基于遥感的重庆市永川区植被覆盖度时空演变分析

Temporal and Spatial Change Analysis of Vegetation Coverage in Yongchuan District of Chongqing City Based on RS

以2003年、2010年和2017年的Landsat TM/OLI遥感影像为数据源,利用ENVI 5.2采用归一化植被指数和像元二分模型提取了永川区的植被覆盖度,并在ArcGIS 10.2中进行数据处理与统计,揭示了永川区的植被覆盖度的时间与空间的演变特征。结果表明,2003年、2010年和2017年永川区的总体植被覆盖度较好,分别为0.5791、0.5925和0.6201,以高植被覆盖度和较高植被覆盖度为主,研究期内的植被覆盖情况不断改善。本研究为永川区的生态建设、农业发展提供了一定的数据支持。

Using Landsat TM/OLI remote sensing images in 2003,2010 and 2017 as data sources,using ENVI 5.2,vegetation coverage in Yongchuan District was extracted by using normalized vegetation index and pixel dichotomy model.The data processing and statistics were conducted with ArcGIS 10.2.The temporal and spatial evolution characteristics of vegetation coverage in Yongchuan District were revealed.The results showed that the total vegetation coverage in Yongchuan District was relative good in 2003,2010 and 2017,with values of 0.5791,0.5925 and 0.6201.Higher vegetation coverage and sub-high vegetation coverage were the main factors.During the research period,the vegetation coverage was continuously improved.This research provided some data support for the ecological construction and agricultural development of Yongchuan District.