Assessment of Moraine Cliff Spatio-Temporal Erosion on Wolin Island Using ALS Data Analysis

Abstract

The aim of the article is to present the temporal and spatial variability of the cliff coast erosion of the Wolin Island in 2012–2020 in three time periods (2012–2015, 2015–2018, 2018–2020). The research used data from airborne laser scanning (ALS), based on which DEM models were made. Based on the differences between the models, the amount of sediment that was eroded by the sea waves was determined. The conducted research showed that, in the analyzed period, the dynamics of the Wolin cliffs were characterized by high variability. The greatest erosion was observed on sandy cliffs, and the smallest on clay cliffs and on cliffs that are densely covered with vegetation. In the sediment budget studies, two seashore erosivity indicators were proposed: length-normalized sediment budget (LB) (m3/m) and area-normalized sediment budget (AB) (m3/m2). The average annual dynamics of the cliff edge erosion on the Wolin Island was found to be LB = 6.6 ± 0.3 m3/m/a, AB = 0.17 ± 0.01 m3/m2/a. The results obtained are comparable with other postglacial cliffs. The use of the differential analysis of DEM models allows for the determination of the dynamics of the cliff coast and may be used in spatial development and planning of seashore protection zones.

Spatio-Temporal Morphodynamics of a Nourished Sandy Shore Based on LiDAR Measurements

“…In the next step of the analysis, within each 100 m length segment of the active coastal zone, the average total volume of the segment coast changes (∆q) over time was determined. A similar method has already been used elsewhere on the Polish coast-in the Wolin Island region [21]. The periods of analyzed changes over time corresponded to data availability, meaning differences in coastline volume were determined between moments in time when successive measurements were conducted.…”

“…Previously, these data were utilized in research on the assessment of coastal morphodynamics in Western Pomerania (Southern Baltic) [17,18] and nearshore bathymetry [19,20]. In particular, the assessment of spatio-temporal erosion of the moraine cliff on Wolin Island was conducted utilizing methods for determining beach volume similar to those employed in this study [21]. A promising emerging technique for acquiring high-resolution topographic and bathymetric data within coastal zones is Unmanned Aerial Vehicle (UAV)based photogrammetry, especially combined with satellite observations.…”

How does ski infrastructure change soil erosion processes on hillslope?

“…DoD analyses were conducted at the following intervals: 2012–2016 (data from ALS), 2016–2022 (data from ALS and geodetic measurements). To determine minimum level of detection (minLoD), we calculated root mean square error (RMSE), mean error (ME) and standard deviation of error (SDE), according to the formulas presented by Höhle and Höhle (2009) (Table 3) The miniLoD determines which values indicate a real change and which may be attributed to the elevation error of individual DEMs (Blasone et al, 2014; Buckley & Mitchell, 2004; Fidelus‐Orzechowska et al, 2018; Winowski et al, 2022). Error analyses were calculated for reference points.…”

Effects of geomorphological processes and phytoclimate conditions change on forest vegetation in the Pomeranian Bay coastal zone (Wolin National Park, West Pomerania)

“…The point cloud density ranged from 3 pts • m −2 to 8 pts • m −2 . Owing to these data it was possible to delimit cliff sections of different erosion dynamics (m 3 • m −1 • a −1 ): low ≤5.25, moderate 5.26-9.50, high 9.51-13.75 and very high >13.75 (Winowski et al 2022).…”