Spatial pattern analysis of post-fire damages in the Menderes District of Turkey

作者：Emre COLAK,Filiz SUNAR

摘要：Forest fires,whether caused naturally or by human activity can have disastrous effects on the environment.Turkey,located in the Mediterranean climate zone,experiences hundreds of forest fires every year.Over the past two decades,these fires have destroyed approximately 308000 ha of forest area,threatening the sustainability of its ecosystem.This study analyzes the forest fire that occurred in the Menderes region of Izmir on July 1,2017,by using pre-and post-fire Sentinel 2(10 m and 20 m)and Landsat 8(30 m)satellite images,MODIS and VIIRS fire radiative power(FRP)data(1000 m and 375 m,respectively),and reference data obtained from a field study.Hence,image processing techniques integrated with the Geographic Information System(GIS)database were applied to a satellite image data set to monitor,analyze,and map the effects of the forest fire.The results show that the land surface temperature(LST)of the burned forest area increased from 1 to 11°C.A high correlation(R=0.81)between LST and burn severity was also determined.The burned areas were calculated using two different classification methods,and their accuracy was compared with the reference data.According to the accuracy assessment,the Sentinel(10 m)image classification gave the best result(96.43%for Maximum Likelihood,and 99.56%for Support Vector Machine).The relationship between topographical/forest parameters,burn severity and disturbance index was evaluated for spatial pattern distribution.According to the results,the areas having canopy closure between 71%–100%and slope above 35%had the highest burn incidence.As a final step,a spatial correlation analysis was performed to evaluate the effectiveness of MODIS and VIIRS FRP data in the postfire analysis.A high correlation was found between FRPslope,and FRP-burn severity(0.96 and 0.88,respectively).

发文机构：Civil Engineering Faculty

关键词：remotesensingGISspectralindicesdisturbanceindexlandsurfacetemperatureburnseverity

分类号： TP3[自动化与计算机技术—计算机科学与技术]