Numerical simulation of hydrodynamic characteristics and bedload transport in cross sections of two gravel-bed rivers based on one-dimensional lateral distribution method

Van, Chien Pham; Chua, Vivien P.

doi:10.1016/j.ijsrc.2019.12.001

Cited by 6 publications

(2 citation statements)

References 35 publications

(112 reference statements)

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“…The literature [13] designed two working conditions with and without weak interlayers, constructed numerical calculation models for slopes with different step slope angles, calculated slope stability coefficients for each model, and compared and analyzed the calculation results. The literature [14] selected a typical representative slope section for numerical simulations and explored the potential damage mechanism of the sand and mud interbedded gently inclined to cascade high slope through numerical model analysis. The literature [15] took the Tang Ya limestone mine as an example and used geological engineering analysis and the discrete particle element software MatDEM to compare and analyze the influence of two different slope models of step excavation with and without soft and weak interlayers.…”

Section: Introductionmentioning

confidence: 99%

Prediction analysis of slope stability due to soft and weak interlayers based on partial least squares method

Cui

2023

Applied Mathematics and Nonlinear Sciences

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In this paper, based on sampling and analysis of a large number of soft and weak sandwich slope data, several factors that have a great influence on slope stability are established, and a predictive analysis model describing the stability of soft and weak sandwich slopes is established by using the now more advanced partial least squares method. Then, for the traditional partial least squares method that is not suitable for the non-linear stability coefficient of the weak sandwich to slope stability prediction, the recursive partial least squares method with forgetting factor is proposed for the weak sandwich to slope stability prediction analysis to solve the problem of stability prediction lag. Finally, based on elastic mechanics, elastic fracture mechanics and unsaturated soil mechanics, the structure of soft and weak interlayers on slopes and their stability strength are studied, and the performance of MATLAB-based partial least squares method for slope stability prediction analysis is verified by designing orthogonal experiments. The results show that the predicted values do not differ much from the results of finite element calculation, the absolute errors are all less than 0.15, and there are 5 absolute non-differences less than 0.1, accounting for 62.5% of the total number of predicted groups. The relative errors were less than 6%. This study shows that the partial least squares method can deal with the nonlinear mapping relationship between slope stability and influencing factors well and can make more accurate and objective prediction results on the stability of slopes.

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Section: Introductionmentioning

confidence: 99%

Prediction analysis of slope stability due to soft and weak interlayers based on partial least squares method

Cui

2023

Applied Mathematics and Nonlinear Sciences

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“…Unsteady flow numerical simulation over mobile beds is theoretically challenging and practically important in the field of river engineering. So far, a large number of numerical river modeling methodologies of water-sediment-morphology fluvial systems have been developed (Van & Chua 2020). These methodologies have been applied as the primary methods in river engineering studies (Liao et al 2014).…”

Section: Introductionmentioning

confidence: 99%

An inverse problem for modeling open channel flow with movable bed

Roushangar

Ghasempour

Azamathulla³

2022

Water Supply

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In this research, an explicit finite difference two steps scheme developed by Richtmeyer is presented for simulation of 1D steady /unsteady flow and bed morphology in alluvial channels. Some laboratory experiments were performed in a mobile-bed flume for both of steady an unsteady flow to validate the proposed model. For improving the simulation, firstly, the role of sediment transport formulas, coupled-uncoupled approaches and simplification in the mass continuity equation are investigated. Compares between experimental data and model performance highlight the advantage of coupled method over the uncoupled method, domain role of sediment transport model in the bed morphological simulation and inaccuracy of aggradation processes due to simplifying the mixture continuity equation. Secondly the importance of changing alluvial roughness is established by testing the model with calibrated and optimized friction factors. The inverse problem of estimating alluvial flow roughness is solved using a genetic algorithm (GA) optimization model coupled with alluvial flow model. The study demonstrates that the application of GA in the search for optimal values of roughness coefficients can significantly reduce computational errors and improve the computed water stage hydrographs. Role of the choice of the objective function is also mentioned.

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Simulations of Local Scour Depth at Piers of the Ben Thuy Bridge, Nghe an Province

Van

2021

Lecture Notes in Civil Engineering

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Numerical simulation of hydrodynamic characteristics and bedload transport in cross sections of two gravel-bed rivers based on one-dimensional lateral distribution method

Cited by 6 publications

References 35 publications

Prediction analysis of slope stability due to soft and weak interlayers based on partial least squares method

Prediction analysis of slope stability due to soft and weak interlayers based on partial least squares method

An inverse problem for modeling open channel flow with movable bed

Simulations of Local Scour Depth at Piers of the Ben Thuy Bridge, Nghe an Province

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