Akademik Veri Yönetim Sistemi
7th International Conference on Cartography and GIS, Burgas, Bulgaristan, 18 - 23 Haziran 2018, ss.755-761
The aim of this study is to examine the advantages of the Airborne Light Detection and Ranging (LiDAR) integrated
with Geographical Information Systems (GIS) in hydrologic modelling. Balcı Stream Basin is selected as study area,
lying within the boundaries of Borçka district of Artvin city in the northeast of Turkey.
Types of data used in the study are as follows: LiDAR point cloud, Ground Control Points (GCPs) derived from Global
Positioning System (GPS) in the field study and finally LANDSAT 8 satellite image for determination of land use.
TerraScan, TerraModeler and TerraPhoto softwares are used in laser point cloud filtering, classification, modelling
and accuracy analysis; while ArcGIS, Surfer, Global Mapper and Erdas Imagine softwares are used for integration
with Geographic Information System and hydrologic modelling.
Hydrologic modelling requires high resolution elevation data, with relevant vertical and horizontal accuracies and the
basic data form for this is a Digital Terrain Model (DTM). For this purpose, Digital Elevation Model (DEM), Digital
Surface Model (DSM) and DTM were generated from classified LiDAR data with triangulation process, respectively. As
a result of the modelling process LiDAR DTM represented the topography of Balcı Stream Basin very accurately, which
has a very steep slopped and dense vegetated character with a vertical accuracy of 0.1855 m., owing to the advantage
of LiDAR: easily extraction of non-ground objects from the data. In the hydrologic modelling phase; LiDAR DTM was
integrated with GIS and flood peak discharge value (Qp) was calculated. Resulting Qp value was quite close to the
reference value.