lidBathy · Nearshore bathymetric inversion from lidars during extreme events
„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“
- Период
- 2021-03-01 → 2023-08-31
- Финансиране от ЕС
- 220 959 €
- Участници
- 2
- Схема
- MSCA-IF
Линиите свързват координатора с партньорите.
Накратко на български
Динамиката на пясъчните плажове по време на бури се изследва чрез лазерно сканиране (лидар) на повърхността на морето. Това помага за по-доброто разбиране на движението на седиментите и подобрява прогнозите за промените по крайбрежието.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Nearshore bathymetric inversion from lidars during extreme events
The coastal science community currently lacks insights into the rapid morphological evolution of sandy beaches during storms. Sediment exchanges occurring between the subaerial and subaqueous regions of the beach under the action of storm waves are poorly understood, and as a consequence, our capacity to predict the evolution of wave-dominated coastlines remains limited. This is partly explained by the difficulty to measure the seabed elevation under broken waves, and its evolution through time, with sufficiently high spatial resolution in storm conditions. The overarching goal of the lidBathy project is to study the sediment exchanges occurring at the sea/land interface during storms by developing new approaches to remotely map the nearshore topography and bathymetry, and its evolution through time. Such mapping will be performed with lidar scanners, which are remote sensors capable of safely and directly measuring both the intertidal beach topography and the spatio-temporal evolution of ocean waves propagating and breaking in the nearshore region. As opposed to the intertidal region, the seabed elevation over the submerged region will be estimated indirectly, i.e. via so-called depth-inversion procedures. Current solutions for depth-inversion are based on linear wave theories that are not adapted to the breaking region. Developing a new approach that accurately embeds waves non-linear dynamics is the core of the lidBathy project. The project was organised in three Work Packages (WP), each addressing one of the three objectives (O) that contribute to the overarching goal of lidBathy: O1. Develop a universal formula inferring the water depth h from incident wave properties that can be extracted from surface elevation measurements. O2. Develop lidBathy, a new depth-inversion tool based on lidar technology and assess its accuracy with innovative field datasets collected at Narrabeen, Australia and the Field Research Facility (FRF) at Duck NC. O3. Analyse the morphological response of sandy beaches to storms using lidar datasets of past events at the FRF and Narrabeen-Collaroy permanent stations.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
The coastal science community currently lacks insights into the rapid morphological evolution of sandy beaches during extreme events. Sediment exchanges occurring between the subaerial and subaqueous regions of the beach are poorly understood, which is explained by the difficulty in measuring the seabed elevation under broken waves with sufficiently high spatial and temporal resolution. The lack of datasets which capture beaches morphological evolution limits the development of accurate numerical models for the morphological evolution of beaches and hence our capacity to predict their long-term evolution. To overcome these challenges, this project will develop lidBathy, a bathymetric inversion tool which uses high-resolution 2D lidar scans of surf zone waves. Lidar scanners have the unique capacity to directly measure both the intertidal beach topography and the sea surface elevation at high spatial (O(cm)) and temporal (O(s)) resolution. Long-range lidar and bathymetric data collected at Narrabeen (Australia) and the Field Research Facility (Duck, N.C.) will be used to validate lidBathy. Lidar data collected at these two sites during past storms will be used to create an unprecedented dataset of beach morphological evolution, in both the subaerial and subaqueous regions, during extreme events. This project will characterize sediment exchanges occurring between the swash and the surf zones by studying the role of surf zone wave properties, water levels, swash statistics and time-varying beach slope. This will provide the first study into the response of the beach system to extreme events at high spatial and temporal resolution at the two most heavily monitored sites worldwide.
Оригинален текст от CORDIS (на английски).
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Данни: CORDIS, © Европейски съюз