Spatial and Temporal Distribution of Wildfires and Landslides and their Relationship in Yunnan Province

The study aims to explore the spatial and temporal dynamic patterns of wildfires and landslides, and their relationship in Yunnan Province, providing a scientific basis for disaster prevention and control. Taking the locations of wildfires and landslides in Yunnan Province from 2006 to 2016 as the objects, GIS hotspot and kernel density methods were used to analyze the spatiotemporal characteristics of disasters, and the correlation matrix method was used to explain the spatiotemporal relationship between wildfires and landslides. The results show that wildfires and landslides in mountainous areas gradually evolved from a large-scale discrete distribution to a small-scale clustered distribution. The overall kernal densities of wildfires and landslides in various prefectures and cities were 1.01 × 10⁻² points per square kilometers and 3.09 × 10⁻² points per square kilometers, 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. Wildfire occurrences showed a positive correlation with landslide disasters, 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 timely to avoid secondary landslide disasters when wildfires occur. 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.