Control of sediment deposition rates in two mid-Atlantic Coast tidal freshwater wetlands

Darke, Arlene K.; Megonigal, J. Patrick

doi:10.1016/s0272-7714(02)00353-0

Cited by 62 publications

(51 citation statements)

References 46 publications

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“…However, we conclude that sediment fluxes for longer periods may be underestimated, since events with high discharge and suspended sediment concentrations with return periods considerably greater than the monitoring period are missing in the observed time series. Furthermore, the role of vegetation in increased sedimentation of suspended material and accretion due to production of organic material as found by Darke and Megonigal (2003), Day et al (2011), Schile et al (2014 and (DeLaune et al 2016) is negligible in both the Kleine Noordwaard and Zuiderklip areas.…”

Section: Discussionmentioning

confidence: 87%

“…Low rates of accumulation of 0.6 to 1.2 mm year −1 have among others been found by Craft and Casey (2000), while high rates of accumulation in the order of 20-180 mm year −1 have been found by Darke and Megonigal (2003), Mitsch et al (2014), Auerbach et al (2015), and Roberts et al (2015). Negative sediment budgets, such as found for the Zuiderklip area, have been reported by among others (Sheehan and Ellison 2015) and Van der Wal and Pye (2004).…”

Section: Discussionmentioning

confidence: 88%

“…Previous studies have indicated that sediment deposition in wetlands is controlled by various factors including the flooding frequency, depth, and duration (French and Spencer 1993;Middelkoop and van der Perk 1998;Reed et al 1999;Temmerman et al 2003;Thonon et al 2007;Schuerch et al 2013), the surface area of the wetland, the suspended sediment load (French and Spencer 1993;Asselman and Middelkoop 1998;Morse et al 2004;Noe et al 2016), and the ability of sediment to settle, which in turn, depends on sediment flow paths (French and Spencer 1993;Siobhan Fennessy et al 1994;Reed et al 1999;Davidson-Arnott et al 2002;Temmerman et al 2003;Anderson and Mitsch 2007;Mitsch et al 2014), wind (Orson et al 1990;Delgado et al 2013), and vegetation (Darke and Megonigal 2003;Temmerman et al 2005;Schile et al 2014;Mitsch et al 2014). These studies were mainly conducted in salt marshes or river flood plains; only few field-based studies were undertaken in freshwater tidal wetlands that represent the transition between these environments.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

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

2017

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“…There are three likely causes for the weak relations we found in the Kleine Noordwaard study area: 1) the small gradient in surface topography and a large variation in micro-relief by the presence of mudflat runnels, old furrows, and ditches (Whitehouse et al, 2000;Takekawa et al, 2010;Fagherazzi and Mariotti, 2012); 2) the absence of vegetation (Neubauer et al, 2002;Darke and Megonigal, 2003;Vandenbruwaene et al, 2015), and 3) the small tidal range and water depths (Mariotti and Fagherazzi, 2013). These three factors result in an uniform sediment distribution by 15 firstly, micro topographic flow paths during low water levels (Hupp et al, 2008;Temmerman et al, 2005a); secondly, sheet flow during high water levels (Vandenbruwaene et al, 2015;Temmerman et al, 2005a); or thirdly, a relatively large impact of shear stress (Fagherazzi and Mariotti, 2012) of wind waves and currents, which hamper sediment settling and/or promote sediment redistribution across the tidal flats.…”

Section: Intertidal Flatsmentioning

confidence: 93%

Establishing a sediment budget in the newly created Kleine Noordwaard wetland area in the Rhine-Meuse delta

Deijl¹,

Perk²,

Middelkoop³

2017

Preprint

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Abstract. Many deltas are threatened by accelerated soil subsidence, sea-level rise, increasing river discharge, and sediment starvation. Effective delta restoration and effective river management require a thorough understanding of the mechanisms of aggradation, erosion, and their controls. Sediment dynamics has been studied at floodplains and marshes, but little is known about the sediment dynamics and budget of newly created wetlands. Here we take advantage of a recently opened tidal freshwater system to study both the mechanisms and controls of aggradation and erosion in newly created wetlands. We quantified . This is enough to compensate for the actual rates of sea-level rise and soil subsidence in The Netherlands.

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“…Sediment deposition plays a critical role in the sustainable production of rice in the southern coastal tidal soils of Bangladesh, because tidal water increases plant height, tiller production, shoot weight, and nitrogen concentration and uptake of rice (Haque et al, 2008). Velocity and duration of flooding can influence sediment deposition and hence nutrient availability in tidal fresh water marshes (Darke and Megonigal, 2003). Sedimentation in tidal areas is generally highest during rainy-season when high river discharge and current of water increases riverbank erosion, fully covered rice field traps sediment on the tidal flooded marshes, nutrient uptake also increased as well (Morse et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Effect of tidal submergence on potassium nutrition and yield of rice (Oryza sativa L.)

Haque

2012

Bangladesh J. Agric. Res

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Field experiments were conducted at Patuakhali Science and Technology University research farm during 2009 T. Aman season to investigate the effect of tidal submergence on potassium nutrition and yield of rice. The experiment included two levels of irrigation water source-i) tidal water and ii) ground water, and three levels of fertilizers-i) absolute control (no fertilizer), ii) NP (K omission), and iii) NPK (K addition). The rice varieties were BR23 (HYV) and Lalmota (traditional variety). A general increase in growth, yield and yield contributing parameters were found due to irrigation with tidal water. Tidal water contributed about 19% (BR23) and 11% (Lalmota) higher grain yield in Aman season 2009 compared to that grown with ground water. Potassium contents of rice grain and straw were always higher when plants are irrigated with tidal water. In general, tidal submergence increased K uptake of rice. The K uptake by BR23 under tidal water was about 47, 43 and 8 kg/ha more than those recorded with ground water irrigation under absolute control, K omission and K addition treatments, respectively whereas it was 31, 21, and 68 kg/ha, in Lalmota. The results indicated that whether fertilizers were applied or not plants absorb considerable amount of K from tidal water.

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Control of sediment deposition rates in two mid-Atlantic Coast tidal freshwater wetlands

Cited by 62 publications

References 46 publications

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

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

Establishing a sediment budget in the newly created Kleine Noordwaard wetland area in the Rhine-Meuse delta

Effect of tidal submergence on potassium nutrition and yield of rice (Oryza sativa L.)

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