彌河下游地區(qū)植被變化特征及對(duì)地下水埋深的響應(yīng)

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中圖分類號(hào)：TV211.1+2 文獻(xiàn)標(biāo)志碼：A

Characteristics of Vegetation Changes and Response to Groundwater Depth in the Lower Reach Region of Mihe River

LIU Jie 1，2 ， LI Qingguo 1 ， YANG Wentai 1 ， LIU Fengming 1 ， CHEN Yang 1 ， LIU Yuyu 1 （1.School of Water Conservancy and Environment，University of Jinan，Jinan 25o022，Shandong，China; 2.Key Laboratoryof Coastal Zone Geological Environment Protection，Shandong Geology and Mining Bureau， Weifang ，Shandong，China）

Abstract：To explore the response of surface ecology to changes of groundwater level，the normalized diffrence vegetation index （NDVI）of thelowerreachof MeheRiverfrom 2O08to 2022 was used，andthe spatialand temporal characteristics of vegetation in the studyarea were analyzed bythetrend calculations，Mann-Kendallsignificance test，and Hurst index.Theclimaticand groundwaterbathymetrydatasets were combined，and theresponserelationship between vegetationand groundwater burial depth changes inthe lower reach of MiheRiver was studiedthrough thecorrelation and relative contribution data.Theresultsshowthat the NDVIof vegetation inthe lower reach of MiheRiver generally shows a fluctuating growth trend from 2008 to 2022，with a growth rate of 0.82% ，and the proportion of improved area reaches （2 86.35% .The burial depth of groundwater significantly affects the growth of 9O%of the regional vegetation in the study area.Inthecentralandsouthernregions，theabilityof groundwater burial depthrestoration todrivevegetation improvement isrelatively weak，butinthenorthernregion，thisabilityisstronger，andtherelativecontributionrateis slightlyhigherthanthatofclimate.Groundwaterburial depth declinehasastrongerabilitytodrive vegetation degradation in thecentraland southernregions，resulting ina more fragileecosysteminthese areasandariskof vegetation degradation，which is the main cause of vegetation degradation.

Keywords：vegetation；normalized diference vegetation index；climate；groundwater burialdepth；correlationanalysis; relative contribution

植被作為地表生態(tài)系統(tǒng)最重要的組成部分之一，在維持生態(tài)系統(tǒng)碳平衡、調(diào)節(jié)氣候和保護(hù)生物多樣性等方面發(fā)揮著重要作用[1]。（剩余8616字）