publisher: MDPI AG
Date: 13-11-2018
DOI: 10.3390/W10111641
Abstract: In the last few decades tremendous progress has been made in the use of catchment models for the analysis and understanding of hydrologic systems. A common application involves the use of these models to predict flows at catchment outputs. However, the outputs predicted by these models are often deterministic because they focused only on the most probable forecast without an explicit estimate of the associated uncertainty. This paper uses Bayesian and Generalized Likelihood Uncertainty Estimation (GLUE) approaches to estimate uncertainty in catchment modelling parameter values and uncertainty in design flow estimates. Testing of join probability of both these estimates has been conducted for a monsoon catchment in Vietnam. The paper focuses on computational efficiency and the differences in results, regardless of the philosophies and mathematical rigor of both methods. It was found that the application of GLUE and Bayesian techniques resulted in parameter values that were statistically different. The design flood quantiles estimated by the GLUE method were less scattered than those resulting from the Bayesian approach when using a closer threshold value (1 standard deviation departed from the mean). More studies are required to evaluate the impact of threshold in GLUE on design flood estimation.
Publisher: Elsevier BV
Date: 06-1994
Publisher: Informa UK Limited
Date: 07-1999
Publisher: Elsevier BV
Date: 11-2014
Publisher: Informa UK Limited
Date: 04-2010
Publisher: MDPI AG
Date: 13-10-2020
DOI: 10.20944/PREPRINTS202010.0269.V1
Abstract: Flood Management remains a major problem in many urban environments. Commonly, catchment models are used to generate the data needed for estimation of flood risk event-based and continuous-based models have been used for this purpose. Use of catchment models requires calibration and validation with a calibration metric used to assess the predicted catchment response against the recorded catchment response. In this study, a continuous model based on SWMM using the Powells Creek catchment as a case study is investigated. Calibration of the model was obtained using 25 selected events from the monitored data for the catchment. Assessment of the calibration used a normalised peak flow error. Using alternative sets of parameter values to obtain estimates of the peak flow for each of the selected events and different accuracy criteria, the best datasets for each of the accuracy criteria were identified. These datasets were used with SWMM in a continuous simulation mode to predict flow sequences for extraction of Annual Maxima Series for an At-Site Flood Frequency Analysis. From analysis of these At-Site Flood Frequency Analyses, it was concluded that the normalised peak flow error needed to be less than 10% if reliable design flood quantile estimates were to be obtained.
Publisher: Informa UK Limited
Date: 2010
Publisher: American Society of Civil Engineers
Date: 19-05-2011
Publisher: Informa UK Limited
Date: 2005
Publisher: Elsevier BV
Date: 03-2001
Publisher: Wiley
Date: 07-2021
DOI: 10.1002/HYP.14301
Abstract: Separating the effects of human activities/climate change on lotic ecosystems is one of the important components of environmental management as well as water resources maintenance. A Mann–Kendall analysis of hydro‐climatic parameters and vegetation cover (VC), calculated using normalized difference vegetation index (NDVI), during the period 1985–2014 suggested a significant decrease and increase of river flow and temperature at p 0.01, as well as an insignificant decline and increment of precipitation and VC, respectively within the arid and semi‐arid region, that is, Zilbier River basin in north‐western Iran. A separation of human activities/climate change effects on the reduction of river flow was carried out using three alternative approaches: a simple eco‐hydrological method (coupled water‐energy budget (ECH)), elasticity‐based analysis (Budyko framework (EBA)), and a process‐based watershed model based on the Soil and Water Assessment Tool (SWAT). The efficiency of these approaches was assessed over the periods 1985–1994, 1995–2014, and under five potential near‐future human activities/climate change scenarios (S1–S5) by 2030. The results indicated that the climate change impacts on river flow was more severe than those of human activities. Climate change contributed to an average of 83.6% and 77.0% reduction in river flow in the past and the realistic future scenarios (i.e., S4 and S5), respectively, while human activities accounted for 16.4% and 30%. According to our findings, despite the fact that ECH results are more in line with the SWAT model, in case of physical characterization inaccessibility, ECH and EBA (as simple descriptive and quantitative models, respectively) can be used to separate, simulate and project the impacts of human activities and climate changes on river flow.
