کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5780757 1635355 2017 33 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Video monitoring of sandbar-shoreline response to an offshore submerged structure at a microtidal beach
ترجمه فارسی عنوان
نظارت تصویری پاسخ شن و ماسه به ساحل دریای میکروتدین به ساختار غرق شده دریایی
کلمات کلیدی
ساندویچ های نزدیک به سرزمین، تغییر ساحل، ساختار زیرزمینی، اتصال کوتاه سورتمه،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
In early 2013, an 800-m long and 12-m wide submerged breakwater with its crest in 2-m depth was implemented at the wave-dominated barred beach of Sète, SE France, to fight against erosion and submersion hazards. Daily video images from April 2011 to April 2016 covering an alongshore distance of 3.5 km are used to analyse the response of both the sandbar(s) and the shoreline to the structure implementation. Results show that the breakwater had a profound impact on the nearshore system, both shoreward of the structure and well away from it alongshore. A progressive rotation and linearisation of the sandbar was observed shoreward of the submerged breakwater. This resulted in the splitting of the sandbar adjacent to the structure during a net offshore sandbar migration event driven by a severe storm in December 2013. The typical formation of a salient or tombolo was not observed. Instead, shoreline coupled to the sandbar geometry, which resulted in a slight seaward migration of the shoreline in front of the structure. Overall, this study highlights that the role of the sandbar is critical to shoreline response to the implementation of breakwaters on barred beaches.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geomorphology - Volume 295, 15 October 2017, Pages 297-305
نویسندگان
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