摘要
为了揭示伊犁河谷西部地区土地植被覆盖演化的驱动因素,选取2001-2016年16景卫星影像数据,基于"3S"技术,运用图像分类、叠加分析、统计分析等方法,分析了研究区土地植被覆盖时空演化规律,应用地理探测器模型定量探究了影响土地植被覆盖演化的主要驱动力。结果表明:(1)2001-2016年,裸地、草地、林地、耕地占总面积87%,占土地利用类型主导地位,构成区域土地利用基本格局,建设用地持续增加,冰川、沙地及水域面积持续减少;(2)研究区植被大面积稳定演进,低植被覆盖面积减少约1333 km^()2,高植被覆盖等级面积持续增加1020 km^(2),植被覆盖由中低等水平向较高和高植被覆盖等级转变;(3)利用地理探测器识别出研究区土地植被覆盖演化受自然和人类因素共同影响,降雨、气温、人口、GDP及高程为演化的主要因子,部分因子对土地植被变化的差异性显著,出现双因子协同增强现象;(4)气象要素是区域土地植被覆盖演化的主要驱动因素,人类活动为次要驱动因素。
Sixteen satellite-image data of the study area were selected from 2001 to 2016 as the data source to reveal the driving factors of land vegetation cover evolution in the western part of the Ili River Valley.Based on"3 S"technology,image classification,superposition analysis,statistical analysis,and other methods were used to analyze the spatiotemporal evolution of land vegetation cover in the study area.A geographical detector model was also used to explore the main driving force of land use and vegetation cover evolution quantitatively.The results showed that in the past 16 years,the total area of bare land,grassland,woodland,and cultivated land accounts for 87%of the total area,which constituted the basic regional land-use pattern.Construction land continued to increase,and the area of glacier,sandy land,and water continued to decrease.In the past 16 years,the vegetation in the study area steadily evolved.The area of low vegetation coverage decreased by approximately 1333 km^(2),and the area of high vegetation coverage increased by 1020 km^(2).Overall,the vegetation cover changed from low and medium level to high and high level.The evolution of land vegetation cover in the study area was affected by both natural and human factors.Rainfall,temperature,population,GDP,and elevation were the main factors of evolution.Besides,some factors had significant differences in land cover,and there is a two-factor synergistic enhancement phenomenon.Meteorological factors were the primary driving force of regional land vegetation cover evolution,and human activities were the secondary driving force.
作者
文广超
赵梅娟
谢洪波
张毅
张娟
WEN Guangchao;ZHAO Meijuan;XIE Hongbo;ZHANG Yi;ZHANG Juan(Henan PolytechnicUniversity,Jiaozuo 454000,Henan,China)
出处
《干旱区研究》
CSCD
北大核心
2021年第3期843-854,共12页
Arid Zone Research
基金
旱区地下水文与生态效应教育部重点实验室开放基金项目(2014G1502022)
河南省高等学校重点科研项目计划(15A170007)
河南理工大学博士基金项目(B2020-54)。
关键词
演化
驱动因子
土地利用类型
植被覆盖度
地理探测器
伊犁河谷西部
evolution
driving factor
land use type
vegetation cover
geographical detector
western Ili River Valley
