Floodplain Sedimentation – Methods, Patterns, and Processes: A Review with Examples from the Lower<scp>R</scp>hine, the<scp>N</scp>etherlands

Middelkoop, H.

doi:10.1002/0470848944.hsa085

Cited by 7 publications

(11 citation statements)

References 124 publications

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“…A number of studies monitoring sedimentation on floodplains have been published, often using mat traps to quantify the accumulative sediment deposition during flood events (Asselmann and Middelkoop, 1995;Steiger et al, 2001Steiger et al, , 2003Middelkoop, 2005;Büttner et al, 2006;Baborowksi et al, 2007;Hung et al, 2013b). But to the knowledge of the authors, these used multiple traps to quantify the deposition at a single point (Asselmann and Middelkoop, 1995;Steiger et al, 2001;Middelkoop, 2005;Baborowksi et al, 2007).…”

Section: N V Manh Et Al: a Case Study In The Mekong Deltamentioning

confidence: 99%

“…But to the knowledge of the authors, these used multiple traps to quantify the deposition at a single point (Asselmann and Middelkoop, 1995;Steiger et al, 2001;Middelkoop, 2005;Baborowksi et al, 2007). However, none of the studies quantified the uncertainties, neither epistemic sampling uncertainty, nor aleatory uncertainty related to spatial variability.…”

Section: N V Manh Et Al: a Case Study In The Mekong Deltamentioning

confidence: 99%

“…Sedimentation is mostly monitored by sediment traps, as shown by a number of recent studies (Steiger et al, 2001Middelkoop, 2005;Büttner et al, 2006;Baborowksi et al, 2007;Hung et al, 2013b). Sediment traps can provide cumulative samples for different physical and chemical analyses.…”

Section: Sediment Trap Designmentioning

confidence: 99%

“…Measurement of sedimentation using clusters of traps has been performed to indicate differences in sediment accumulation over short distances (Asselmann and Middelkoop, 1995), and to calculate average deposition rates (Steiger et al, 2001;Middelkoop, 2005;Baborowksi et al, 2007). In order to increase the representativeness of a single trap for the sedimentation processes due to very high variability of local hydraulic regimes in compartments (Hung et al, 2012),…”

Section: Sampling Schemementioning

confidence: 99%

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Sedimentation monitoring including uncertainty analysis in complex floodplains: a case study in the Mekong Delta

Manh

Merz

Apel

2013

Hydrol. Earth Syst. Sci.

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Abstract. Quantity and quality of sediment deposition in complex floodplains are affected by many processes that are typically highly spatially and temporally variable and hard to quantify exactly. The main processes in this context are suspended sediment transport dynamics in rivers, floodplain channel interactions, and internal floodplain processes. In consequence, any point measurement of sedimentation in floodplains contains a high degree of uncertainty, both stemming from measurement errors and from the lack of representativeness for a larger area. However, up to now, uncertainty analyses have not been performed as part of publications on floodplain sedimentation data. Therefore the present work illustrates a field sampling strategy aiming at the monitoring of floodplain deposition and spatial variability on a large scale and at the quantification of uncertainties associated to sediment deposition data. The study was performed in the Mekong Delta, being an example for a large and complex floodplain with a high degree of anthropogenic disturbances. We present a procedure for the quantification of the uncertainty associated to the data, based on the design of the monitoring campaign, sampling procedures, and floodplain characteristics. Sediment traps were distributed strategically over the floodplain in clusters of three mat traps representing one monitoring point. The uncertainty originating from collection of the traps from still ponding water is quantified by lab experiments. The overall uncertainty of the deposition samples and the associated nutrient content is quantified in a Monte Carlo simulation and illustrated by uncertainty bounds. For the study area the results show a very high variability of the annual floodplain deposition (2.2-60 kg m −2 ) with uncertainty bounds ranging from −61 to +129 % relative to overall mean deposition of 11.4 kg m −2 . No correlations in the spatial distribution of sedimentation in the floodplains could be found. This is caused by the highly complex channel and dike system and the high number of hydraulic structures. Also, no differences in deposition between floodplain compartments protected with high and low dikes could be detected. However, it can be shown that within single floodplain compartments the spatial deposition variability depends on the dike levels and operation and location of hydraulic structures.

