Tidal and seasonal controls on the stratigraphic architecture of blind tidal channel deposits in the fluvial-tidal transition of the macrotidal Sittaung River estuary, Myanmar

This directory contains the following drone-derived datasets collected between 2015 and 2017 in the Sittaung River estuary, Myanmar. The dataset indicates that the blind tidal channels in the distal part of the fluvial-tidal transition zone in the Sittaung River estuary experienced rapid infilling over the time period. Georeferenced orthophotomosaics were collected annually and processed to produce digital elevation models (DEMs) using Pix4D. Sediment volume changes between the specific periods were calculated by subtracting the two DEMs corresponding the periods (e.g., 2017_2015_dod_low.tif is the difference between 2017_12_DEM_low.tif and 2015_12_DEM_low.tif. We uploaded tiff files with reduced resolution (10 cm) due to large file size for original tiff files for DEM and DoD analysis. The resolution of raw tiff files are 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. We uploaded orthophotomosaics with full resolution. Drone_derived datasets - Figure 15 - A time series of orthophotomosaics, DEMs, and DoD at KY4 in 2015, 2016, 2017

本目录收录了2015至2017年间于缅甸锡当河（Sittaung River）河口采集的系列无人机衍生数据集。本数据集表明，锡当河河口河潮过渡带远端的盲潮道在该观测时段内经历了快速淤积过程。研究人员每年采集地理参考正射影像镶嵌图（georeferenced orthophotomosaics），并使用Pix4D软件处理生成数字高程模型（Digital Elevation Models, DEMs）。通过对对应时期的两幅DEM进行差值运算，可计算得到特定时段间的沉积物体积变化：例如，2017_2015_dod_low.tif即为2017_12_DEM_low.tif与2015_12_DEM_low.tif的差值结果。鉴于DEM与差异数字地形模型（Difference of Digital Elevation Models, DoD）分析所用原始TIFF文件体积过大，我们上传了分辨率降至10厘米的精简版TIFF文件。原始TIFF文件的分辨率低于2厘米。尽管降低了文件分辨率，但DoD分析的均方根误差未出现显著升高。原始TIFF文件可根据申请提供。我们同时上传了全分辨率的正射影像镶嵌图。无人机衍生数据集——图15：2015、2016、2017年KY4站点的正射影像镶嵌图、DEM及DoD时间序列。