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DOI10.1007/s11852-019-00687-x
Sensitivity assessment of the deltaic coast of Medjerda based on fine-grained sediment dynamics, Gulf of Tunis, Western Mediterranean
Amrouni, Oula1; Sanchez, A.2; Khelifi, N.3,4; Benmoussa, T.5,6; Chiarella, D.; Mahe, G.7; Abdeljaouad, S.5; McLaren, P.8
发表日期2019
ISSN1400-0350
EISSN1874-7841
卷号23期号:3页码:571-587
英文摘要

As coastal areas become increasingly vulnerable to climate change, the study of nearshore sediment textures along the littoral cell of the Medjerda delta in the Gulf of Tunis, southern Mediterranean coastcan provide valuable information (i) on the origin (continental or marine) of the sediment, (ii) its transport direction, and (iii) constitutes an important tool in the assessment of coastal sensitivity. A total of 120 sediments samples underwent grain size analysis and statistic parameters have been calculated. These allowed the identification of five different Sedimentary Types (ST). Accordingly, using grain size indexes (i.e. Mz, SKI and Ku), Sediment Trend Analysis (STA) modeling tools were applied to define the seasonal sediment transport pathways throughout the nearshore of the Medjerda sedimentary cell. Results show that grain size distribution (GSD) and STA model pathways are determined by cross-shore geomorphology, location of the sediment-cell, seasonal incident wave and local terrestrial supply. The appearance in an atypical seabed location of the finer (Mo=0.1mm) and the coarser STs (Mo=0.8mm) can be indicative of human influence since the coarser particles are usually retained by dam structures. Moreover, the bimodality and the increased distribution of mud are also related to the seasonal incident wave winnowing of the historic deltaic plain submerged by the relative rise in sea level. The evolution of the sediment pattern towards a greater proportion of very fine grains indicates a deficit of sediment supply, particularly of the coarser grains, and demonstrates the coastal vulnerability of the Gulf of Tunis due to anthropic effects.


WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
来源期刊JOURNAL OF COASTAL CONSERVATION
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/98381
作者单位1.Univ Carthage, Natl Inst Marine Sci & Technol, Lab Marine Environm, Carthage Salammbo 2025, Tunisia;
2.Inst Politecn Nacl, Ctr Interdisciplinario Ciencias Marinas, La Paz, Bcs, Mexico;
3.GEOMAR Helmholtz Ctr Ocean Res Kiel, D-24148 Kiel, Germany;
4.Springer, Middle East & North Afican Program, D-69121 Heidelberg, Germany;
5.Univ Tunis El Manar, Fac Sci, Dept Geol, Lab Energet Mineral Resources & Environm, Tunis 2092, Tunisia;
6.Royal Holloway Univ London, Dept Earth Sci, Egham TW20 0EX, Surrey, England;
7.Univ Montpellier 2, UMR5569, IRD HydroSci Montpellier, Case Courrier MSE, Pl Eugene Bataillon, F-34095 Montpellier 5, France;
8.SedTrend Anal Ltd, Brentwood Bay, BC V8M1C5, Canada
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Amrouni, Oula,Sanchez, A.,Khelifi, N.,et al. Sensitivity assessment of the deltaic coast of Medjerda based on fine-grained sediment dynamics, Gulf of Tunis, Western Mediterranean[J],2019,23(3):571-587.
APA Amrouni, Oula.,Sanchez, A..,Khelifi, N..,Benmoussa, T..,Chiarella, D..,...&McLaren, P..(2019).Sensitivity assessment of the deltaic coast of Medjerda based on fine-grained sediment dynamics, Gulf of Tunis, Western Mediterranean.JOURNAL OF COASTAL CONSERVATION,23(3),571-587.
MLA Amrouni, Oula,et al."Sensitivity assessment of the deltaic coast of Medjerda based on fine-grained sediment dynamics, Gulf of Tunis, Western Mediterranean".JOURNAL OF COASTAL CONSERVATION 23.3(2019):571-587.
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