A drone-and field-based investigation of the land degradation and soil erosion at an opencast coal mine dump after 5 years'evolution of natural processes
Wu Xiao1
He Ren2
Tao Sui2
Heyu Zhang3
Yanling Zhao2
Zhenqi Hu2
1.Department of Land Management,Zhejiang University,Hangzhou 310058,China;Institute of Land Reclamation and Ecological Restoration,China University of Mining and Technology(Beijing),100083 Beijing,China2.Institute of Land Reclamation and Ecological Restoration,China University of Mining and Technology(Beijing),100083 Beijing,China3.Guangzhou South China Institute of Natural Resources Science and Technology,Guangzhou 510642,China
摘要：Opencast coal mining has a large impact on the land surface,both at the mining pits themselves and at waste sites.After artificial management is stopped,a reclaimed opencast coal mine dump is affected by wind and water erosion from natural processes,resulting in land degradation and even safety incidents.In this paper,the soil erosion and land degradation after 5 years of such natural processes,at the Xilinhot opencast coal mine dump in Inner Mongolia,were investigated.A multi-source data acquisition method was applied:the vegetation fraction coverage(VFC)was extracted from GF-1 satellite imagery,high-precision terrain characteristics and the location and degree of soil erosion were obtained using a drone,and the physical properties of the topsoil were obtained by field sampling.On this basis,the degree and spatial distribution of erosion cracks were identified,and the causes of soil erosion and land degradation were analyzed using the geographical detector.The results show that(1)multi-source data acquisition method can provide effective basic data for the quantitative evaluation of the ecological environment at dumps,and(2)slope aspect and VFC are the main factors affecting the degree of degradation and soil erosion.Based on above analysis,several countermeasures are proposed to mitigate land degrada-tion:(1)The windward slope be designed to imitate the natural landform.(2)Reasonable engineering measures should be applied at the slope to restrain soil erosion.(3)The Pioneer plants should be widely planted on the platform at the early stage of reclamation.
机标关键词：degradationevolutionnaturalerosionaftersoildumpland
论文发表日期：2022-06-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：17( 50-66 )
英文信息