Publisher: Informa UK Limited
Date: 04-2021
Publisher: Informa UK Limited
Date: 02-01-2017
Publisher: Springer Science and Business Media LLC
Date: 17-01-2014
Publisher: Frontiers Media SA
Date: 28-04-2020
Publisher: IWA Publishing
Date: 26-11-2019
DOI: 10.2166/NH.2019.091
Abstract: This work introduces an unprecedented flash flood that resulted in nine casualties in Shimen Valley, China, 2015. Through field survey and numerical simulation the causes of the disaster are systematically analyzed, finding that the intense storm, terrain features, and the large woody debris (LWD) played important roles. The intense storm induced fast runoff and, in turn, high discharges as a result of the steep catchment surfaces and channels. The flood flushed LWD and boulders downstream until blockage occurred in a contraction section, forming a debris lake. When the debris dam broke, a dam break wave rapidly propagated to the valley mouth, washing people away. After considering the disaster-inducing factors, measures for preventing similar floods are proposed. The analysis presented herein should help others manage flash floods in mountain areas.
Publisher: Informa UK Limited
Date: 2014
Publisher: IWA Publishing
Date: 03-2022
Abstract: Throughout the world, the likelihood of floods and managing the associated risk are a concern to many catchment managers and the population residing in those catchments. Catchment modelling is a popular approach to predicting the design flood quantiles of a catchment with complex spatial characteristics and limited monitoring data to obtain the necessary information for preparing the flood risk management plan. As an important indicator of urbanisation, land use land cover (LULC) plays a critical role in catchment parameterisation and modelling the rainfall–runoff process. Digitising LULC from remote sensing imagery of urban catchment is becoming increasingly difficult and time-consuming as the variability and ersity of land uses occur during urban development. In recent years, deep learning neural networks (DNNs) have achieved remarkable image classification and segmentation outcomes with the powerful capacity to process complex workflow and features, learn sophisticated relationships and produce superior results. This paper describes end-to-end data assimilation and processing path using U-net and DeepLabV3+, also proposes a novel approach integrated with the clustering algorithm MeanShift. These methods were developed to generate pixel-based LULC semantic segmentation from high-resolution satellite imagery of the Alexandria Canal catchment, Sydney, Australia, and assess the applicability of their outputs as inputs to different catchment modelling systems. A significant innovation is using the MeanShift clustering algorithm to reduce the spatial noise in the raw image and propagate it to the deep learning network to improve prediction. All three methods achieved excellent classification performance, where the MeanShift+U-net has the highest accuracy and consistency on the test imagery. The final suitability assessment illustrates that all three methods are more suitable for the parameterisation of semi-distributed modelling systems rather than the fully distributed modelling systems, where the MeanShift+U-net should be adopted for image-based impervious area extraction of urban catchment due to its superior prediction accuracy of 98.47%.
Publisher: Thomas Telford Ltd.
Date: 12-2016
Abstract: Culverts are built at locations where a waterway crosses a road or railway and creates a limitation to flow passage. Furthermore, blockage commonly occurs during flood events with accumulation of debris at the culvert inlet. The inlet blockage changes the flow structure at the outlet and may result in culvert failure. Despite this, the impacts of blockage on culvert hydraulics and downstream waterways have not received consideration in the literature. The purpose of this paper is to mitigate this deficiency by reporting on an investigation into scouring at the outlet of partially blocked culverts. Experimental tests were conducted under steady flow to investigate a relationship between the maximum scour depth, blockage ratio of the culvert and the flow characteristics. Both non-blocked and partially blocked conditions were considered. Consideration of the results obtained showed that the scoured area and maximum scour depth increased with partially blocked culverts conditions compared with equivalent non-blocked culverts.
