Development and application of a 1D floodplain sedimentation model for the River Rhine in The Netherlands

Asselman, N.E.M.; Wijngaarden, M. van

doi:10.1016/s0022-1694(02)00162-2

Cited by 45 publications

(42 citation statements)

References 13 publications

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“…The year-averaged sedimentation of 0.2 Mton/y for the reference situation with the current discharge regime equals 12% of the total sediment flux of 1.7 Mton/y of the River Waal. This is in close agreement with Asselman and van Wijngaarden (2002), who found a value of 13% using a 1D model for all Rhine distributaries together. These deposition values can be regarded as minimum values, because SEDIFLUX does not compute the deposition of sand.…”

Section: Biogeomorphological Changessupporting

confidence: 92%

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Impact of value-driven scenarios on the geomorphology and ecology of lower Rhine floodplains under a changing climate

Straatsma

Schipper

Perk

et al. 2009

Landscape and Urban Planning

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a b s t r a c tThe biogeomorphological functioning of lowland floodplains will be altered strongly due to future landscaping measures that are necessitated by climate change. For many industrialized and urbanized river basins, the layout of the fluvial area depends on the human choices for landscaping measures, which reflect the dominant value system of the actors. We aimed at (1) designing scenarios for the future layout of the floodplains of the River Waal in the Netherlands for 2050 using a new value-based methodology, and (2) assessing the floodplain biogeomorphology under these scenarios and climate change. The scenarios are driven by transitions in human value systems and they are color-coded: green (personalistic-consensual), orange (scientific-rational), and yellow (integrated-systemic). Per scenario, the landscaping measures were translated into a future topography and ecotope distribution. Using various spatially explicit simulation models, we evaluated the scenarios regarding the biogeomorphology in 2050: (1) flood peak reduction (green 0.11, orange 0.65, and yellow 0.37 m), (2) year-average floodplain suspended sediment deposition (+114, +148, +143%), (3) food web exposure to heavy metals (4-5 out of 10 species for all scenarios) and (4) biodiversity value (+23, −4, +39%). We conclude that (1) analysis of value systems provides a broad interpretive framework for scenario development, which guides the choices for transitions and (2) the biogeomorphology is affected by climate change (+58% deposition), but the effects of the local landscaping measures are even stronger. None of the scenarios shows the ideal combination of high flood peak reduction, low sedimentation, and high biodiversity. Ecotoxicological risks seem less discriminative.

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Section: Biogeomorphological Changessupporting

confidence: 92%

“…The total yearly suspended sediment load through the River Waal is 1.7 Mton. Deposition of suspended sediments on the floodplains amounts to 1.3 mm/y on average (Asselman and van Wijngaarden, 2002). Over the past century the Rhine water and sediments have been strongly contaminated.…”

Section: Scopementioning

confidence: 99%

Impact of value-driven scenarios on the geomorphology and ecology of lower Rhine floodplains under a changing climate

Straatsma

Schipper

Perk

et al. 2009

Landscape and Urban Planning

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“…The theoretical maximum trapping efficiency based on the settling velocity of the sediment, the residence time of water in the area, the water depth and water discharge entering or leaving the area, assuming that the suspended sediment is well-mixed across the water depth, reads (Chen 1975 in Asselman andVan Wijngaarden 2002):…”

Section: Discussionmentioning

confidence: 99%

Factors controlling sediment trapping in two freshwater tidal wetlands in the Biesbosch area, The Netherlands

