1982-2013年陕西不同植被类型NDVI变化特征分析  

Characteristics of NDVI changes under the different vegetation types in Shaanxi Province from 1982 to 2013

作　　者：张君[1,2] 延军平[1] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062 [2]西安财经学院管理学院,西安710061

出　　处：《干旱区资源与环境》2017年第4期86-92,共7页Journal of Arid Land Resources and Environment

基　　金：国家社会科学基金重点项目(批准号:14AZD094)资助

摘　　要：基于1982-2013年陕西NDVI数据和陕西植被类型图,在GIS等技术的支持下,运用一元线性回归趋势分析和聚类分析的方法,对这32年间陕西总的植被覆盖状况时空变化特征及陕西13种类型的植被覆盖状况时空变化特征进行综合分析。研究结果表明:陕西1982-2013年植被覆盖状况总体呈现改善的趋势,且在陕北黄土高原区改善趋势强于陕南秦巴山地区;13种类型的植被覆盖状况也均呈改善趋势,一年一熟粮作和耐寒经济作物和温带丛生禾草草原的植被覆盖改善程度最高,且也集中分布于陕北黄土高原区;13种植被类型NDVI的年变化特征可聚类为5组,同一群组的植被类型NDVI具有相似的年变化规律,同时在空间分布上也表现出较强的地域性。这为认识陕西不同类型植被覆盖状况的时空变化规律提供科学依据。Based on the NDVI（ Normal Differential Vegetation Index） data of Shaanxi province from 1982 to2013 and the map of vegetation types,by using the two methods of one-dimensional linear regression analysis and cluster analysis,we studied the spatial and temporal characteristics of general vegetation coverage during 32 years and 13 types of vegetation coverage. The results showed： firstly,in Shaanxi province vegetation coverage conditions generally showed the tendency of improvement from 1982 to 2013,and the tendency of improvement in northern Shaanxi province was stronger than the one in southern Shaanxi province. Secondly,13 types of vegetation coverage had a good improvement tendency and the degree of improvement was the highest for annual crops,hardy crops and temperate grasslands. And they concentrated in the Loess Plateau region of northern Shaanxi province. The NDVI change features about 13 types were clustered into five groups; in the same group,NDVI of vegetation types had similar variation; the spatial distribution also showed a strong regional characters. The results provide a scientific basis for understanding the spatial and temporal variation of different types of vegetation in Shaanxi.

关 键 词：植被 NDVI 陕西 一元回归趋势分析 聚类分析 

分 类 号：Q948.15[生物学—植物学]