Detection of the Bathymetry and Shoreline of Terkos Lake- Turkey Using Digital Image Processing and GIS

Abstract

ABSTRACT Bathymetry can be defined as the study of water depth, in other words, it is the topography of the bed of sea, ocean and lake floor. In this study, the bathymetry of Terkos lake northern of Istanbul-Turkey was prepared using field work points and remote sensing data. More than 70,000 eco-sound points were collected; manipulated and entered to GIS geodatabase in order to create the bathymetric map, digital Image processing for remote sensing data was also used to produce the map. The shoreline of the lake was detected using Iso Cluster unsupervised classification tool in spatial analyst arc tool from the most recent satellite image captured by Landsat 9 in 25th of March 2022. ARCGIS geodatabase was built in order to create a 0.5m interval bathymetric contour lines showing the bathymetry of the Terkos Lake bed. The Lake level, surface area, water volume curve for the lake was drawn using the results of lake water budget analysis. Results show the possibility of using remote sensing data as an aid to assist in field work related to the production of bathymetric maps, these maps give an indication to decision maker for the amount of sediment in the lake, water bodies data bank also provides a dynamic database of related measurements as surface area, water volume knowing the water level.