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Section: N V Manh Et Al: a Case Study In The Mekong Deltamentioning

confidence: 99%

Section: N V Manh Et Al: a Case Study In The Mekong Deltamentioning

confidence: 99%

Section: Sediment Trap Designmentioning

confidence: 99%

Section: Sampling Schemementioning

confidence: 99%

See 2 more Smart Citations

Sedimentation monitoring including uncertainty analysis in complex floodplains: a case study in the Mekong Delta

Manh

Merz

Apel

2013

Hydrol. Earth Syst. Sci.

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“…A large number of sedimentation studies were conducted and published, Steiger et al [20], [21], Middelkoop [22], Baborowksi et al [23], Hung et al [7] [8] [13], Manh et al [14] [15], Ngoc et al [1], Habersack et al [24], however, these studies focused on other aspects such as reservoir sedimentation, urban retention pond, reservoir influence or suspended sediment mobilization and transport in small mountainous catchments. Then, the sediment transport (ST) model is used to compute spatial variation of sediment erosion and deposition in the river/channel network of the LMD.…”

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confidence: 99%

Assessing the Effects of Upstream Dam Developments on Sediment Distribution in the Lower Mekong Delta, Vietnam

Ngoc¹

2017

JWARP

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The Lower Mekong Delta in Vietnam experiences widespread flooding annually. About 17 million people live in the Delta with agriculture as the major economic activity. The suspended sediment load in the Mekong River plays an important role in carrying contaminants and nutrients to the delta and changing the geomorphology of the delta river system. In recent decades, it is generally perceived that the flow and sediment transport in the Mekong River have changed due to climate change and development activities, but observed sediment data are lacking. Moreover, after natural floodplains, the sediment deposition has replaced by dense river systems as resulting in floodplain compartments protected by embankments. This study is aimed to investigate impacts of changing water flow on erosion/deposition in the Lower Mekong Delta. We used Mike 11 hydrodynamic model and sediment transport model for simulating the flow and sediment transport. Various scenarios were simulated based on anticipated upstream discharges. Our findings provide the positive and negative impacts to the changes in sediment transport on agriculture cultivation in the Lower Mekong Delta.

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Joint isotopic mass balance: a novel approach to quantifying channel bed to channel margins sediment transfer during storm events

Underwood

Renshaw

Dade

et al. 2015

Earth Surf Processes Landf

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The important role of floodplains and the broader riparian zone in providing temporary storage for a large fraction of the annual sediment load of rivers is well established, but this understanding is largely based on observations of the long-term average behavior of the catchment. Here we combine measurements of the fallout radionuclides 7 Be and 210 Pb and the stable isotopes of hydrogen in water to quantify fine sediment mobilization and storage in a stream and its channel margins during individual intermediate-sized storm events with recurrence intervals of a few months or less. We demonstrate this method using five storm events in a small (~15 km 2 ), undeveloped, gravel-bedded tributary of the Connecticut River (USA). We estimate that in each storm, the mass of sediment deposited onto the margins accounts for almost 90% of the sediment mobilized from the bed, with the remainder of the mobilized bed sediment transported downstream as suspended load. The result that the bed is a net source of sediment to the stream and the margins a net sink is robust, but estimates of the mass of material eroded from the bed and deposited on the margins are less certain. The source of sediment to the bed remains unclear as, consistent with earlier studies, we observe only limited deposition of sediment to the bed during the storm events. The suspended sediment is organic-rich and thus its source may be associated with in-channel organic decay between storm events. Understanding the coupled interactions between discharge magnitude and frequency and sediment resupply at the event time scale has important implications for stream restoration efforts seeking to connect the channel and the broader riparian zone, and for the development of accurate sediment budgets and predictions of sediment flux from a watershed.

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Floodplain Sedimentation – Methods, Patterns, and Processes: A Review with Examples from the LowerRhine, theNetherlands

Cited by 7 publications

References 124 publications

Sedimentation monitoring including uncertainty analysis in complex floodplains: a case study in the Mekong Delta

Sedimentation monitoring including uncertainty analysis in complex floodplains: a case study in the Mekong Delta

Assessing the Effects of Upstream Dam Developments on Sediment Distribution in the Lower Mekong Delta, Vietnam

Joint isotopic mass balance: a novel approach to quantifying channel bed to channel margins sediment transfer during storm events

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