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Three years of morphological dune development after planting marram grass on a beach
Strypsteen, G.; Bonte, D.; Taelman, C.; Derijckere, J.; Rauwoens, P. (2024). Three years of morphological dune development after planting marram grass on a beach. Earth Surf. Process. Landforms 49(10): 2980-2997
In: Earth Surface Processes and Landforms: the Journal of the British Geomorphological Research Group. John Wiley/Wiley: Chichester, Sussex; New York. ISSN 0197-9337; e-ISSN 1096-9837, meer
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| Trefwoorden |
Aeolian processes
Marien/Kust |
| Author keywords |
coastal adaptation, ecosystem services, field measurements, nature-based solution, sediment dynamics |
| Abstract |
Coastal regions globally face escalating challenges from climate change, including rising sea levels and intensified storm events. To address these threats, coastal resilience emerges as a critical paradigm advocating the integration of nature-based solutions with traditional engineering approaches. Coastal dunes, acting as protective barriers, offer a promising avenue. This three-year study assesses the efficacy of an artificial dune system to address local sand-related nuisances on the adjacent seawall featuring planted marram grass in Oosteroever, Belgium. The focus is on understanding sediment accumulation, dune morphology and vegetation development. The results demonstrate a significant increase in dune height, reaching up to 2 m in the zones planted with marram grass, surpassing the height of the adjacent seawall. Comprehensive profiles and drone surveys revealed consistent dune growth of 27 m3/m, which contrasted with the substantial erosion in the adjacent unvegetated beach areas of up to 30 m3/m. One storm event caused dune toe erosion of 1.5 m3/m, but the dune demonstrated rapid recovery through natural aeolian processes. Marram grass development was not impacted by the initial planting configuration and density and was more pronounced at the perimeter edges of the dune. This study highlights the success of the ‘dune-in-front-of-a-dike’ approach, offering insights for sustainable coastal resilience strategies. |
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