Remote sensing-based spatial-temporal characteristics of forest grassland fires in Sichuan Province from 2001 to 2021
In recent years,the problem of forest wildfires in Sichuan Province has emerged as a matter of great concern.These wildfires have occurred with alarming frequency,presenting a formidable threat not only to the local ecological security but also to the lives and property of the people and the courageous rescue workers who put themselves in harm's way.This in-depth study is committed to conducting a comprehensive exploration of the temporal and spatial characteristics of forest and grassland fires in Sichuan Province over the extensive period from 2001 to 2021.The ultimate aim is to provide highly valuable and actionable information that can serve as a solid foundation for making well-informed decisions regarding fire prevention and control strategies.By understanding these characteristics,it is hoped that effective measures can be implemented to minimize the occurrence and impact of wildfires,thereby safeguarding the delicate balance of the ecosystem and protecting the well-being of the local population.This extensive research is firmly grounded in a diverse array of multi-source remote sensing fire products,such as MCD64A1,Fire_CCI51,and MCD14ML.Through meticulous extraction of effective fire points,a wealth of regional fire data is painstakingly obtained.Leveraging the power of a sophisticated geographic information system,the temporal trend and spatial distribution of forest and grassland fires are thoroughly examined.This involves analyzing patterns over time and identifying areas of concentration or dispersion.Additionally,mathematical statistics and an adaptable fuzzy neural network are skillfully employed to meticulously analyze the complex relationship between climatic,combustible,and topographical environmental factors and the occurrence of fires.By using these advanced techniques,researchers can gain a deeper understanding of the underlying causes and contributing factors of wildfires,enabling more targeted prevention and response efforts.Research findings reveal that from 2001 to 2014,both the frequency of fires and the area affected by them demonstrated an upward trend.This indicates a growing concern for fire management and prevention.Fires occurred with notable frequency from January to May,suggesting a seasonal pattern that can be used to inform preventive measures during these high-risk months.In terms of the spatial distribution of grassland fires,it exhibits a distinct heterogeneity,with a concentration mainly in the southwest region of Sichuan Province.This spatial pattern may be influenced by a combination of factors such as vegetation type,climate,and human activities.Intriguingly,in the northeast of China,grassland fires have witnessed a remarkable increase in recent times.This finding highlights the need for a broader understanding of fire dynamics on a national scale.In the correlation analysis of various influencing factors,a high degree of correlation is observed between forest fires and fuel water content.This suggests that changes in fuel moisture levels can have a significant impact on the likelihood and severity of forest fires.Environmental variables are clearly identified as the primary driving factors behind the temporal and spatial characteristics of forest fires.For grassland fires,although there is a strong correlation with meteorological factors,it is reasonably speculated that human factors also exert a substantial influence on the characteristics of grassland fires.This could include activities such as land use changes,agricultural practices,and accidental ignitions.Based on the detailed analysis of the temporal and spatial characteristics of fires in Sichuan Province,this study provides a solid and reliable decision-making basis for formulating forest and grassland fire prevention and control policies,establishing early warning systems,and enhancing monitoring efforts in this region.By understanding the patterns and drivers of wildfires,policymakers and fire management agencies can develop more effective strategies to protect the precious ecological environment and safeguard the lives and property of the people.This will undoubtedly contribute to a more sustainable future for the region,ensuring that the beauty and biodiversity of Sichuan's forests and grasslands are preserved for generations to come.
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