2017

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Purpose A thorough understanding of mechanisms controlling sedimentation and erosion is vital for a proper assessment of the effectiveness of delta restoration. Only few field-based studies have been undertaken in freshwater tidal wetlands. Furthermore, studies that measured sediment deposition in newly created wetlands are also sparse. This paper aims to identify the factors controlling the sediment trapping of two newly created freshwater tidal wetlands. Materials and methods Two recently re-opened polder areas in the Biesbosch, The Netherlands are used as study area. Field measurements of water levels, flow velocities, and turbidity at both the in-and outlet of the areas were carried out to determine the sediment budgets and trapping efficiencies under varying conditions of river discharge, tide, and wind in the period 2014-2016. Results and discussion Short-term sediment fluxes of the two study areas varied due to river discharge, tide, and wind. A positive sediment budget and trapping efficiency was found for the first study area, which has a continuing supply of river water and sediment. Sediment was lost from the second study area which lies further from the river and had a lower sediment supply. The daily sediment budget is positively related to upstream river discharge, and in general, export takes place during ebb and import during flood. However, strong wind events overrule this pattern, and trapping efficiencies decrease for increasing wind strengths at mid-range river discharges and for the highest river discharges due to increased shear stress. Conclusions Delta restoration, based on sedimentation to compensate for sea-level rise and soil subsidence, could only be effective when there is a sufficient supply of water and sediment. Management to enhance the trapping efficiency of the incoming sediment should focus on directing sufficient river flow into the wetland, ensuring the supply of water and sediment within the system during a tidal cycle, creating sufficiently large residence time of water within the polder areas for sediment settling, and decreasing wave shear stress by the establishment of vegetation or topographic irregularities.

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“…Both features seem to have the same background. Conveyance losses of the IJssel River floodplains are clearly higher than those of the Waal River floodplains (Asselman & Van Wijngaarden, 2002). Retention of the suspended matter entering the river branch during a highmagnitude flood (7000 -9000 m 3 ·s -1 ) may reach 93% on the floodplains of the IJssel River branch, whereas this is only 8% for the total Waal River branch (Van der Lee et al, 2004).…”

Section: Variation In Downstream Trend In Sediment Depositionmentioning

confidence: 99%

The influence of floodplain morphology and river works on spatial patterns of overbank deposition

Thonon

Middelkoop

Perk

2007

Netherlands Journal of Geosciences

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Floodplain topography and related hydraulic patterns of overbank flow constitute a major control on the amounts and patterns of sediment deposition on floodplains. We studied the differences in sediment deposition at two scales along two river branches of the lower River Rhine in the Netherlands: the Waal and IJssel River. Human alterations like levelling and embankment construction have severely impacted the floodplains along the Waal River branch (average discharge: 1500 m 3 ·s -1 ), whereas the relatively wide floodplains along the IJssel River (average discharge: 250 m 3 ·s -1 ) still exhibit their characteristic ridge-and-swale topography and natural levees. We found that, in general, the amounts of sediment deposited sediment decreases with increasing distance to the sediment source. Clay and organic matter content generally increase with decreasing floodplain elevation. These trends are, however, far less pronounced in the Waal River floodplains than in the IJssel River floodplains.Sediment deposited on the IJssel River floodplains also contains significantly more sand than the sediment deposited on the Waal River floodplains, probably because of the absence of minor embankments along the IJssel River and its higher sinuosity. Furthermore, during inundation the individual Waal River floodplains receive more sediment per unit area than the IJssel River floodplains. At the scale of the river branch, however, the conveyance losses in the Waal River are less than in the IJssel River, because of the larger surface area of the floodplains along the IJssel River relative to its water and sediment discharge during flood events. This discrepancy stresses that both the individual floodplain sections and the total river branch should be taken into account when studying the role of overbank deposition as part of a river's sediment budget.

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Development and application of a 1D floodplain sedimentation model for the River Rhine in The Netherlands

Cited by 45 publications

References 13 publications

Impact of value-driven scenarios on the geomorphology and ecology of lower Rhine floodplains under a changing climate

Impact of value-driven scenarios on the geomorphology and ecology of lower Rhine floodplains under a changing climate

Factors controlling sediment trapping in two freshwater tidal wetlands in the Biesbosch area, The Netherlands

The influence of floodplain morphology and river works on spatial patterns of overbank deposition

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