干旱区研究2026，Vol.43Issue(1)：96-107,12.DOI:10.13866/j.azr.2026.01.09
准东矿区土壤盐渍化时空演变特征及驱动因素
Spatio-temporal evolution characteristics and driving factors of soil salinization in the Zhundong Mining Area
摘要
Abstract
Open-pit coal mining in arid areas,while disturbing regional hydrological processes,soil physical and chemical environments and vegetation patterns,intensifies the risk of secondary salinization.However,its spatio-temporal evolution characteristics and driving mechanisms are still poorly understood.This paper takes the Zhun-dong mining area in Xinjiang,an extremely arid region,as the research object.By using Landsat remote sensing images from 2000 to 2024 and 220 measured soil salinity data,and combining methods such as BP neural net-work,support vector machine and random forest,multiple salinity inversion models are constructed.The sensi-tive spectral variables were screened through the variable projection Importance method(VIP)to improve the model accuracy,and the driving effects of climate and human activities on the degree of salinization were ex-plored.The results show that:(1)The VIP-RF model performs best in the complex surface background of ex-tremely arid mining areas.(2)Spatially,the central desert and the northern alluvial plain are mainly non-saline or slightly saline soil,the junction zone is mainly moderately saline,and the northwest and southeastern gravelly deserts and Gobi are concentrated areas of severe salinization.(3)In terms of time,mild salinization was domi-nant from 2000 to 2010.After the mining area was developed in 2010,the areas of moderate and severe saliniza-tion increased by approximately 79%and 84%respectively,while the area of non-saline soil decreased by 62.2%.(4)In terms of driving mechanisms,from 2000 to 2010,it was mainly controlled by natural factors such as cli-mate and topography,while from 2010 to 2024,human activities will gradually become dominant.Comprehen-sive analysis shows that the integration of spectral variable screening and random forest methods can effectively enhance the accuracy of salinization inversion in arid mining areas,and effectively reveal the evolution law of sa-linization under the interaction of natural and human factors.It has significant reference value for ecological envi-ronment monitoring and sustainable utilization of land resources in arid mining areas.关键词
露天开采/砾漠戈壁/盐分反演/随机森林/土壤盐渍化Key words
open-pit mining/gravel desert and Gobi/salt inversion/random forest/soil salinization引用本文复制引用
何洋洋,杜华栋,毕银丽,刘云龙..准东矿区土壤盐渍化时空演变特征及驱动因素[J].干旱区研究,2026,43(1):96-107,12.基金项目
陕西省自然科学基础研究计划资助项目(2025JC-YBMS-307) （2025JC-YBMS-307）
国家重点研发计划项目"西部干旱区煤能源基地区域生态保护与资源综合利用技术课题三"(2022YFF1303303) （2022YFF1303303）
