کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6383281 1626146 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research papersA hybrid approach to model shoreline change at multiple timescales
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Research papersA hybrid approach to model shoreline change at multiple timescales
چکیده انگلیسی


- Reliable method to determine shoreline evolution is very important for beach management.
- Shoreline evolution models provide useful information on shoreline change at a range of timescales.
- A novel beach shoreline evolution model was developed using a hybrid approach.
- The approach provide a method to distinguish crossshore and longshore sediment transport contributions to shoreline change.

The paper describes the development of a hybrid behaviour-oriented/data-driven shoreline evolution model. The model is based on a form of advection-diffusion formulation widely known to describe shoreline change. The approach breaks down the model governing equation into two parts, one describing the contribution from time-averaged wave-driven processes through a spatially varying diffusion coefficient and the other describing time-varying wave contributions and all other processes that contribute to shoreline change, through a source function. Both the diffusion coefficient and the source function are site-specific and unknown. Historic incident wave measurements are used to determine the diffusion coefficient at a given site. The source function is derived by the inverse solution of the model governing equation using historic shoreline surveys. The method is demonstrated for Colwyn Bay beach at Conwy Bay in North Wales, UK. For drift-dominated shorelines, the technique can isolate the contributions of cross-shore and long-shore transport to shoreline change over a range of timescales, which is critical in implementing coastal defence measures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Continental Shelf Research - Volume 66, 1 September 2013, Pages 29-35
نویسندگان
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