Measuring and modelling longshore sediment transport

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• 作者：Luciana S. Esteves ; Jon J. Williams ; Maria A. Lisniowski
• 关键词：longshore sediment transport ; suspended load ; sediment traps ; field measurements ; prediction ; concentration profile ; Brazil ; Paraná ; Rio Grande do Sul ; Portugal ; Faro ; Denmark ; Skallingen
• 刊名：Estuarine, Coastal and Shelf Science
• 出版年：2009
• 出版时间：10 June 2009
• 年：2009
• 卷：83
• 期：1
• 页码：47-59
• 全文大小：1075 K

文摘

Field measurements of longshore sediment transport (LST) was undertaken on barred and non-barred beaches composed of fine, medium and coarse sands in Brazil, Denmark and Portugal. Measurements and predictions of vertical suspended sediment concentration profiles (C-Profiles) and cross-shore hydrodynamic parameters were then combined in a new semi-empirical model for prediction of LST (LT-MOD). Instantaneous LST predictions from LT-MOD and well-known bulk LST formulae were compared. Tests using LT-MOD to simulate measured changes in shoreline position in southern Brazil for periods of c. two years showed that LT-MOD gave more accurate predictions than existing bulk LST formulae. Results indicate that LT-MOD may have practical utility at sites where access to equipment is limited and where reliable estimates of LST are required over extended periods.