摘要
【目的】本文以天山中部北麓为研究区,利用空间分辨率250 m、16 d合成的植被指数产品(MODIS13QI),计算2000-2017年期间研究区年度、春季、夏季和秋季的植被覆盖度。【方法】通过运用差值分析法研究近18年中国天山中部北麓植被覆盖时空变化特征,同时结合变化趋势定量评价模型对年度和季度植被覆盖面积进行评价。【结果】天山中部北麓植被覆盖特征空间上表现为由北部-中部-南部逐渐增加;植被生长空间变化强烈程度表现为由夏季-秋季-春季逐渐降低;年度植被覆盖度动态变化定量评价中,退化程度表现为:夏季>春季>秋季;年度退化区占全区面积的0.27%;-0.1~0.1的稳定区为:春季>秋季>夏季、年度稳定区面积占全区的84.46%;大于0.1改善区为:夏季>秋季>春季、年度的改善区面积占全区的15.27%。无显者的变化呈现为:春天>夏天>秋季、年度无显者植被面积为64.39%;明显增加趋势:夏季>秋季>春季、年度明显增加面积占全区的29.13%。【结论】通过定量评价植被覆盖时空变化情况,定义了R值及其对应的植被变化程度,季度植被覆盖面积减少强到弱呈现为:春季>秋季>夏季;探究研究区年度、季度的植被动态变化,为天山中部北麓的植被和生态环境保护提供一定的理论依据和数据支撑。
【Objective】In this paper,the vegetation coverage of the research area for the period 2000-2017 was calculated by using the vegetation index product(MODIS13 QI)with spatial resolution of 250 meters and 16 days synthesis.【Method】The spatial and temporal characteristics of vegetation cover in the northern foothills of the central part of Tianshan,China were studied by using differential analysis in the past 18 years,and the annual and quarterly vegetation cover area was evaluated using the quantitative evaluation model of change trend.【Result】The results showed that the spatial characteristics of vegetation coverage in the northern foot of the central Tianshan Mountains gradually increased from the north to the middle to the south;The intensity of spatial changes in vegetation growth was gradually reduced from summer to autumn to spring.In the quantitative evaluation of annual dynamic changes in vegetation coverage,the degree of degradation was:summer>spring>autumn;the annual degraded area accounted for 0.27%of the total area;The stable area of-0.1-0.1 was:spring>autumn>summer,annual stable area covered 84.46%of the whole area;The improvement areas greater than 0.1 were:summer>autumn>spring,and the annual improvement area accounts for 15.27%of the entire area.The change of the non-significant area was as follows:spring>summer>autumn,and the annual non-significant vegetation area was 64.39%;the apparent increase trend was:summer>autumn>spring,and the annual increase in area accounts for 29.13%.【Conclusion】Through quantitative evaluation of the temporal and spatial changes of vegetation cover,the R value and the corresponding degree of vegetation change are defined.The seasonal vegetation cover area decreases from strong to weak and appears as:spring>autumn>summer;The investigation of annual and quarterly vegetation dynamic changes in the study area provides a certain theoretical basis and data support for vegetation and ecological environmental protection in the northern foot of the central Tianshan mountains.
作者
古尼齐木·阿不迪热西提
阿里木江·卡斯木
买尔孜亚·吾买尔
高鹏文
Guniqimu Abudirexiti;Alimujiang Kasimu;Maierziya Wumaier;GAO Peng-wen(School of Geography and Tourism,Xinjiang Normal University,Xinjiang Urumqi 830054,China;Silk Road Economic Belt Urban Development Research Center,Xinjiang Normal University,Xinjiang Urumqi 830054,China;Key Laboratory of Lake Environment and Resources Autonomous Region,Xinjiang Arid Zone,Xinjiang Urumqi 830054,China)
出处
《西南农业学报》
CSCD
北大核心
2020年第4期875-883,共9页
Southwest China Journal of Agricultural Sciences
基金
“一带一路”新疆段城镇景观格局变化及生态安全评价(41661037)。
关键词
天山中部北麓
NDVI
时空变化
差值
变化趋势
MODIS
North foot of central Tianshan
NDVI
Spatiotemporal change
Difference
Trend of change
MODIS
作者简介
古尼齐木·阿不迪热西提(1994-),女,维吾尔族,新疆喀什人,在读硕士生,研究方向为遥感与环境资源研究,Email:1957550138@qq.com;通讯作者:阿里木江·卡斯木(1976-),男,维吾尔族,新疆克拉玛依人,博士,教授,研究方向为环境遥感监测与应用研究,E-mail:alimkasim@xjnu.cn。
