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Wave overtopping and overflow hazards: application on the Camargue sea-dike

Dike breaches occurs regularly during storm events. This phenomenon contributes to amplify considerably the impact of floods on coastal areas. It represents an important cost for repairing…
Gumbel copula built from ANEMOC and REFMAR dataset and by fitting events with a Generalized Extreme Value Distribution (GEV)

Improving storm surge and wave forecasts from regional to nearshore scales

Submersion risks assessment requires different tools and methods from regional to coastal scales. The Shom’s strategy relies on numerical modelling and observational systems applied in a…
. 100- year return levels for Skew Surge observations (left), 100- year return levels for Hs observations (center) and 100- year return level errors for Skew Surge and Hs (right).

Timescale of emergence of chronic flooding in the major economic center of Guadeloupe

Sea-level rise due to anthropogenic climate change is projected not only to exacerbate extreme events such as cyclones and storms but also to cause more frequent chronic flooding occurring at high…
The Petit Cul-de-sac marin area in Guadeloupe, showing urbanized areas and altitudes (map created by BRGM; data: IGN, SHOM; © BRGM, IGN, SHOM).

Predicting Storm Surges

In this chapter, we present a second example of statistical estimation of extreme quantiles: millennial quantiles for storm surges at Brest (France), based on hourly sea-level measurements. We run…
Extreme Value Theory with Applications to Natural Hazards From Statistical Theory to Industrial Practice

Advances in estimating Sea Level Rise: A review of tide gauge, satellite altimetry and spatial data science approaches

Significant developments have been made in the observation systems and techniques of estimating sea level towards meeting the standard accuracy requirement of Global Climate Observation Systems (…
Graphical abstract

Hourly sea level height forecast based on GNSS-IR by using ARIMA model

Multi-satellite and Multi-Signal-to-Noise Ratio (SNR) types provide more basic data for the monitoring of sea level height by Global Navigation Satellite System Interferometric Reflectometry (GNSS…
Diagram of the compensation hourly average sea level height retrieved by GNSS-IR technology and sea level height predicted 24 h by 1 tide cycle with the measured height of the tide gauge and its correlation analysis chart (The red scatter in (a) is the mean sea level height obtained after preprocessing, the cyan scatter is the result obtained by interpolation, and the purple scatter in (b) is the results predicted by 1 tide level period for 24 h. The color bar represents the density of points. Moreover

Spatio-temporal variability of the morpho-sedimentary dynamics observed on two gravel beaches in response to hydrodynamic forcing

This article aims to investigate the 3D morpho-sedimentary dynamics of two gravel beaches in relation to hydrodynamic forcing, using a multi-sensor approach. Study sites, namely Etretat and Hautot…
Marine Geology

Etude de l'impact d'une tempête extrême sur la Grande Plage de Biarritz en présence d'une digue amovible en sacs de sable

La Grande Plage de Biarritz a connu plusieurs événements de tempêtes extrêmes ces dernières décennies qui ont causé d’importants dégâts matériels sur les ouvrages et bâtiments situés en front de…
Étude de l’impact d’une tempête extrême sur la Grande Plage de Biarritz en présence d’une digue amovible en sacs de sable

Technical note: On seasonal variability of the M₂ tide

Seasonal variability of the M₂ ocean tide can be detected at many ports, perhaps most. Examination of the cluster of tidal constituents residing within the M₂ tidal group can shed light on the…
Spectrum of sea level at Saint-Malo, on the northern coast of France, focusing on the M2 group but with the central M2 constituent estimated and removed to better delineate the much smaller sidelines. The spectrum is based on 16 years of data. After spectral smoothing, the frequency resolution is approximately 0.2 cpy (or 0.0005 cpd), insufficient to clearly separate MSK2 from Γ2. The seasonal modulation of M2 at Saint-Malo is evidently dominated by the two frictional compound tides, although α2 is also imp

Sensitivity analysis of erosion on the landward slope of an earthen flood defence submitted to wave overtoppings

The study aims to provide a complete analysis framework applied to an earthen dike located in Camargue, France. This dike is regularly submitted to erosion on the landward slope that needs to be…
(a) Picture of the landward slope of the dike made of sand and clay. (b) Water depth of the beach in front of the dike with resolution Δx=3 m. (c) Regional map of western Europe with the location of the dike (red), deepwater wave gauge (green), and sea level records (blue). (d) Regional location of the data sources.