Risk zoning on forest fire along the power transmission lines in Hubei Province based on GIS

Taking the power transmission lines in Hubei Province as a research object, we select land type, terrain, water buffer area, settlement buffer area, and transmission line buffer area as risk zoning ranks on forest fire based on the analysis of evaluation factors on forest fire and the practical circumstances in Hubei. Based on RS(Remote Sensing) and GIS(Geographic Information System), we quantitatively evaluate the forest fire risk along the power transmission lines in Hubei Province by using AHP and factor weights union method. The results show that the areas of the high and extremely high fire risk zones cover more than 55% of the total area of Hubei Province, which lead to a high forest fire hazard risk in general. There is a clear fire danger division distribution. The transmission lines with higher fire risk grade are situated in the eastern and northern part of western Hubei, northern Hubei, northern Jianghan plain, and the northern and southern part of eastern Hubei. The forest fire risk of a corridor along 1 000 k V transmission lines is relatively high, while that along 200 k V transmission lines is relatively low. Compared with the locations of 44 historical transmission line fire cases in Hubei Province, their locations are found to be in the high risk zones.