Description
This data is in support of the publication: "Saltmarsh erosion under extreme storm conditions: a full-scale wave flume experiment". In this study, the erosion mechanics of a saltmarsh under extreme storm wave forcing were investigated in a series of full-scale flume experiments conducted in the Deltaflume at Deltares, The Netherlands.
Saltmarsh surface elevation measurements consisted out of a series of point measurements using a Trimble Ri Total Station (TS), and through a full-coverage 3D LiDAR scans using a FARO Focus Premium (FA) LiDAR scanner. Measurements were performed at the start of each experimental day, when water levels were lowered and the saltmarsh surface was exposed. Point measurements with the TS were conducted across multiple locations on the marsh platform to accurately capture surface elevation while vegetation remained intact. Elevation changes were monitored at several fixed locations, with additional measurements taken in areas where significant erosion and vegetation uprooting occurred. When the first extensive erosion occured, full 3D surface elevation was measured using the FA scanner. For each measurement, a scan was made at three locations along the mars. These scans were then merged with an 50 % overlap, aligned and resampled onto a mesh with a 0.02 m resolution in both longitudinal (x) and lateral (y) directions.
In addition to surface elevation measurements, soil samples were collected at the end of the experiment from five sections, each approximately 15 m long, along the marsh. Samples were taken using 5 cm high rings at four depths (10, 20, 30 and 40 cm below the bed), with two replicates per location. Samples were weighed, dried in an oven at 60 degrees for three days, and weighed again, where the dry bulk density is calculated as the dry mass of the sample divided by its volume and the moisture content is determined from the loss in mass that occurs during drying. Roots were carefully separated from the soil by washing over a 0.5 mm mesh, then dried at 60°C for 48 hours, and weighed to determine root biomass.
Saltmarsh surface elevation measurements consisted out of a series of point measurements using a Trimble Ri Total Station (TS), and through a full-coverage 3D LiDAR scans using a FARO Focus Premium (FA) LiDAR scanner. Measurements were performed at the start of each experimental day, when water levels were lowered and the saltmarsh surface was exposed. Point measurements with the TS were conducted across multiple locations on the marsh platform to accurately capture surface elevation while vegetation remained intact. Elevation changes were monitored at several fixed locations, with additional measurements taken in areas where significant erosion and vegetation uprooting occurred. When the first extensive erosion occured, full 3D surface elevation was measured using the FA scanner. For each measurement, a scan was made at three locations along the mars. These scans were then merged with an 50 % overlap, aligned and resampled onto a mesh with a 0.02 m resolution in both longitudinal (x) and lateral (y) directions.
In addition to surface elevation measurements, soil samples were collected at the end of the experiment from five sections, each approximately 15 m long, along the marsh. Samples were taken using 5 cm high rings at four depths (10, 20, 30 and 40 cm below the bed), with two replicates per location. Samples were weighed, dried in an oven at 60 degrees for three days, and weighed again, where the dry bulk density is calculated as the dry mass of the sample divided by its volume and the moisture content is determined from the loss in mass that occurs during drying. Roots were carefully separated from the soil by washing over a 0.5 mm mesh, then dried at 60°C for 48 hours, and weighed to determine root biomass.
| Date made available | 2026 |
|---|---|
| Publisher | TU Delft - 4TU.ResearchData |
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