Experimental study of the variation of sediment erodibility under wave-loading conditions

Zheng, Jinhai; Jia, Yonggang; Liu, Xiaolei; Shan, Hongxian; Zhang, Minsheng

doi:10.1016/j.oceaneng.2013.04.010

Cited by 33 publications

(7 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a regulation structure, the spur dike plays an irreplaceable role in improving channels and maintaining rivers, but it is also an indisputable fact that the natural river flow pattern is destroyed locally, the flow structure becomes more complicated, and the threedimensional turbulence property is enhanced after its construction. She et al (2016) [1] analyzed the relationship between the shape of the local scour pit at the head of the submerged spur dike, the maximum drawing depth, and the width of the bottom protection through model tests; Cai et al (2018) [2] studied the quantitative relationship between water flow force and spur dike length by combining numerical simulations and physical experiments; Kong et al (2020) [3] analyzed the influence of wave period and water depth on the sediment threshold through field tests; Ren et al (2016) [4] used a moving-bed model test to study the influence of the water permeability of the hydraulic insert on the slow flow effect, local scour, and siltation behind the dike; Xu et al (2019) [5] studied the effect of porosity and pore size on the water surface line of the permeable spur dike; Wei et al (2020) [6] analyzed the distribution laws of turbulent kinetic energy and the turbulent kinetic energy budget through the experiment of a low Freud number in a narrow flume; Zhong et al (2020) [7] studied the turbulent flow characteristics of open channels with dense-row rough-bed surfaces through turbulent PIV flow field test data; Wang et al (2020) [8] analyzed the distribution of turbulent strength, Reynolds stress, and turbulent kinetic energy in the wide and narrow channels by a generalized model test in a laboratory; Pang et al (2020) [9] analyzed the tradeoff among turbulent kinetic energy, and wave and suspended matter deposition through a field observation; Puzdrowska and Heese (2019) [10] analyzed the turbulent kinetic energy in a bolted fishway and found differences in velocity and turbulent kinetic energy distribution; Gao et al (2007) [11] studied the distribution law of flow kinetic energy around a spur dike by means of a flume test and theoretical analysis; and Kumar and Ojha (2019) [12] studied the turbulent characteristics of a non-submerged hook spur dike through a model test, and obtained the relationship between turbulent kinetic energy and the bed shear stress. By means of a model test and theoretical analysis, the authors studied the hydraulic characteristics of the super dike, the influential factors of turbulence, and the distribution of tu...…”

Section: Introductionmentioning

confidence: 99%

Turbulent Kinetic Energy Distribution around Experimental Permeable Spur Dike

Yun

Wang

et al. 2022

Sustainability

View full text Add to dashboard Cite

The spur dike is widely used in the waterway renovation project in the upper reaches of the Yangtze River as a remediation structure, but its water destruction is very common, and the influence of the permeable characteristics of the riprap spur dike on its stability has been neglected in many studies. Through the method of combining a generalized flume test and theoretical analysis, the influence of the submerged degree of the permeable spur dike, the porosity of the spur dike body, and the size of the void on its nearby turbulent kinetic energy is studied. The results show that the turbulent kinetic energy in the front of the spur dike increases with the increase of the submerged degree, decreases with the increase of the porosity, and first increases and then decreases with the increase of the pore size. At the axis of the dike, the turbulent kinetic energy increases with the increase of the submerged degree, decreases first and then increases with the increase of the porosity, and increases with the increase of the pore size. In the rear area of the dike, the turbulent kinetic energy decreases with the increase of the submerged degree, firstly decreases and then increases with the increase of the porosity, and first increases and then decreases with the increase of the pore size. The research results are of great significance to further understanding the water dike age of a permeable spur dike, and can provide scientific guidance for the design and restoration of spur dikes.

show abstract

Section: Introductionmentioning

confidence: 99%

Turbulent Kinetic Energy Distribution around Experimental Permeable Spur Dike

Yun

Wang

et al. 2022

Sustainability

View full text Add to dashboard Cite

show abstract

“…This problem causes a reduction of the effective reservoir storage capacity, decreases the effective lifespan of dams and lessens various reservoir functionalities [8]. Many researchers studied the effects of erosion by rainfall [15][16][17][18][19] and waves [2,[20][21][22] to predict or examine sediment yield in reservoir.…”

