Modeling erosion and overbank deposition during extreme flood conditions on the Carson River, Nevada

Carroll, Rosemary; Warwick, John J.; James, Andrew I.; Miller, Jerry R.

doi:10.1016/j.jhydrol.2004.04.012

Cited by 47 publications

(30 citation statements)

References 24 publications

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“…Our nding stands in contradiction with results from other rivers, where ow magnitude was a factor of key importance [e.g. [40,[57][58][59][60]. Further, we found that ood magnitude could belong to the controlling variables in uencing rate of channel width change, as there was a positive correlation on the meander scale between Qmax and ∆W.…”

Section: Variables Controlling Planform Changescontrasting

confidence: 99%

Response of lateral channel dynamics of a lowland meanderingriver to engineering-derived adjustments - an example of theMorava River (Czech Republic)

Ondruch

Máčka

2015

Open Geosciences

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Freely meandering (quasi)natural reaches of lowland rivers represent a rare phenomenon in Central Europe. Increasing attention is currently being paid to the dynamics of quasi-natural (arti cially in uenced) meandering rivers as this attention represents the basic prerequisite for the development of appropriate restoration strategies on regulated rivers. This study focused on a 5.5 km long reach of the Morava River in the Strážnické Pomoraví region, Czech Republic that is characterised by quasi-natural evolution after substantial engineering adjustments were made in the rst decades of the twentieth century. Based on Geographic Information Systems (GIS) analysis of aerial photographs, the spatio-temporal dynamics of bank erosion and accretion rates were quantitatively described and variables that control channel migration rates were identi ed. High rates of lateral shifts were localised in high sinuosity segments (sinuosity 1.17-2.37), whereas segments with very low rates were straight or formed into slightly curved bends (sinuosity 1.05-1.18). As a key factor, engineering works that in uenced local river bed slope and induced a dramatic increase in bank erosion rates were identi ed. River engineering works induced a dramatic increase in bank erosion rate (2.19 m/year for 1938-53 and 1.47 m/year for 1953-63). An interval of approximately 25 years was needed before the erosion rates dropped back to values documented before river regulation (0.35-1.09 m/year for 1841-1938). Other important controlling variables included radius of curvature, frequency and magnitude of oods and, locally, river bank material properties and oodplain land cover.

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Section: Variables Controlling Planform Changescontrasting

confidence: 99%

Response of lateral channel dynamics of a lowland meanderingriver to engineering-derived adjustments - an example of theMorava River (Czech Republic)

Ondruch

Máčka

2015

Open Geosciences

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“…Given the large variability in bank erosion estimates shown to occur on an annual timescale along the Daintree River, as well as the errors associated with large scale catchment models, it is unlikely that there will ever be perfect agreement between measured and modelled bank erosion estimates. Therefore, if knowledge about the amount and location of bank erosion is required for a given river at the reach scale, other smaller scale hydraulic models that can deal with dynamic changes in channel width, and the interaction between the channel and the floodplain, may be more appropriate (see, e.g., Carroll et al, 2004). …”

Section: Comparison Of Measured and Modelled Bank Erosion Datamentioning

confidence: 99%

Bank erosion and channel width change in a tropical catchment

Bartley¹,

Keen²,

Hawdon³

et al. 2008

Earth Surf Processes Landf

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Catchment sediment budget models are used to predict the location and rates of bank erosion in tropical catchments draining to the Great Barrier Reef lagoon, yet the reliability of these predictions has not been tested due to a lack of measured bank erosion data. This paper presents the results of a 3 year field study examining bank erosion and channel change on the Daintree River, Australia. Three different methods were employed: (1) erosion pins were used to assess the influence of riparian vegetation on bank erosion, (2) bench-marked cross-sections were used to evaluate annual changes in channel width and (3) historical aerial photos were used to place the short term data into a longer temporal perspective of channel change . The erosion pin data suggest that the mean erosion rate of banks with riparian vegetation is 6·5 times (or 85%) lower than that of banks without riparian vegetation. The changes measured from cross-section surveys suggest that channel width has increased by an average of 0·74 (± ± ± ± ±0·47) m a − − − − −1 over the study period (or ~0·8% yr − − − − −1 ). The aerial photo results suggest that over the last 30 years the Daintree River has undergone channel contraction of the order of 0·25 m a − − − − −1 . The cross-section data were compared against modelled SedNet bank erosion rates, and it was found that the model underestimated bank erosion and was unable to represent the variable erosion and accretion processes that were observed in the field data. The reach averaged bank erosion rates were improved by the inclusion of locally derived bed slope and discharge estimates; however, the results suggest that it will be difficult for catchment scale sediment budget models to ever accurately predict the location and rate of bank erosion due to the variation in bank erosion rates in both space and time. Figure 1. (A) Daintree River catchment, showing the location of the main stream gauge, broad vegetation types and major tributaries. (B) Study reach between the stream gauge and Daintree Village, showing the location of field monitoring sites and additional aerial photo cross-sections and pin sites. This figure is available in colour online at

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“…Many authors [61][62][63][64][65] have shown that changes in the frequency and magnitude of peak flows and flood events are an essential part of the historic dynamics of river channels where flood events lead to a considerable increase in bank erosion.…”

Section: Methodsmentioning

confidence: 99%

Spatial and Temporal Variability of Bank Erosion during the Period 1930–2016: Case Study—Kolubara River Basin (Serbia)

Dragićević

Pripužić

Živković

et al. 2017

Water

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Abstract:The fluvial process is characterized by an intense meandering riverbed. The aim of this study was to perform a reconstruction of the lateral migration of a 15 km length of an active meandering river during the period 1930-2016. River morphological changes were analyzed and quantified from cadastral maps and aerial photographs as well as by geodetic survey and GIS. Hydrological characteristics and extreme hydrological events were evaluated in relation to bank erosion rate. The rate of bank erosion was markedly different from the long-term studied meanders, just like in the short-term period. During the 87 years of observation (from 1930 to 2016), the length of the Kolubara River was enlarged by 3.44 km. The average migration rate of the Kolubara River for monitored meanders in the period 1930-2010 was 1.9 m·year −1 , while in the period 2010-2016, the average migration rate was 3.3 m·year −1 . The rate of bank erosion was more intensive across the entire short-term period than during the longer period, and the maximum annual rate of bank erosion during the period 2010-2016 varied between 0.3 and 11.5 m. It is very likely that in the period from 2010, frequent discharge variations and rapid change of its extreme values caused more intensive bank erosion. These research results will be valuable for river channel management, engineering (soft and hard engineering), and planning purposes (predicting changes in river channel form) in the Kolubara River Basin.

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Modeling erosion and overbank deposition during extreme flood conditions on the Carson River, Nevada

Cited by 47 publications

References 24 publications

Response of lateral channel dynamics of a lowland meanderingriver to engineering-derived adjustments - an example of theMorava River (Czech Republic)

Response of lateral channel dynamics of a lowland meanderingriver to engineering-derived adjustments - an example of theMorava River (Czech Republic)

Bank erosion and channel width change in a tropical catchment

Spatial and Temporal Variability of Bank Erosion during the Period 1930–2016: Case Study—Kolubara River Basin (Serbia)

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