Hydraulic erosion of cohesive riverbanks

Julian, Jason P.; Torres, Raymond

doi:10.1016/j.geomorph.2005.11.003

Cited by 238 publications

(233 citation statements)

References 33 publications

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“…Channel-widening in response to increased urban runoff may be common in the Piedmont due to the presence of bedrock at shallow depths and bed armoring, which can limit channel incision [81]. However, the silt-clay content of channel banks may also influence the channel erosion response [82].…”

Section: Urbanization Effects On Channel Geomorphology and Sediment Tmentioning

confidence: 99%

Urbanization Effects on Watershed Hydrology and In-Stream Processes in the Southern United States

O’Driscoll

Clinton

Jefferson

et al. 2010

Water

342

219

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Abstract:The southern United States is characterized by a humid, subtropical climate and consists of 16 states (Texas, Oklahoma, Arkansas, Louisiana, Mississippi, Tennessee, Kentucky, Alabama, Florida, Georgia, South Carolina, North Carolina, Virginia, West Virginia, Delaware, and Maryland) and Washington DC. Currently this region is experiencing the largest net population growth in the U.S. Over the last century, the expansion of large urban centers and impervious area in the region has altered the hydrologic cycle. This review synthesizes regional research that shows how watershed hydrology, groundwater recharge, stream geomorphology, climate, biogeochemistry, and stream ecology have been affected by urbanization and the expansion of watershed impervious area.

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Section: Urbanization Effects On Channel Geomorphology and Sediment Tmentioning

confidence: 99%

Urbanization Effects on Watershed Hydrology and In-Stream Processes in the Southern United States

O’Driscoll

Clinton

Jefferson

et al. 2010

Water

342

219

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“…This model estimates bank erosion as a function of the duration of excess bank shear stress following the general methodology of Julian and Torres (2006). It was previously calibrated against measurements of the bank erosion contribution to catchment sediment yield derived from sediment fingerprinting studies (Collins and Anthony, 2008).…”

Section: Bank Erosionmentioning

confidence: 99%

A model‐based assessment of non‐compliance of phosphorus standards for lakes in England and Wales

Duethmann

Anthony

Carvalho

et al. 2009

International Journal of River Basin Management

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High phosphorus concentrations causing eutrophication will prevent many lakes in England and Wales from reaching good ecological status by 2015 according to the EC Water Framework Directive (WFD). The aim of this study was to estimate the percentage of lakes in England and Wales that are likely to fail recently agreed WFD phosphorus standards. As measured lake phosphorus concentrations are only available for a small number of lakes a model-based approach was adopted. This involved estimating phosphorus loads from a wide range of sources including agricultural loads, sewage effluents, septic tanks, diffuse urban sources, atmospheric deposition, groundwater and bank erosion. Lake phosphorus concentrations were predicted using the Vollenweider model, and the model framework was satisfactorily tested against available observed lake concentration data. Applying the model to all lakes in England and Wales greater than 1 ha, it was estimated that under current conditions, roughly two thirds of the lakes would fail good ecological status with respect to phosphorus. According to our estimates, agricultural phosphorus loads represent the dominant source for the majority of catchments, but diffuse urban runoff also is important in many lakes and sewage effluents are the most frequent dominant source for lake catchments greater than 100 km 2 . Required reductions of phosphorus loads to increase the number of lakes achieving good ecological status and potential delays because of internal loading and biological resistances are briefly discussed.

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“…For example, progress in quantifying fluvial erosion (i.e., the removal of bank material by the action of hydraulic forces) has included the development and application of specific techniques for measuring in situ the erodibility parameters of the bank sediments [Tolhurst et al, 1999;Hanson and Simon, 2001;Wynn and Mostaghimi, 2006;Clark and Wynn, 2007], as well as methods to model the near-bank flow field using computational fluid dynamics (CFD) and other techniques [Darby et al, 2004;Smith, 2006a, 2006b;McBride et al, 2007;Julian and Torres, 2006;Papanicolaou et al, 2007]. With respect to mass failure, recent studies have focused on two main topics:…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of hydrodynamics and bank erosion in a river bend

Rinaldi

Mengoni²,

Luppi

et al. 2008

Water Resources Research

199

141

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[1] We present an integrated analysis of bank erosion in a high-curvature bend of the gravel bed Cecina River (central Italy). Our analysis combines a model of fluvial bank erosion with groundwater flow and bank stability analyses to account for the influence of hydraulic erosion on mass failure processes, the key novel aspect being that the fluvial erosion model is parameterized using outputs from detailed hydrodynamic simulations. The results identify two mechanisms that explain how most bank retreat usually occurs after, rather than during, flood peaks. First, in the high curvature bend investigated here the maximum flow velocity core migrates away from the outer bank as flow discharge increases, reducing sidewall boundary shear stress and fluvial erosion at peak flow stages. Second, bank failure episodes are triggered by combinations of pore water and hydrostatic confining pressures induced in the period between the drawdown and rising phases of multipeaked flow events.

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Hydraulic erosion of cohesive riverbanks

Cited by 238 publications

References 33 publications

Urbanization Effects on Watershed Hydrology and In-Stream Processes in the Southern United States

Urbanization Effects on Watershed Hydrology and In-Stream Processes in the Southern United States

A model‐based assessment of non‐compliance of phosphorus standards for lakes in England and Wales

Numerical simulation of hydrodynamics and bank erosion in a river bend

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