桂西喀斯特区植被覆盖度变化趋势及其地形效应  

Vegetation coverage change trends and their topographic effects in the karst region of western Guangxi

作　　者：李明志[1] 莫建飞 蒋健[1] 黄秋芹 陈燕丽 LI mingzhi;MO Jianfei;JIANG Jian;HUANG Qiuqin;CHEN Yanli(Baise Meteorological Bureau,Guangxi Baise 533000,China;Guangxi Institute of Meteorological Sciences,Nanning 530022,China)

机构地区：[1]百色市气象局,广西百色533000 [2]广西壮族自治区气象科学研究所,南宁530022

出　　处：《气象研究与应用》2024年第3期99-105,共7页Journal of Meteorological Research and Application

基　　金：广西科技重点研发计划项目(桂科AB23026052、桂科AB21238010);广西气象科研计划项目(桂气科2023Z03)。

摘　　要：利用2000—2020年MODIS卫星遥感资料和数字高程模型(DEM),运用趋势分析和地形效应的方法,以桂西喀斯特区百色市为研究区,探讨桂西喀斯特地区植被变化的高程、坡度和坡向等因素的空间差异性。结果表明:(1)桂西喀斯特区百色市植被覆盖度总体状况良好。以中度植被覆盖度(59.19%)和中高度植被覆盖度(37.71%)为主,两者面积变化明显,前者区域面积减少33.2%,后者区域面积增加29.8%。中低度植被覆盖度仅为2.10%。(2)地形因子对桂西喀斯特区植被生态的影响明显。在地势低、坡度小的平坦区域和地势高、坡度大的陡峭区域,植被覆盖度以减少为主导,在地势较高,坡度2°~15°的区域,植被覆盖度变化以增加为主导。地形从阴坡过渡到阳坡,植被覆盖度的恢复趋势有所提升,但在幅度上表现得相对较为平缓。Based on MODIS satellite remote sensing data and the Digital Elevation Model(DEM)from 2000 to 2020,this study investigates the spatial variations of vegetation change in terms of elevation,slope,and aspect in the Baise region of the karst region of the western Guangxi using trend analysis and topographic effect methods.The results show that:(1)the overall condition of Baise's vegetation coverage is in good condition.It is dominated by medium vegetation cover(59.19%)and medium-high vegetation coverage(37.71%),both of which have obvious changes in area,with the area of the former decreasing by 33.2%and the area of the latter increasing by 29.8%.The area of medium-low vegetation cover is only 2.10%.(2)There is obvious influence of topographic factors on the vegetation ecology of karst areas in western Guangxi.In flat areas with low elevation and moderate slopes,as well as steep areas with high elevation and steep slopes,the change of vegetation cover tends to decrease.In contrast,there is a noticeable increase in vegetation covering in regions with moderate elevation and slopes of 2°~15°.In the terrain transitioning from shady slopes to sunny slopes,the recovering tendency of the vegetation cover is increased,but it shows a relatively more moderate in magnitude.

关 键 词：植被覆盖度 变化特征 地形因子 

分 类 号：P49[天文地球—大气科学及气象学]