摘要
为了探讨地表生态对于地下水位变化的响应,基于2008—2022年弥河下游地区归一化植被指数(NDVI),采用趋势计算、Mann-Kendall显著性检验及Hurst指数等方法,分析研究区植被时空变化特征,结合气候和地下水埋深数据集,通过相关性及相对贡献率数据,研究弥河下游地区植被与地下水埋深变化的响应关系。结果表明,2008—2022年间,弥河下游地区植被NDVI总体呈现波动增长的趋势,增长率为0.82%,改善面积占比达到86.35%;地下水埋深显著影响弥河下游90%的区域植被的生长;在中部、南部地区,地下水埋深恢复驱动植被改善的能力较弱,但在北部地区该能力较强,相对贡献率略高于气候的;地下水埋深下降在中部、南部地区驱动植被退化的能力较强,导致这些地区生态系统较为脆弱,植被存在退化风险,是导致植被退化的主要原因。
To explore the response of surface ecology to changes of groundwater level,the normalized difference vegetation index(NDVI)of the lower reach of Mehe River from 2008 to 2022 was used,and the spatial and temporal characteristics of vegetation in the study area were analyzed by the trend calculations,Mann-Kendall significance test,and Hurst index.The climatic and groundwater bathymetry datasets were combined,and the response relationship between vegetation and groundwater burial depth changes in the lower reach of Mihe River was studied through the correlation and relative contribution data.The results show that the NDVI of vegetation in the lower reach of Mihe River generally shows a fluctuating growth trend from 2008 to 2022,with a growth rate of 0.82%,and the proportion of improved area reaches 86.35%.The burial depth of groundwater significantly affects the growth of 90%of the regional vegetation in the study area.In the central and southern regions,the ability of groundwater burial depth restoration to drive vegetation improvement is relatively weak,but in the northern region,this ability is stronger,and the relative contribution rate is slightly higher than that of climate.Groundwater burial depth decline has a stronger ability to drive vegetation degradation in the central and southern regions,resulting in a more fragile ecosystem in these areas and a risk of vegetation degradation,which is the main cause of vegetation degradation.
作者
刘杰
李庆国
杨文泰
刘丰铭
陈洋
刘玉玉
LIU Jie;LI Qingguo;YANG Wentai;LIU Fengming;CHEN Yang;LIU Yuyu(School of Water Conservancy and Environment,University of Jinan,Jinan 250022,Shandong,China;Key Laboratory of Coastal Zone Geological Environment Protection,Shandong Geology and Mining Bureau,Weifang 261021,Shandong,China)
出处
《济南大学学报(自然科学版)》
北大核心
2025年第4期492-500,共9页
Journal of University of Jinan(Science and Technology)
基金
国家自然科学基金项目(51909105)
山东省地矿局海岸带地质环境保护重点实验室开放基金项目(SYS202106)。
关键词
植被
归一化植被指数
气候
地下水埋深
相关性分析
相对贡献率
vegetation
normalized difference vegetation index
climate
groundwater burial depth
correlation analysis
relative contribution
