Quantifying uncertainty in wave attenuation by mangroves to inform coastal green belt policies

Data belonging to the article 'Quantifying uncertainty in wave attenuation by mangroves to inform coastal green belt policies' by van Wesenbeeck et al., 2025 (https://doi.org/10.1038/s43247-025-02178-4)

To quantify confidence in wave reduction capacity of mangroves for wind and swell waves a large number of numerical model simulations is run with the model SWAN. A detailed description of the methods and the results can be found in the article. 

FILES

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A - WAVE ATTENUATION VERSUS MANGROVE WIDTH

- data_wave_attenuation_versus_mangrove_width_percentiles.csv

- wave_attenuation_versus_mangrove_width_percentiles.png

Commma separated file containing the data behind the percentile lines of the

relationship between wave attenuation by mangroves as function of the mangrove

width. 

columns:

x_meters meters from the start of the mangrove forest

p5 5 percentile

p50 50 percentile (median)

p95 95 percentile

B HYDRODYNAMIC INPUT DATA

- locs.pkl

Pickle file that can be opened with the Python package Pandas.

The file contains hydrodynamic inputs for the SWAN modelling and are

based on 1000 selected locations originated from the van Zelst et al., (2021) (article: 10.1038/s41467-021-26887-4  data: 10.5281/zenodo.2525658).

columns:

hs{rp} Significant wave height (offshore) [m]

tp{rp}  Peak wave period [s]

ss{rp}  Extreme water level [m +MSL]

the values are available for four return periods (2,5,10,25)

C WAVE HEIGHT IN THE FOREST (SWAN OUTPUT)

- wave_attenuation_in_mangrove_forest_vegz_50cm.nc (1GB)

- wave_attenuation_in_mangrove_forest_vegz_0cm.nc (1GB)

NetCDF file containing the Significant wave height (Hs) outputs within the mangrove green belt 

corresponding to the scenarios. 

The suffix _50cm and _0cm corresponds to the depth of the mangrove forest with respect to MSL. 

Coordinates:

loc    0-1000 locs (referring to the hydrodynamic input as described in locs.pkl)

veg_type   0 1 2 (referring to the mangrove schematizations; pioneer, red, black)

veg_state  0 1 2 (sparse, medium, dense)

fs_slope   500, 750 , 1000 (foreshore slopes)

return period (2,5,10,25)

x          index of grid 0 - 1200. The grid size is 5 m, thus 6 km in total. 

D - WAVE PROPAGATION RELATIVE TO DISTANCE FROM START OF THE MANGROVE FOREST

- wave_propagation_relative_to_distance_from_the_start_of_the_mangrove_forest.csv

- wave_propagation_relative_to_distance_from_the_start_of_the_mangrove_forest.png

Commma separated file containing the data behind the percentile lines of the

relationship between wave propagation relative to distance from the start of the mangrove forest. 

columns:

x        =  relative distance to the start of the forest (%)

p5     =   5 percentile

p50   = 50 percentile (median)

p95   = 95 percentile

E MANGROVE SCHEMATIZATIONS

- mangrove_schematizations.png

- pioneers.csv

- rhizophora.csv

- avicennia.csv

First column: height (hv) in meters

Second column: vegetation factor (Vfac= bv * Nv [1/m]