The Study of Flood Risk in Western Azerbaijan Province Sub-basins Using GIS

Flood is one of complex and destroyed phenomenon. Generally flood risk determines flood situations in each basin. Iran country have a arid climate that rainfall with high density is the main climatic features and caused many floods with destruction human, buildings and engineers structures. The object of this study is the analysis of flood situations in sub-basins of westerns Azerbaijan province. To do this statistics of flood hazards and destruction analyzed.MethodologyWesterns Azerbaijan province located in the north west of Iran and have a temperate climate with rainy season in winter and autumn. Data used in this study are lithology, slope gradient, thickness of materials, humidity coefficient and rainfall rate, temperature, land use. Other data were used isSatellite data including ETM images of 2005 studied and using color composite images of 7, 4 and 1 bands recognized. Then in order to flood susceptibility areas take places with high accuracy, Straher method for river classification were used. Using this classification for each of these classes, one area titled hazard flood area calculated in GIS environment and finally Qal geology formation added this area from geology map scaled 1:100000. In next step in order to calculation of flood intensity used historical flood records.