Publisher: Elsevier BV
Date: 19-01-1998
Publisher: Copernicus GmbH
Date: 13-01-2012
Abstract: Abstract. River channel change and bed scourings are source of major environmental problem for fish and aquatic habitat. The bed form such as ripples and dunes is the result of an interaction between turbulent flow structure and sediment particles at the bed. The structure of turbulent flow over ripples is important to understand initiation of sediment entrainment and its transport. The focus of this study is the measurement and analysis of the dominant bursting events and the flow structure over ripples in the bed of a channel. Two types of ripples with sinusoidal and triangular forms were tested in this study. The velocities of flow over the ripples were measured in three dimensions using an Acoustic Doppler Velocimeter with a s ling rate of 50 Hz. These velocities were measured at different points within the flow depth from the bed and at different longitudinal positions along the flume. A CCD camera was used to capture 1500 sequential images from the bed and to monitor sediment movement at different positions along the bed. Application of image processing technique enabled us to compute the number of entrained and deposited particles over the ripples. From a quadrant decomposition of instantaneous velocity fluctuations close to the bed, it was found that bursting events downstream of the second ripple, in Quadrants 1 and 3, were dominant whereas upstream of the ripple, Quadrants 2 and 4 were dominant. More importantly consideration of these results indicates that the normalized occurrence probabilities of sweep events along the channel are in phase with the bed forms whereas those of ejection events are out of phase with the bed form. Therefore entrainment would be expected to occur upstream and deposition occurs downstream of the ripple. These expectations were confirmed by measurement of entrained and deposited sediment particles from the bed. These above information can be used in practical application for rivers where restoration is required.
Publisher: Elsevier BV
Date: 03-2002
Publisher: Scientific Research Publishing, Inc.
Date: 2010
Publisher: Thomas Telford Ltd.
Date: 10-2019
Abstract: The influence of rigid vegetation on the longitudinal dispersion coefficient in a compound open channel was examined using an image processing technique. To simulate floodplain vegetation, cylinders of 5 mm diameter were attached to the floodplain surface. Potassium permanganate solution was used as a conservative tracer. Instantaneous velocity components were measured using particle image velocimetry. The results showed that, compared with non-vegetated conditions, floodplain vegetation decreased the depth-averaged longitudinal velocity and maximum tracer concentration by up to 83% and 12·5%, respectively. It was also found that the magnitude of the longitudinal dispersion coefficient, K, increased with the relative flow depth, D r (the ratio of the floodplain to main channel flow depth). Furthermore, the value of K increased by up to 39·3% for vegetated tests compared with non-vegetated tests. Moreover, the results were compared with several previous empirical equations and the most appropriate equation for prediction of K in compound channels with partly vegetated floodplain was found to be that proposed by Fischer in 1975.
Publisher: Elsevier BV
Date: 08-2022
Publisher: IWA Publishing
Date: 03-2023
Abstract: Urban impervious surfaces, a symbol of urbanisation, have permanently changed urban hydrology behaviour and play a critical role in modelling rainfall-runoff process. The distribution pattern of impervious surfaces is intrinsically connected with functional land zoning schemes. However, estimating impervious fractions for catchment modelling is becoming increasingly difficult due to intricate land zoning categories and heterogeneous land use land cover (LULC) during urbanisation. This study demonstrates an integrated approach of deep learning (DL) and grid s ling method to overcome the challenges of LULC classification, s le standardisation and statistical s le extraction. The classified impervious features were extracted within the land zoning scope and translated into polynomial functions using a probability-fitting approach to measure the occurrence likelihood distribution of s les' impervious fraction. Then, we use the information entropy (IE) to evaluate prediction stability by quantifying the condition entropy and information gain (IG) from each functional land zones to the occurrence likelihood of different impervious fraction intervals. The DL model shows robust LULC prediction, while probability-fitting study of impervious s les reflects the distribution differential of impervious fractions under the land zoning categories. The IE stability test shows a robust approach that clarifies different confident ranges of imperviousness estimation based on land zoning information.
