Assessment of karst rocky desertification from the local to regional scale based on unmanned aerial vehicle images

A case‐study of Shilin County, Yunnan Province, China

Bibliographic Data

ID21648712
AuthorsGuanghui Dai (0000-0003-2895-1572, Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments School of Ecology and Environment Science, Yunnan University Kunming PR China), Hu Sun (Laboratoire de Théorie du Droit), Bin Wang (0000-0002-8591-8528, Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments School of Ecology and Environment Science, Yunnan University Kunming PR China), Conghong Huang (0000-0002-0180-0806, Department of Epidemiology and Environmental Health School of Public Health and Health Professions, University at Buffalo Buffalo New York USA), Wenli Wang (0000-0001-5664-0056, Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments School of Ecology and Environment Science, Yunnan University Kunming PR China), Yang Yao (0000-0002-7240-2688, Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments School of Ecology and Environment Science, Yunnan University Kunming PR China), Ninglv Li (0000-0002-3984-6105, Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments School of Ecology and Environment Science, Yunnan University Kunming PR China), Xiaokun Ou (Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments School of Ecology and Environment Science, Yunnan University Kunming PR China), Zhiming Zhang (0000-0002-3370-9054, Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments School of Ecology and Environment Science, Yunnan University Kunming PR China, corresponding author)
Year2021
Volume32
Issue18
Pages5253-5266
Publication date2021-12-01
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.4106
OpenAlexW3201738124
LanguageEN
Citations received1
References cited47

Karst rocky desertification is a major ecologic and geologic problem in Southwest China that has restricted the sustainable development of society and the economy. Many methods have been used to evaluate rocky desertification based on satellite remote sensing, but the results of these methods are affected by the heterogeneous surroundings of the karst region and the low resolution of sensors. In this study, a new method that combines satellite images and unmanned aerial vehicle (UAV) images was used to quantitatively extract information and evaluate rocky desertification. First, we extracted the bare rock ratio from the local high‐resolution UAV images, and then the regression models were established between the bare rock ratio of UAV images and the band reflectivity and eight rock indices of satellite images to invert the bare rock ratio at the county scale. The results showed that the overall accuracy and F1 of the classification of UAV images was 97% and 90%, respectively. The linear regression model between the reflectivity of the pixels in band 2 of the LANDSAT image and the bare rock ratio extracted from the UAV images was the best (R 2 = 0.86). In addition, our method in which rocky desertification was assessed by the inversion model based on UAV images and LANDSAT images was superior to the traditional approach based on vegetation coverage. These results suggested that we can extract information on rocky desertification based on high‐resolution UAV images and assess rocky desertification by the inversion model from the local to regional scale

Cartography · Desertification · Geography · Geomorphology · Karst · Physical geography · Remote sensing · Satellite · Satellite imagery · Structural basin · Environmental Science · Remote Sensing and LiDAR Applications · Remote Sensing in Agriculture · Soil erosion and sediment transport · Geology

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Open DOI