The Shoreline Bathymetry Assessment Using Unmanned Aerial Vehicle (UAV) Photogrammetry

Abstract

The shoreline is the boundary between land and sea. The shoreline has an irregular nature and change due to tidal conditions. Shoreline changes occur due to human activity and natural environment that results in eradication of erosion and sediment in the shoreline. UAV as a tool used to identify the shoreline change. However, the measurement of large-size reclaimed land using terrestrial survey methods, such as total station and GPS requires a huge number of efforts in terms of time and labour spending. Although, the current method is good in airborne sampling, however it is quite expensive and more complicated to handle. The objectives of this study is to identify the shoreline change from the image taken by using Unmanned Aerial Vehicle (UAV) and to analyse the data using pix4Dmapper and Global Mapper. Planning flight plans for UAV is necessary in this study. The shoreline changes are visibly clear during low tide from July to October 2018. Total length of erosion for three months from July to October 2018 is 8.428 m. Since the aim of this study was successfully achieved, using UAV photogrammetry could be applied in many fields and in determining and identifying the shoreline change.

Short-Term Shoreline Evolution Mapping by using UAV

“…A three-dimensional model image will be created by automatically assembling each of these images following their original placements. This point cloud verifies the accuracy of the GCP position and the model [23,24]. The calibration is used to produce orthomosaic photos that are accurate to each image in terms of latitude, longitude, and height.…”

Selected methods for determining inconclusively identifiable shorelines of watercourses and lakes

“…Capturing and understanding the shoreline change trends in a coastal management context is critical for a range of scientific, engineering, and management questions (Astsatryan et al, 2022). The stability of shorelines is ceaselessly beneath threat due to changes to the natural environment caused by the wind, waves, tides, and currents, and also because of human intervention that results in changes in the dynamic equilibrium prevalent at a given coastal stretch (Kaamin et al, 2020).…”