2017
DOI: 10.5194/esurf-5-387-2017
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Efficient retention of mud drives land building on the Mississippi Delta plain

Abstract: Abstract. Many of the world's deltas -home to major population centers -are rapidly degrading due to reduced sediment supply, making these systems less resilient to increasing rates of relative sea-level rise. The Mississippi Delta faces some of the highest rates of wetland loss in the world. As a result, multibillion dollar plans for coastal restoration by means of river diversions are currently nearing implementation. River diversions aim to bring sediment back to the presently sediment-starved delta plain. … Show more

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Cited by 38 publications
(31 citation statements)
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“…Nonvegetated splay morphology is smoother, and nonvegetated floodplains tend to favor avulsions. Strongly vegetated floodplains develop more intricate channel patterns and are more efficient in retaining sediment (Figure 4c), in agreement with earlier studies that inferred that vegetation promotes sediment trapping on floodplains and reduces erosion (e.g., Esposito et al, 2017;Schumm & Lichty, 1963). From our morphodynamic simulations we find the highest rate of land growth for intermediate vegetation strengths, similar to the findings from the hydrodynamic simulations of Nardin and Edmonds (2014).…”
Section: Effects Of Soil Consolidation and Vegetationsupporting
confidence: 91%
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“…Nonvegetated splay morphology is smoother, and nonvegetated floodplains tend to favor avulsions. Strongly vegetated floodplains develop more intricate channel patterns and are more efficient in retaining sediment (Figure 4c), in agreement with earlier studies that inferred that vegetation promotes sediment trapping on floodplains and reduces erosion (e.g., Esposito et al, 2017;Schumm & Lichty, 1963). From our morphodynamic simulations we find the highest rate of land growth for intermediate vegetation strengths, similar to the findings from the hydrodynamic simulations of Nardin and Edmonds (2014).…”
Section: Effects Of Soil Consolidation and Vegetationsupporting
confidence: 91%
“…The percentage of imported sediment retained in the splay ranges from 62 to 100%. Esposito et al (2017) estimated an imported sand fraction of 6.6% and a likely range of sediment retention efficiency between 75 and 100%.…”
Section: Comparison Against Mississippi River Delta Crevasse Splaysmentioning
confidence: 99%
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