2‐D Bed Evolution in Natural Watercourses—New Simulation Approach

Spasojevic, Miodrag; Holly, Forrest M.

doi:10.1061/(asce)0733-950x(1990)116:4(425)

Cited by 50 publications

(25 citation statements)

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“…Various hydraulic models have also been used to simulate geomorphologic changes such as riverbed degradation and the sorting of bed material in regulated rivers (e.g. Yu and Woo, 1993;Yang and Simoes, 1998;Spasojevic and Holly, 1990;Olsen, 1999;Rodi, 2000). In recent years, considerable advances have been made in studies linking stream ecology and geomorphology.…”

Section: Introductionmentioning

confidence: 99%

Effects of dam‐induced flow regime change on downstream river morphology and vegetation cover in the Hwang River, Korea

Choi

Yoon

Woo

2005

River Research & Apps

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The Hapchon Dam, located in the headwaters of the Hwang River, Korea, was completed in 1988. Due to low storage levels, the spillway has not been operated over the past decade. Thus, a new ecosystem has become established in the river downstream of the dam. This is not a common phenomenon in Korean rivers. This study investigates the effect of flow regime change on the river morphology and vegetation cover in a reach downstream of the dam following its construction. Geomorphological effects shown by pre-and post-construction surveys of the channel include channel incision over a stream length of approximately 25 km immediately downstream of the dam. Analysis of pre-and post-construction aerial photography reveals significant encroachment of riparian vegetation onto previously active bar surfaces.

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Section: Introductionmentioning

confidence: 99%

Effects of dam‐induced flow regime change on downstream river morphology and vegetation cover in the Hwang River, Korea

Choi

Yoon

Woo

2005

River Research & Apps

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“…Hence, 2 A  that is used to model the erosion needs to be in a time-function to describe the afore-mentioned pre-equilibrium sediment transport process. Studies of Lin (1984) and Spasojevic and Holly (1990) (14) into the relationship of deposition and erosion in equation (11) will make the erosion to increase boomingly at the start of the sediment transport. Then the erosion will decrease in the natural logarithmic form until the sediment transport equilibrium stage is reached.…”

Section: Time-varying Sediment Adaptation Length Modelmentioning

confidence: 99%

Shallow sediment transport flow computation using time-varying sediment adaptation length

Hussain

Shao

et al. 2014

International Journal of Sediment Research

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YesBased on the common approach, the adaptation length in sediment transport is normally estimated in the temporal\ud independence. However, this approach might not be theoretically justified as the process of reaching of the sediment\ud transport equilibrium stage is affected by the flow conditions in time, especially for those fast sediment moving flows,\ud such as scour-hole developing flow. In this study, the 2D shallow water formulation together with a sediment\ud continuity-concentration (SCC) model were applied to flow with mobile sediment boundary. A time-varying approach\ud was proposed to determine the sediment transport adaptation length to treat the flow sediment erosion-deposition rate.\ud The proposed computational model was based on the Finite Volume (FV) method. The Monotone Upwind Scheme of\ud Conservative Laws (MUSCL)-Hancock scheme was used with the Harten Lax van Leer-contact (HLLC) approximate\ud Riemann solver to discretize the FV model. In the flow applications of this paper, a highly discontinuous dam-break\ud fast sediment transport flow was used to calibrate the proposed time-varying sediment adaptation length model. Then\ud the calibrated model was further applied to two separate experimental sediment transport flow applications\ud documented in literature, i.e. a highly concentrated sediment transport flow in a wide alluvial channel and a sediment\ud aggradation flow. Good agreements with the experimental data were presented by the proposed model simulations. The\ud tests prove that the proposed model, which was calibrated by the discontinuous dam-break bed scouring flow, also\ud performed well to represent the rapid bed change and the steady sediment mobility conditions.The National Natural Science Foundation of China NSFC (Grant Number 20101311246), Major State Basic Research Development Program (973 program) of China (Grant Number 2013CB036402) and Open Fund of the State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University of China (Grant Number SKLH-OF-1103)

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“…The momentum and mass conservation (continuity) equations are coupled using a variation of Patankar's (1980) SIMPLE algorithm extended to shallow-water flows by Zhou (1995). Spasojevic and Holly (1990) give an example of a two-dimensional model of this type. The governing equations are formulated in a conservation form using a full transformation in the curvilinear system (Richmond et al 1986).…”

Section: River Flow and Transport Modulementioning

confidence: 99%

A Demonstration of the System Assessment Capability (SAC) Rev. 1 Software for the Hanford Remediation Assessment Project

Eslinger¹,

Kincaid²,

Nichols³

et al. 2006

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2‐D Bed Evolution in Natural Watercourses—New Simulation Approach

Cited by 50 publications

References 10 publications

Effects of dam‐induced flow regime change on downstream river morphology and vegetation cover in the Hwang River, Korea

Effects of dam‐induced flow regime change on downstream river morphology and vegetation cover in the Hwang River, Korea

Shallow sediment transport flow computation using time-varying sediment adaptation length

A Demonstration of the System Assessment Capability (SAC) Rev. 1 Software for the Hanford Remediation Assessment Project

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