The Role of Basin Morphometric Features in Flood Output: A Case Study of the Biga River Basin

Abstract

This study aims to investigate the causes behind the constant flooding in the Biga River basin. It aims to determine if the river sub-basins's morphometric features was the reason behind the floods. Historical data from previous floodings were used to create the linear (one-dimensional), areal (two-dimensional), and relief (three-dimensional) morphometric properties of the sub-basins. These parameters were then evaluated quantitatively and a Digital Elevation Model (DEM) with 10 m resolution produced from 1:25000 scale topography maps as the base data. The D8 flow and Strahler methods were alos used as part of this study.The values obtained from the sub-basins of the Biga River were then weight and the potential to generate floods on the main stream of the sub-basins were evaluated. Our final conclusion indicates that the Biga sub-basin has indeed a major effect on flooding of the main channel of the Biga River.