Publisher: Thomas Telford Ltd.
Date: 2012
DOI: 10.1680/WAMA.2012.165.1.9
Abstract: An experimental study was undertaken to optimise a 55° round-edged entrance irrigation water intake. The tests were carried out under different flow conditions in a laboratory flume with a rectangular cross-section under close-ended and open-ended flow conditions. To improve the efficiency of water intake, its entrance was rounded with three different radii (r): 100, 150 and 200 mm. Two components of flow velocity in transverse and flow directions were measured using an electromagnetic velocity meter. The flow velocity inside the water intake was measured at 390 regular grid points, across three horizontal layers at 30, 60 and 120 mm heights from the bed. The streamlines were drawn from the captured flow velocity, and hence the separation width and length were determined for the different depth levels, from the bed to the water surface. The discharge ratios (Q r ) of the main channel to the lateral channel were set equal to 0·25, 0·67, 1·5 and 4. It was found that a 55° water intake with the radius of curvature of r/W b = 0·8 produced minimum separation size. It was therefore selected as the optimum 55° round-edged entrance water intake.
Publisher: Informa UK Limited
Date: 08-09-2018
Publisher: Informa UK Limited
Date: 28-07-2021
Publisher: World Scientific Publishing Company
Date: 07-2002
Publisher: Elsevier BV
Date: 07-2017
Publisher: American Society of Civil Engineers (ASCE)
Date: 04-1998
Publisher: American Society of Civil Engineers
Date: 29-05-2014
Publisher: Elsevier BV
Date: 11-1995
Publisher: IWA Publishing
Date: 09-2006
DOI: 10.2166/WST.2006.617
Abstract: Sorption experiments were used to assess the ability of various materials (sand, compost, packing wood, ash, zeolite, recycled glass and Enviro-media) to remove heavy metal contaminants typically found in stormwater. Compost was found to have the best physicochemical properties for sorption of metal ions (Cu, Zn and Pb) compared with sand, packing wood, ash, zeolite and Enviro-media. The compost sorption of these metal ions conformed to the linear form of the Langmuir adsorption equation with the Langmuir constants (qm) for Zn(II) being 11.2 mg/g at pH 5. However, compost was also found to leach a high concentration of dissolved organic carbon (DOC, 4.31 mg/g), compared with the other tested materials. Various combinations of sand, compost and other materials were observed to have excellent heavy metal removal (75–96% of Zn and 90–93% of Cu), with minimal DOC leaching (0.0013–2.43 mg/g). The sorption efficiency of the different Enviro-media mixes showed that a combination of traditional (sand) and alternative materials can be used as an effective medium for the treatment of dissolved metal contaminants commonly found in stormwater. The application of using recycled organic materials and other waste materials (such as recycled glass) also provides added value to the products life cycle.
Publisher: Wiley
Date: 30-08-2008
DOI: 10.1002/HYP.6969
Publisher: Informa UK Limited
Date: 2003
Publisher: Informa UK Limited
Date: 15-03-2020
Publisher: Taylor & Francis
Date: 15-05-2004
Publisher: IWA Publishing
Date: 07-2007
Abstract: Successful implementation of a catchment modelling system requires careful consideration of the system calibration which involves evaluation of many spatially and temporally variable control parameters. Evaluation of spatially variable control parameters has been an issue of increasing concern arising from an increased awareness of the inappropriateness of assuming catchment averaged values. Presented herein is the application of a real-value coding genetic algorithm (GA) for evaluation of spatially variable control parameters for implementation with the Storm Water Management Model (SWMM). It was found that a real-value coding GA using multiple storms calibration was a robust search technique that was capable of identifying the most promising range of values for spatially variable control parameters. As the selection of appropriate GA operators is an important aspect of the GA efficiency, a comprehensive investigation of the GA operators in a high-dimensional search space was conducted. It was found that a uniform crossover operation was superior to both one-point and two-point crossover operations over the whole range of crossover probabilities, and the optimal uniform crossover and mutation probabilities for the complex system considered were in the range of 0.75–0.90 and 0.01–0.1, respectively.
