唐山市植被覆盖度时空演变及地形因子的响应  

Spatio-temporal Evolution of Vegetation Coverage and Response of Topographic Factors in Tangshan City

作　　者：曹琳 吴风华 CAO Lin;WU Feng-hua(College of Mining Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210

出　　处：《华北理工大学学报（自然科学版）》2025年第1期88-95,共8页Journal of North China University of Science and Technology：Natural Science Edition

基　　金：河北省自然科学基金青年基金项目(D2019209322):基于星-机-地多源遥感信息的滨海湿地互花米草入侵监测及光合色素反演。

摘　　要：植被覆盖度在生态环境质量评价、地表过程监测和生态保护决策等方面发挥着重要作用。研究基于GEE平台,采用像元二分法获取唐山市不同时段的植被覆盖度。通过Sen趋势分析和MK检验探讨植被覆盖度的时空演变情况。利用GIS叠加分析研究植被覆盖度与地形因子的关系。结果表明:(1)唐山市植被覆盖度稳定,城市建设区域和南部沿海地区较低,中部和北部低山区较高,中等级及以上占比超过65%。(2)在2001~2021年间,唐山市的植被覆盖度轻微改善,改善面积达到了39.041%。(3)植被覆盖度与高程和坡度显著相关,特别在高程200米以上和坡度15°~32°范围内,中高等级和高等级植被覆盖度较高。探究植被覆盖度演变对该地区的生态环境改善具有重要意义。Fractional vegetation cover plays an important role in ecological environment quality assessment,surface process monitoring and ecological protection decision-making.Based on the GEE platform,the vegetation coverage of Tangshan City in different periods was obtained by using the pixel dichotomy method.Sen trend analysis and MK test were used to explore the spatial and temporal evolution of vegetation coverage.The relationship between vegetation coverage and topographic factors was studied by GIS overlay analysis.The results show that:(1)The vegetation coverage of Tangshan City is stable.The vegetation coverage in the urban construction area and the southern coastal area is low.The vegetation coverage in the central and northern low mountainous areas is high,and the proportion of medium grade and above is more than 65%.(2)From 2001 to 2021,the vegetation coverage of Tangshan City was slightly improved,and the improved area reached 39.041%.(3)Vegetation coverage is significantly correlated with elevation and slope,especially in the range of elevation above 200 meters and slope 15°~32°,the vegetation coverage of middle and high grade and high grade is higher.Exploring the evolution of vegetation coverage provides strong support for the improvement of the ecological environment in the region.

关 键 词：植被覆盖度 时空演化 地形因子 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]