Abstract:
The study aims to explore the spatial and temporal dynamics of wildfires and landslides and their relationship in Yunnan Province, providing a scientific basis for disaster prevention and control. Using wildfire and landslide occurrence data from 2006 to 2016 in Yunnan Province as the study area, GIS hotspot and kernel density methods were used to analyze the spatiotemporal characteristics of disasters, and the correlation matrix method was used to examine the spatiotemporal relationship between wildfires and landslides. The results show that both wildfires and landslides in mountainous areas gradually evolved from a large-scale discrete distribution to small-scale clustered patterns over the study period. The overall kernel densities of wildfires and landslides across all prefectures and cities were 1.01×10
−2 and 3.09×10
−2 points per square kilometer, respectively, with higher landslide densities in Zhaotong and Baoshan. Wildfires mainly occur in Xishuangbanna and Pu'er in southern Yunnan, Qujing in eastern Yunnan, and northwest Yunnan. A positive correlation was found between ildfire and landslide occurrences, with a correlation coefficient of about 0.46. It can be concluded that there is a specific spatial coupling relationship between wildfires and landslide sites. Ecological restoration should be carried out promptly to prevent secondary landslides during wildfires. The study reveals the relationship between wildfires and landslides in Yunnan, providing a theoretical basis for post-fire ecological restoration, landslide disaster prevention and control, and the prevention of other secondary disasters in Yunnan's mountainous areas.