University of Tabriz Journal of Hydrogeomorphology 2383-3254 12 42 2025 03 21 Flood hazard modeling using the weight of evidence (WOE) method in the Azarshahr Chai basin Flood hazard modeling using the weight of evidence (WOE) method in the Azarshahr Chai basin 37 20 18123 10.22034/hyd.2024.60081.1723 FA Mohammad Hossein Rezaei Moghaddam Professor of Geomorphology, Department of Geomorphology, University of Tabriz and Iranian Hazardology Association,Tabriz, Iran Davoud Mokhtari Professor of Geomorphology, Department of Geomorphology, University of Tabriz, Tabriz, Iran. Tohid Rahimpour Postdoctral researcher of Geomorphology, Department of Geomorphology, University of Tabriz,Tabriz, Iran Vahideh Taghizadeh Teimourloei PhD Student of Dept of Geomorphology University of Tabriz Journal Article 2024 01 14 Azarshahrchai catchment area, located on the western slope of the Sahand mountain range, is formed by the connection of numerous tributaries flowing in deep valleys, and every year in the spring season, with the onset of rains, floods occur in these valleys. The purpose of this research is to evaluate the performance of the weighted evidence (woe) function for preparing the flood susceptibility map of the Azarshahr Chai catchment area. In order to reach the mentioned goal, first, the location of 82 flood catch points using Landsat8.c2.l2 satellite images based on the flood of April 2016 was randomly divided into two groups of 70% (57 flood catch points) for training data and 30 percent (25 points) flood) was used for validation data. Then 14 effective factors in flood occurrence elevation, slope, Aspect, slope curvature, distance to river, distance to road, river density, TWI (topographic moisture index), lithology, soil type, rainfall, and NDVI in Arc software environment and land use in ENVI5.3 software environment, analysis, and location of flood catch points in all 14 factors were investigated. The ROC operating characteristic curve was used to validate and correct the results obtained. The results of the research indicate that 19.56% of the basin is in the very high sensitivity class, 19.18% in the high sensitivity class, 24.61% in the moderate class, 21.94% in the low class and 14.68% in the shallow class in terms of flood vulnerability. Azarshahrchai catchment area, located on the western slope of the Sahand mountain range, is formed by the connection of numerous tributaries flowing in deep valleys, and every year in the spring season, with the onset of rains, floods occur in these valleys. The purpose of this research is to evaluate the performance of the weighted evidence (woe) function for preparing the flood susceptibility map of the Azarshahr Chai catchment area. In order to reach the mentioned goal, first, the location of 82 flood catch points using Landsat8.c2.l2 satellite images based on the flood of April 2016 was randomly divided into two groups of 70% (57 flood catch points) for training data and 30 percent (25 points) flood) was used for validation data. Then 14 effective factors in flood occurrence elevation, slope, Aspect, slope curvature, distance to river, distance to road, river density, TWI (topographic moisture index), lithology, soil type, rainfall, and NDVI in Arc software environment and land use in ENVI5.3 software environment, analysis, and location of flood catch points in all 14 factors were investigated. The ROC operating characteristic curve was used to validate and correct the results obtained. The results of the research indicate that 19.56% of the basin is in the very high sensitivity class, 19.18% in the high sensitivity class, 24.61% in the moderate class, 21.94% in the low class and 14.68% in the shallow class in terms of flood vulnerability. https://hyd.tabrizu.ac.ir/article_18123_dda353b47a84d2b38178eb934fd8d03a.pdf