Morphodynamic evolution of paraglacial spit complexes on a tide-influenced Arctic delta (Dicksonfjorden, Svalbard)

Published: 2 August 2021| Version 1 | DOI: 10.17632/xmgbv8ng79.1
Contributors:
Kyungsik Choi,
,
,

Description

This directory contains the following drone-derived datasets collected between 2016 and 2019 at the head of Dicksonfjorden, Svalbard. The dataset indicates that the spit morphodynamics on the tidal flats at the head of Dicksonfjorden display a variability in time and space. Georeferenced orthophotomosacis were collected annually and processed to produce digital elevation models (DEMs) using Pix4D. Sediment volume changes between years were calculated by substracting the two DEMs corresponding each year (e.g., DoD_2019_2018_D.tif is the difference between DEM_2019_D.tif and DEM_2018_D.tif). Files in Figure 6, Figure 8, Figure 11, Figure 13 folders include DEM and DoD of spits analyzed in the study. Due to large file size for original tiff files (typically greater than 1 GB), we uploaded tiff files with reduced resolution (10 cm). The resolution of the original tiff files is less than 2 cm. Despite the reduced file resolution, there is no significant increase in root mean square errors for DoD analysis. The original tiff files are available on request. DRONE_DERIVED DATASETS Figure 6 _DEM and DoD of Spit 0 (upfjord area) - DEM_spit_0_2016.tif (Figure 6A), DEM_spit_0_2017.tif (Figure 6B), DEM_spit_0_2018.tif (Figure 6C), DEM_spit_0_2019.tif (Figure 6D), DoD_2018_2017_spit_0.tif (Figure 9E), DoD_2019_2018_spit_0.tif (Figure 9F), DoD_2019_2017_spit_0.tif (Figure 9G). Figure 8 _DEM of spits 1-5 (downfjord area) - DEM_spits_1-5.tif (Figure 8A), DEM_spits_1-3_2016.tif (Figure 8B), DEM_spits_1-3_2017.tif (Figure 8C), DEM_spits_1-3_2018.tif (Figure 8D), DEM_spits_1-3_2019.tif (Figure 8E), DEM_spits_4-5_2016.tif (Figure 8F), DEM_spits_4-5_2017.tif (Figure 8G), DEM_spits_4-5_2018.tif (Figure 8H), DEM_spits_4-5_2019.tif (Figure 8I). Figure 11_DoD of spits 1-5 (downfjord area) - DoD_2017_2016_spits_1-3.tif (Figure 11A), DoD_2018_2017_spits_1-3.tif (Figure 11B), DoD_2019_2018_spits_1-3.tif (Figure 11C), DoD_2019_2016_spits_1-3.tif (Figure 11D), DoD_2017_2016_spits_4-5.tif (Figure 11E), DoD_2018_2017_spits_4-5.tif (Figure 11F), DoD_2019_2018_spits_4-5.tif (Figure 11G), DoD_2019_2016_spits_4-5.tif (Figure 11H). Figure 13_DEM and DoD of cliff - DEM_cliff_2018.tif (Figure 13A), DEM_cliff_2019_JUL_2019.tif (Figure 13B), DEM_cliff_2019_AUG_2019.tif (Figure 13C), DoD_2019_JUL_2018_cliff.tif (Figure 13D), DoD_2019_AUG_2018_cliff.tif (Figure 13E).

Files

Steps to reproduce

Drone-derived datasets were obtained by repeated UAV surveys on the microtidal tidal flats in Dicksonfjorden, Svalbard. Drone-captured images were all georeferenced by implementing the RTK-GPS survey. The images were rectified and processed to produce digital elevation models (DEMs) using Pix4D (version 4.0.25). To quantify morphological changes and sedimentation, DEMs were obtained repeatedly on a seasonal basis over the four years. By subtracting the DEMs between the two periods, sediment volume change such as erosion and deposition can be quantified. Also, geomorphic changes such as upfjord and landward migration of spits can be detected by comparing the time-series of the DEMs.