Morphometric Analysis of Drainage Basin with Geographic Information Systems (GIS): A Case Study of Porsuk Stream Basin Eskisehir, Western Anatolia, Türkiye

It is a mathematical expression of the formal and dimensional measurements of terrain and landforms using morphometric indices. Morphometry analysis performed using Geographic Information Systems (GIS) is a practical and applicable technique widely used in watershed characterization studies. The objective of the present study is to analyze the morphometric characteristics of the Porsuk Stream Basin, one of the sub basins of the Sakarya Basin, by using Geographic Information Systems (GIS). Shuttle Radar Topography Mission (SRTM) Digital Elevation Model (DEM) data with 30 m resolution were used in the study. Relief, areal and linear morphometric features of the basin were analyzed with ArcGIS 10.8 software over DEM data that will form the basis for the studies. Morphometric parameters such as as bifurcation ratio, stream length ratio, stream frequency, drainage density, gravelius index, drainage texture, basin relief, ruggedness value, hypsometric curve and hypsometric integral were calculated in the basin, elevation, slope, aspect and land use analyses were performed and thematic maps reflecting the morphology of the area were created. The findings obtained from the study contain information to characterize the basin morphometry and provide data that will form the basis for basin management and planning studies to be carried out in different subjects in the region in the future.