Publisher: Springer Science and Business Media LLC
Date: 23-02-2007
Publisher: Informa UK Limited
Date: 09-1995
Publisher: CRC Press
Date: 26-11-2012
DOI: 10.1201/B15320-131
Publisher: American Chemical Society (ACS)
Date: 07-1991
DOI: 10.1021/EF00028A013
Publisher: IWA Publishing
Date: 07-2009
Publisher: Thomas Telford Ltd.
Date: 10-2018
Abstract: Previous studies indicate that local scour is a leading cause of most waterway bridge failures during flood events. Using armouring countermeasures such as riprap and gabions is a conventional way of reducing scour around bridge piers, but is very costly and time consuming. As an alternative, a flow- ersion structure is proposed that has a triangular prismatic shape with dimensions much smaller than the actual pier and should be installed upstream of the pier. To assess its performance, experiments were conducted under clear-water scour conditions. After achieving equilibrium bed conditions, the bed profile was measured and the maximum scour depth and volume of the scour hole were determined for each experimental test. The results indicated that the clear distance between the pier and the countermeasure to achieve the maximum reduction in local scour was 1·5 times the pier diameter. For this condition, the proposed countermeasure reduced the maximum scour depth by 38% and the volume of the scour hole was decreased by around 61%. To determine the influence of the countermeasure on flow field around the pier, three-dimensional velocity components were measured at grid points using a micro-acoustic Doppler velocity meter. Analysis of the results indicated that the proposed structure could change both the magnitude and direction of the velocity components upstream of the pier and consequently induce a significant reduction in local scour depth and volume around the pier.
Publisher: CRC Press
Date: 12-08-2014
DOI: 10.1201/B17133-195
Publisher: CRC Press
Date: 12-08-2014
DOI: 10.1201/B17133-197
Publisher: Informa UK Limited
Date: 04-1998
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-1991
Publisher: The International Association for Hydro-Environment Engineering and Research (IAHR)
Date: 09-2019
Publisher: Informa UK Limited
Date: 12-12-2020
Publisher: Springer Science and Business Media LLC
Date: 06-1997
DOI: 10.1007/BF02427915
Publisher: American Society of Civil Engineers
Date: 05-09-2002
Publisher: Thomas Telford Ltd.
Date: 12-2018
Abstract: Previous investigations indicate that local scouring is one of the most common causes of waterway bridge failure. The scour mechanism around bridge piers is complicated by the interaction of flow and structure. To explore the local scouring process, it is therefore essential to study the flow–structure interaction around bridge piers. Most previous studies have been based on this interaction around a single pier however, in practice, many bridges are wide and comprise a number of piers aligned in the flow direction that together support the loading. In this study, a particle image velocimetry technique was used to investigate two-dimensional flow–structure interaction around two in-line bridge piers with different spacings. Various influencing flow characteristics including turbulence intensity, turbulent kinetic energy and Reynolds stresses were calculated in different vertical planes around the bridge piers. Results indicated that the flow characteristics around two in-line bridge piers are very different than for a single pier and the spacing between two in-line piers significantly influences the flow characteristics, particularly in the rear of the piers. Furthermore, for spacing in the range of 2 ≤ L/D ≤ 3, stronger turbulence structures occurred behind pier 1 and, as a result, a higher scour depth can be expected around pier 1.
Publisher: Copernicus GmbH
Date: 12-01-2017
Publisher: Informa UK Limited
Date: 08-09-2018
Publisher: American Society of Civil Engineers
Date: 05-09-2002
Publisher: Springer Science and Business Media LLC
Date: 17-11-2022
Publisher: Elsevier BV
Date: 2000
Start Date: 2006
End Date: 12-2008
Amount: $220,000.00
Funder: Australian Research Council
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