Remote sensing technology for rapid extraction of burned areas and ecosystem environmental assessment

PeerJ

article

Shiqi Zhang¹  Maoyang Bai¹  Xiao Wang²  Xuefeng Peng³  Ailin Chen⁴  Peihao Peng¹ 

[1] College of Earth Sciences, Chengdu University of Technology;School of Architecture and Civil Engineering, Chengdu University;College of Tourism and Urban-Rural Planning, Chengdu University of Technology;Sichuan Earthquake Agency;Chengdu lnstitute of Tibetan Plateau Earthquake Research, China Earthquake Administration

关键词: Forest fire;    Burned areas;    Sentinel-2;    Remote sensing environment index;    GEE platform;    OTSU threshold;   

DOI  :  10.7717/peerj.14557

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Forest fires are one of the significant disturbances in forest ecosystems. It is essential to extract burned areas rapidly and accurately to formulate forest restoration strategies and plan restoration plans. In this work, we constructed decision trees and used a combination of differential normalized burn ratio (dNBR) index and OTSU threshold method to extract the heavily and mildly burned areas. The applicability of this method was evaluated with three fires in Muli County, Sichuan, China, and we concluded that the extraction accuracy of this method could reach 97.69% and 96.37% for small area forest fires, while the extraction accuracy was lower for large area fires, only 89.32%. In addition, the remote sensing environment index (RSEI) was used to evaluate the ecological environment changes. It analyzed the change of the RSEI level through the transition matrix, and all three fires showed that the changes in RSEI were stronger for heavily burned areas than for mildly burned areas, after the forest fire the ecological environment (RSEI) was reduced from good to moderate. These results realized the quantitative evaluation and dynamic evaluation of the ecological environment condition, providing an essential basis for the restoration, decision making and management of the affected forests.

【 授权许可】

CC BY