2001-2016年河南省NDVI时空变化特征分析  

Temporal and spatial variation analysis of NDVI in Henan from 2001 to 2016

作　　者：范松克 郝成元[1] FAN Song-ke;HAO Cheng-yuan(College of Surveying Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China)

机构地区：[1]河南理工大学测绘与国土信息工程学院

出　　处：《江苏农业学报》2019年第4期860-867,共8页Jiangsu Journal of Agricultural Sciences

基　　金：国家自然科学基金项目(41371105);河南省高校基本科研业务费专项(NSFRG1630)

摘　　要：基于2001-2016年MOD13Q1遥感数据集,并结合DEM数据,采用最大值合成法、一元线性回归趋势分析法,对河南省归一化植被指数(NDVI)时空变化规律及不同海拔梯度下NDVI变化特征进行了分析研究。结果表明:(1)河南省16年间NDVI值在0.5至0.7之间,且空间分布存在明显区域性差异。(2)NDVI总体呈增长趋势,NDVI增大区域面积占河南省总面积的86.65%,减少区域主要集中在河南省北部地区,人类活动影响可能是主因。(3)河南省NDVI变化具有明显的海拔梯度差异特征。随着海拔升高,NDVI显著增加和中度增加的面积比例逐渐下降,主要位于南阳盆地;而轻度增加的面积比例逐渐上升,主要位于豫西伏牛山地区,与NDVI呈增加趋势的空间分布格局一致。Based on remote sensing data set MOD13Q1 from 2001 to 2016 and DEM data, the temporal and spatial variations of the normalized difference vegetation index ( NDVI ) and variations of NDVI across different altitudinal gradients in Henan province were analyzed by using maximum synthesis and linear regression methods. Experimental results indicated that:(1) The regional NDVI value ranged from 0.5 to 0.7 in the past 16 years, and there was a significant regional difference in spatial distribution.(2) NDVI value showed an increasing trend, the region of NDVI increased accounted for 86.65% of the total area of Henan province, and the region of NDVI decreased mainly concentrated in the northern part of the function region, and the influence of human activities may be the main cause.(3) The change of NDVI had obvious difference characteristics of altitudinal gradient. With the increase of altitude, the proportion of NDVI increased dramatically and moderately was decreasing gradually, distributing in Nanyang Basin, and the proportion of NDVI increased slightly was increasing gradually, distributing in Funiu Mountain in the northern part of the function region, the spatial distribution pattern was consistent with that of NDVI increased.

关 键 词：NDVI 趋势分析 时空变化 海拔梯度 

分 类 号：X87[环境科学与工程—环境工程]