Section: Introductionmentioning

confidence: 99%

Estimating the Wind-Generated Wave Erosivity Potential: The Case of the Itumbiara Dam Reservoir

Vilhena

Mascarenha

Sales

et al. 2019

Water

View full text Add to dashboard Cite

The impact of wind waves is a process that affect reservoir shorelines, causing economic and environmental damage. The objective of this paper is to analyze the erosive potential of waves generated by winds at the shoreline of a large tropical reservoir of the Itumbiara Dam that stands along the Paranaiba River in the Midwest of Brazil. A GIS-based analysis was carried out using a wave fetch model tool (WAVE) developed by the US Geological Survey with wind data from a Doppler sensor (SODAR—SOnic Detection and Ranging) and an ultrasonic anemometer. A wave erosivity potential map was generated combining 16 fetch rasters from every 22.5° wind directions and was weighted according to its corresponding wind frequency over the rainy season. This result showed the critical areas which may have a high wave potential to increase sediment detachment along the reservoir shoreline. Finally, some of these high erosivity potential areas coincide with large erosions sites, which are detected by satellite imagery. This technique was capable of identifying the wave potential which can cause shoreline erosions and also contribute to reservoir management and support future works, including field experimental programs and shoreline erosion treatments.

show abstract

“…Previous research indicated that

τ_{normalc normalr}

is related to site‐specific characteristics of the sediments, including the particle grain size, density, cohesiveness, water content, and biological binding (Sanford & Maa, ). In fact, the cohesiveness, water content, and biological binding factors will be significantly changed when a consolidated seabed is transferred into a fluidized seabed (Zheng et al, ) or in the reverse process. In the other words, erodibility of a specific site also can be time varying (Maa & Kim, ; Maa & Lee, ).…”

Section: Introductionmentioning

confidence: 99%

“…However, it is a pity that the pore pressure in their study, is estimated from an empirical formula, rather than real measurements. Zheng et al () proposed an attenuation curve to describe the relationship between critical shear stress (

τ_{normalc normalr}

), critical flow speed for entrainment (

V_{normalc normalr}

), and the fluidization degree of YRD sediments. However, wave cycles were employed to indirectly indicate the various fluidization degree again, thus no parameterization formulations that are convenient for engineering calculation or numerical modeling was reported in their literature.…”

Section: Introductionmentioning

confidence: 99%

Influence of Seepage Flows on the Erodibility of Fluidized Silty Sediments: Parameterization and Mechanisms

et al. 2018

View full text Add to dashboard Cite

The influence of seabed fluidization on the erosion of cohesive sediment has been well recognized, however, quantitative parameterization works are rather difficult and remain poorly understood. Therefore, case studies are still needed to achieve better results even locally. Silty seabed in the Yellow River Delta (YRD) has been exposed to frequent fluidization and serious erosion. The present paper attempts to advance the research progress on the influence of fluidization on erosion using an annular flume and the YRD silts as a case study. Erosion coefficients are found to increase from 8.27 × 10−5 to 5.44 × 10−4 kg normalm−2 normals−1, corresponding to fluidization degrees from 0.03 to 0.96. Erodibility may increase by 6–7 times when the bottom sediments are fluidized. The significant influence is successfully parameterized into the erosion coefficient of the linear erosion formulation. Both direction and magnitude of the seepage flows dominate the erodibility of fluidized silts. Infiltration inhibits while upward seepage enhances entrainment of fluidized sediments, specifically via (a) loss of the original cohesive force between soil particles, (b) uplifting seepage forces acting onto the sediments at the water‐seabed interface, which partially offset the particle gravity, and (c) seepage pumping of fines from the interior to the surface, which enlarges the surface Shield parameter.

show abstract

Experimental study of the variation of sediment erodibility under wave-loading conditions

Cited by 33 publications

References 46 publications

Turbulent Kinetic Energy Distribution around Experimental Permeable Spur Dike

Turbulent Kinetic Energy Distribution around Experimental Permeable Spur Dike

Estimating the Wind-Generated Wave Erosivity Potential: The Case of the Itumbiara Dam Reservoir

Influence of Seepage Flows on the Erodibility of Fluidized Silty Sediments: Parameterization and Mechanisms

Contact Info

Product

Resources

About