Author:
Zhang Yali,Tian Yichao,Li Ying,Wang Donghua,Tao Jin,Yang Yongwei,Lin Junliang,Zhang Qiang,Wu Luhua
Abstract
AbstractKarst rocky desertification (KRD) has become one of the most serious ecological and environmental problems in karst areas. At present, mapping KRD with a high accuracy and on a large scale is still a difficult problem in the control of KRD. In this study, a random forest (RF) based on maximum information coefficient and correlation coefficient feature selection is proposed to predict KRD. Nine predictors stood out as feature factors to estimate KRD. Rock exposure was the most important predictor, followed by fractional vegetation cover for the prediction of KRD processes. The kappa and classification accuracy indexes were to evaluate the performance of the model. We recorded overall accuracy rate and kappa index values of 94.7% and 0.92 for the testing datasets respectively. The RF model was then used to predict the KRD in 2001, 2011, 2016, and 2020, and it was found that the KRD in the study area has exhibited a positive trend of improvement. Therefore, the use of multisource remote sensing data combined with the RF model can obtain better prediction results of KRD, thereby providing a new idea for large-scale estimation of the KRD in peak-cluster depression.
Funder
The Program of Improving the Basic Research Ability of Young and Middle-aged Teachers in Guangxi Universities
National Natural Science Foundation of China
Natural Science Foundation of Guangxi Zhuang Autonomous Region
Guangxi Key Research and Development Program
Science and Technology Department of Guangxi Zhuang Autonomous
High level talent introduction project of Beibu Gulf University
Publisher
Springer Science and Business Media LLC
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