Sediment Trend Analysis through the variation of granulometric parameters: A review of theories and applications |
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| Authors: | Emmanuel Poizot Yann Méar Laurie Biscara |
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| Institution: | 1. Université Bretagne-Sud, FRE CNRS 3744, IRDL, 56100 Lorient, France;2. Université de Nantes, CNRS, GEPEA UMR 6144, 44602 Saint-Nazaire, France;3. SERPBIO, Université Bretagne-Sud, 56321 Lorient, France;1. Graduate School of Urban Innovation, Yokohama National University, 79-1 Tokiwadai, Hodogaya Ward, Yokohama 240-8501, Japan;2. Faculty of Urban Innovation, Department of Civil Engineering, Yokohama National University, 79-1 Tokiwadai, Hodogaya Ward, Yokohama 240-8501, Japan;3. Senior Researcher, Coastal and Estuarine Sediment Dynamics Group, Port and Airport Research Institute, Japan;1. Dept. of Civil Engineering, University of Alicante, Carretera San Vicent del Raspeig s/n, 03690 Alicante, Spain;2. Dept. of Transportation, Polytechnic University of Valencia, Camino de Vera s/n, 46022 Valencia, Spain;1. Geographical Institute, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi út 45, H-1112, Budapest, Hungary;2. Department of Geology & Meteorology, University of Pécs, Ifjúság u. 6, H-7624 Pécs, Hungary;3. Environmental Analytical & Geoanalytical Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság u. 20, H-7624 Pécs, Hungary;4. Department of Environmental and Landscape Geography (Institute of Geography and Earth Sciences, Faculty of Science), Eötvös University, Pázmány Péter sétány 1/c, H-1117 Budapest, Hungary;5. Department of Solid State Physics, University of Debrecen, Bem tér 18/b, H-4026 Debrecen, Hungary;6. Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi u. 45., H-1112 Budapest, Hungary |
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| Abstract: | Spatial variations in grain-size parameters (i.e. grain-size trends) contain information on sediment transport patterns. Analytical procedures have been proposed using the grain-size trend to determine net sediment transport pathways. In the first part of this study, the fundamentals of the theory are presented through methods for analysing 1D and 2D variations. The methods used are critically discussed, while pointing out some severe problems. So far, these methods suffer from limitations leading to serious interpretational errors, making it necessary to take account of two kinds of uncertainties. Inputs uncertainties are linked to the physical sediment properties as well as procedures of sampling and analysis. Model uncertainties are then discussed for each step of the grain-size trend analysis. The validity of Sediment Trend Analysis under natural conditions is tested against published field studies to determine the most appropriate variation trend to use in a specific environment. Proposals are given for each step of the procedure for optimal use of the method using a Quality Assurance (QA) approach. Further developments are proposed, such as integration into a Geographic Information System. |
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