摘要
基于2001—2020年MODIS-EVI数据,采用像元二分模型提取山东省植被覆盖度,并应用空间分析技术结合海拔、坡度等地形因子,对植被覆盖时空演变及地形分异特征进行分析。结果显示:(1)山东省植被覆盖相对较好,高、较高、中、较低、低覆盖类型面积比例分别为45.22%、31.91%、12.99%、4.25%、5.29%。整体上呈现出西高东低、南高北低的空间分布格局。(2)西部地区海拔低、坡度小,植被覆盖度高于其他地区,且高覆盖类型优势明显。鲁中南和胶东半岛低山丘陵区,随海拔升高、坡度增加,覆盖比例降低,较高覆盖比例升高,植被覆盖度有所减小。(3)2001—2020年间,山东省植被覆盖变化相对较为稳定,稳定型面积比例为46.49%;退化型、增加型面积占比分别为30.53%、22.01%。(4)在平原以及水域周边,海拔较低(<200 m)、地势相对平缓(<15°),植被存在一定程度退化、覆盖度出现降低趋势。在高海拔地区(>300 m)地势陡峭(>15°),植被覆盖度增加的区域面积比例(>30%)远远高于降低的面积比例(<10%),植被覆盖表现出增加趋势,且随海拔和坡度增加,呈增加趋势的面积比例逐渐增大,植被覆盖改善情况愈加明显。研究结果可为山东省不同地形条件下生态恢复工作提供决策支持。
Based on the MODIS-EVI data from 2001 to 2020,the vegetation coverage of Shandong Province was extracted by the pixel binary model,and spatial analysis technology was applied to analyze the spatio-temporal evolution of vegetation cover and topographic differentiation characteristics by combining topographic factors such as elevation and slope.The result showed that:(1)The vegetation coverage in Shandong Province was relatively good,and the proportions of extremely high,high,medium,low and extremely low vegetation coverage types were 45.22%,31.91%,12.99%,4.25%and 5.29%,respectively.On the whole,the spatial distribution pattern was high in the west and low in the east,and high in the south and low in the north.(2)The western region is lower in elevation and slope,and the vegetation coverage is higher than other regions,and the advantages of high coverage types are obvious.In the low hilly areas of central and southern Shandong and Jiaodong Peninsula,with the increase of elevation and slope,the vegetation coverage ratio decreased,the higher coverage ratio increased,and the vegetation coverage ratio decreased.(3)From 2001 to 2020,the change of vegetation cover in Shandong Province was relatively stable,and the proportion of stable area was 46.49%.The area proportion of degenerate type and increase type was 30.53%and 22.01%,respectively.(4)In the plains and surrounding waters,the elevation is low(<200 m),the terrain is relatively flat(<15°),and the vegetation had a certain degree of degradation and the coverage had a decreasing trend.In the high altitude area(>300 m)where the terrain is steep(>15°),the proportion of area increased by vegetation coverage(>30%)was much higher than that decreased(<10%).Vegetation cover showed an increasing trend,and with the increase of altitude and slope,the proportion of area increased gradually,and the improvement of vegetation cover was more obvious.The results can provide decision support for ecological restoration under different terrain conditions in Shandong Province.
作者
王如岩
李岩
董智
安淳淳
WANG Ruyan;LI Yan;DONG Zhi;AN Chunchun(Hydrology Center in Tai’an City,Tai’an Shandong 271000,P.R.China;Mountain Tai Forest Ecosystem National Positioning Observation and Research Station,College of Forestry,Shandong Agricultural University,Tai'an Shandong 271018,P.R.China)
出处
《西部林业科学》
CAS
北大核心
2024年第4期137-144,161,共9页
Journal of West China Forestry Science
基金
泰安市水文中心徂徕山水土保持综合观测站项目(380936)
国家自然科学基金(51879155)。
关键词
植被覆盖度
植被指数
时空演变
山东省
vegetation coverage
vegetation index
temporal and spatial variation
Shandong Province
