One-dimensional numerical simulation of non-uniform sediment transport under unsteady flows

Fang, Hongwei; Chen, Minghong; Chen, Qianhai

doi:10.1016/s1001-6279(09)60003-2

Cited by 59 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on results obtained from validation tests in many reservoirs and rivers, it has been suggested that α equals to 1 in case of erosion and equals to 0.25 for deposition (Fang et al . ).…”

Section: Introductionmentioning

confidence: 97%

“…Fang et al . () presented a nonuniform sediment transport model under unsteady state conditions. In this model, the cross‐section‐averaged sediment transport capacity and recovery coefficient are addressed in the suspended load model and a new discretization scheme for the equation of unsteady nonuniform suspended sediment transport was proposed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Assessment quality of a nonuniform suspended sediment transport model under unsteady flow condition (case study: Aras River)

Merkhali

Ehteshami

Sadrnejad

2015

Water & Environment J

View full text Add to dashboard Cite

This study presents a one-dimensional, fully coupled numerical model for nonequilibrium suspended sediment transport that can be applied to channels and alluvial rivers. The accuracy of calculations was enhanced using a nonuniform size distribution, and evaluating probability of hiding and exposure effect of particles. This model is also capable of calculating the flocculation and temperature effect on sediment transport. In addition, the BOD and its influence on suspended sediment transport have been discussed. The study was conducted on the Aras River, Iran's third major river with a relatively high sediment concentration. To verify the model, water depth and sediment concentration of measured field data are compared with simulated data. Comparisons show a regression coefficient of more than 95% and mean computational error is less than 5%. The agreement of the data shows that the model is capable of predicting flow and suspended sediment transport with a correlation coefficient higher than 98%.

show abstract

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Assessment quality of a nonuniform suspended sediment transport model under unsteady flow condition (case study: Aras River)

Merkhali

Ehteshami

Sadrnejad

2015

Water & Environment J

View full text Add to dashboard Cite

show abstract

“…Numerical methods provide another rapidly developing research approach, one which is tightly connected with laboratory data. These numerical methods very often involve a one-dimensional description of the phenomenon due to its smaller numerical cost (see, e.g., Fang et al [19]), but intensive research has also been conducted on sophisticated 2D numerical methods [20,21]. However, despite the existence of such advanced numerical methods, their progress is limited due to gaps in theory and difficulties in obtaining reliable measurements for calibration.…”

Section: Introductionmentioning

confidence: 99%

Impact of Unsteady Flow Events on Bedload Transport: A Review of Laboratory Experiments

Mrokowska

Rowiński

2019

Water

View full text Add to dashboard Cite

Recent advances in understanding bedload transport under unsteady flow conditions are presented, with a particular emphasis on laboratory experiments. The contribution of laboratory studies to the explanation of key processes of sediment transport observed in alluvial rivers, ephemeral streams, and river reaches below a dam is demonstrated, primarily focusing on bedload transport in gravel-bed streams. The state of current knowledge on the impact of flow properties (unsteady flow hydrograph shape and duration, flood cycles) and sediment attributes (bed structure, sediment availability, bed composition) on bedload are discussed, along with unsteady flow dynamics of the water-sediment system. Experiments published in recent years are summarized, the main findings are presented, and future directions of research are suggested.

show abstract

“…Coupled model between surface and groundwater are linked via an exchange of flux between the two systems. Saint-Venant equation has thus far been promisingly used to model unsteady open channel flow in a river (Fang et al, 2008;Keskin and Agiralioglu, 1997;Mohammad et al, 2007;Zhang and Shen, 2007). However, except for a few simple cases Saint-Venant equation is not amenable to analytical solutions requiring numerical methods such as implicit and explicit finite difference schemes for its solution (Fennema and Chaudhry, 1986;Mousseau et al, 2002;Ramesh et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

A modified hydrodynamic model for routing unsteady flow in a river having piedmont zone

Patowary

Sarma

2016

Journal of Hydrology and Hydromechanics

View full text Add to dashboard Cite

Existence of piedmont zone in a river bed is a critical parameter from among numerous variations of topographical, geological and geographical conditions that can significantly influence the river flow scenario. Downstream flow situation assessed by routing of upstream hydrograph may yield higher flow depth if existence of such high infiltration zone is ignored and therefore it is a matter of concern for water resources planning and flood management. This work proposes a novel modified hydrodynamic model that has the potential to accurately determine the flow scenario in presence of piedmont zone. The model has been developed using unsteady free surface flow equations, coupled with Green-Ampt infiltration equation as governing equation. For solution of the governing equations Beam and Warming implicit finite difference scheme has been used. The proposed model was first validated from the field data of Trout Creek River showing excellent agreement. The validated model was then applied to a hypothetical river reach commensurate with the size of major tributaries of Brahmaputra Basin of India. Results indicated a 10% and 14% difference in the maximum value of discharge and depth hydrograph in presence and absence of piedmont zone respectively. Overall this model was successfully used to accurately predict the effect of piedmont zone on the unsteady flow in a river.

show abstract

One-dimensional numerical simulation of non-uniform sediment transport under unsteady flows

Cited by 59 publications

References 8 publications

Assessment quality of a nonuniform suspended sediment transport model under unsteady flow condition (case study: Aras River)

Assessment quality of a nonuniform suspended sediment transport model under unsteady flow condition (case study: Aras River)

Impact of Unsteady Flow Events on Bedload Transport: A Review of Laboratory Experiments

A modified hydrodynamic model for routing unsteady flow in a river having piedmont zone

Contact Info

Product

Resources

About