Analyses on spatial and temporal characteristics of forest fires in Yunnan Province based on MODIS from 2001 to 2020

doi:10.12302/j.issn.1000-2006.202107001

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (5): 73-79.doi: 10.12302/j.issn.1000-2006.202107001

Special Issue: 林草计算机应用研究专题

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Analyses on spatial and temporal characteristics of forest fires in Yunnan Province based on MODIS from 2001 to 2020

ZHANG Wenwen¹(), WANG Jin¹, WANG Qiuhua¹^,^*(), ZHANG Xiyan², CAO Hengmao¹, LONG Tengteng¹

1. College of Civil Engineering, Southwest Forestry University, Yunnan Key Laboratory of Forest Disaster Warning and Control, Kunming 650224, China
2. Forestry Bureau in Xinping County, Yuxi 653400, China

Received:2021-07-01 Revised:2021-09-14 Online:2023-09-30 Published:2023-10-10

Abstract

Abstract:

【Objective】 Studying the temporal and spatial characteristics of forest fires in Yunnan Province, help quantify the occurrence of forest fires, identify areas of high incidence and finally carry out risk zoning scientifically. 【Method】Based on data from Yunnan Province between 2001 and 2020 (the MODIS fire location/thermal anomaly product, MCD14DL), we studied the correlation and heterogeneity of fire locations to analyze spatial and temporal distribution by statistical analysis, center point, standard deviational ellipse, Ripley’s K function, kernel density and other methods. 【Result】(1)We observed large annual fluctuations of forest fires between 2001 and 2020, peaking in 2010. Forest fires in Yunnan Province concentrated in winter and particularly spring, with fire spots peaking in March. (2)The occurrence of forest fires varied greatly between the regions, with the highest incidence in the southwest of Yunnan Province, followed by the southeast and northwest. The northeast had the smallest number of forest fires. The median centre was Pu’er, while the northwest of Pu’er had the highest kernel density(0.43) followed by the central and western regions of Xishuang banna Prefecture, with a kernel density of 0.34, and the northwest of Dali Prefecture and northeast of Wenshan Prefecture, with a nuclear density of 0.26; these four regions were hotspots for forest fires. (3)In the past 20 years, the spatial distribution of forest fires in Yunnan Province has displayed obvious directionality; the center of gravity has gradually shifted from Pu’er to Dali-Chuxiong-Yuxi-Honghezhou. (4)The spatial distribution of forest fires in Yunnan Province fits an aggregation model (but not to a high degree) and is gradually dispersed.【Conclusion】Forest fires in Yunnan Province between 2001 and 2020 were not randomly distributed, but followed a spatial-temporal distribution law. This law can be applied to inform a regional fire management, strengthen the construction and publicity for the fire prevention in priority regions, scientifically organize fire prevention work, reduce the incidence of forest fires and realize the sustainable development of forests.

Key words: moderate-resolution imaging spectroradiometer(MODIS) fire products, fire point, forest fire occurrence, spatial-temporal pattern, Yunnan Province

CLC Number:

S762

ZHANG Wenwen, WANG Jin, WANG Qiuhua, ZHANG Xiyan, CAO Hengmao, LONG Tengteng. Analyses on spatial and temporal characteristics of forest fires in Yunnan Province based on MODIS from 2001 to 2020[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2023, 47(5): 73-79.

Figures/Tables 5

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Analyses on spatial and temporal characteristics of forest fires in Yunnan Province based on MODIS from 2001 to 2020

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