Seepage Flow-Stability Analysis of the Riverbank of Saigon River Due to River Water Level Fluctuation

Oya, Ayaka; Bui, Hai-Le; Hiraoka, Nobutaka; Fujimoto, Motoaki; Fukagawa, Ryoichi

doi:10.21660/2015.15.4178

Cited by 5 publications

(6 citation statements)

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“…The ubiquity of ancient astronomical instruments can be regarded as a source of information to clarify changes (rhythm, dynamics and evolution) of planetary parameters in the past [8] - [10].…”

Section: Resultsmentioning

confidence: 99%

Gnomon as Source of Information on Planet Rhythms

Paranina¹

2016

geomate

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For millennia, humans have been using the gnomon whose shadow passes the trajectory of the light source (sun or moon) as a measurement tool. With the gnomon authors prove that the ancient stone labyrinths in Northern Europe are solar calendars, sundials and compasses. Studies of cultural heritage around the world show that the majority of them might serve as orientation in space-time. According to the authors, the collection of ancient navigational facilities can be considered as ancient astronomical and geodetic network and as a record of astronomical history of the planet. For systemic analysis of this information it is necessary to create a base of paleo-astronomical data. The acquired information may be useful for studies of the history of the Earth and the history of science: the dynamics of changes of inclination of the Earth's axis, offset of the polar circles and the tropics, the characteristics of long-period rhythms of the planet, the evolution of climatic environments and the development of navigation technologies of the past. In addition, the creation of a network of solar observatories, with the technique of automatic registration shadow or a ray of light, will provide objective information on the solar-terrestrial relations and rhythms of nature

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Section: Resultsmentioning

confidence: 99%

Gnomon as Source of Information on Planet Rhythms

Paranina¹

2016

geomate

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“…Oya et al [8] conducted a seepage flow-stability analysis of the riverbank of the Saigon River due to river water level fluctuation. The researcher used PLAXIS, a commercial finite element software, to run the analyses.…”

Section: Current Pattern Of Studymentioning

confidence: 99%

Case Study on Analyses of Slope Riverbank Failure

Taha

Shariff

Ladin

2022

Modelling and Simulation in Engineering

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A slope riverbank failure is a natural event that occurs globally on each riverbank, and a drawdown event usually causes slope riverbank failure. This case study is aimed at analysing slope riverbank failures by evaluating the seepage and slope stability of the riverbank under slow and rapid drawdown. The riverbank in this case study is located at KM 3.49, Jalan Pantai Luagan in the Sipitang district (N 4° 59 ′ 12.9 ″ E 115° 31 ′ 13.3 ″ ). A literature review was conducted to view the current study pattern and retrieve a methodology based on the current study pattern. GeoStudio is a commercial finite element software. The data obtained from the borehole log report and online resources were utilised to create the riverbank model in software. The phreatic line shows a slow change over time, indicating that the riverbank takes a long time to stabilise after the drawdown. The FOS value decreases during the drawdown occurrence and slowly increases after the drawdown has ended. In conclusion, the drawdown event can cause slope riverbank failure, and the seepage and stability analysis using GeoStudio can show the condition of the riverbank during the drawdown event.

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“…Some riverbank erosion studies incorporate soil properties characteristics to enhance the analysis results such as the effect of seepage behavior due to water fluctuations on riverbank stability [11]. There are substantial differences between the effects of soil parameters towards erodibility of cohesive and noncohesive soils [12] where the erodibility of cohesive soils are influenced by grain size distribution, bulk density, clay type and clay content, organic matter content, and pore and water chemistry [11]. Reference [13] stated that the soil properties shown to be most important in noncohesive soils erosion, which is controlled primarily by gravitational forces, grain size distribution, grain shape, and particle density.…”

Section: Fig 2 Post Jed Test Soil Conditionmentioning

confidence: 99%

ESTABLISHMENT OF JET INDEX Ji FOR SOIL ERODIBILITY COEFFICIENTS USING JET EROSION DEVICE (JEd)

Ibrahim

Abdullah

Hashim

et al. 2017

GEOMATE

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Soil erodibility has been identified as one of the major factors that govern threshold of resistance to erosion. Accurate measurement of soil erodibility in the field is indeed important for the determination of critical shear stresses. Critical shear stress is the stress that initiates particle movement that promotes shifting of the bankline. An attempt to establish soil erodibility parameters was successfully carried out using a newly fabricated Jet Erosion Device (JEd) based on soil properties. Soil erodibility coefficients are introduced to represent the erodibility of the soils under study. Statistical test is used to confirm the validity and accuracy of the proposed technique. Field data measurements were carried out on 3 rivers. Empirical models were developed using data from Selangor River and validated using data from Bernam and Lui rivers and other secondary river data. Analyses have shown high correlations and the parameters were further examined and analysed for the development of a predictive relationship for J i . The most accurate model was selected based on the adjusted R 2 , standard error of the estimate and discrepancy ratio to illustrate its significance. Selection of the predictive variables was based on their ability to explain the variation of J i . The models established could significantly reduce the cost, time and usage of water supply for field data collection using JEd.

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Seepage Flow-Stability Analysis of the Riverbank of Saigon River Due to River Water Level Fluctuation

Cited by 5 publications

References 0 publications

Gnomon as Source of Information on Planet Rhythms

Gnomon as Source of Information on Planet Rhythms

Case Study on Analyses of Slope Riverbank Failure

ESTABLISHMENT OF JET INDEX Ji FOR SOIL ERODIBILITY COEFFICIENTS USING JET EROSION DEVICE (JEd)

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