Flood risk microzonation using IWPCA mathematical model, case stady: firoozabad Basin in Fars province, Iran

Flooding is a serious global problem, so as its intensity and frequency increase, global concerns in terms of loss of fatalities and economic losses associated with this phenomenon also increase.. In this research, were used Landsat 8 image satellite, DEM30 SRTM, annual precipitation statistics of Rain gauge stations and geological layer 1:10000.Then, in order to analyze the effective parameters in flood risk, two methods, IWPCA,respectively were used in MATLAB, and ARCGIS software. In the next step, in order to validate the two methods, the OLS method was used to validate the mentioned model. The final flood hazard is modeled (at the last stage, the least-square method was used to test the mentioned models.The weighted linear combination (WLC) method was used for spatial modeling and layer combination to prepare potential flood maps. The results of Flood Risk Zoning with IWPCA was presented. The flood rates by IWPCA model was about 147 km2 of the watershed, respectively. The value of this parameter in the central and northern parts was higher than in other regions. Finally,the validation of the model showed that IWPCA with R2 and P-value of 0.76 and 0.0001 had the highest degree of agreement between the dependent and independent variables.