基于NDVI的陕北黄土高原丘陵沟壑区植被覆盖变化及其驱动力分析——以志丹县为例  

Analysis of Vegetation Change and Its Driving Force Based on NDVI in the Hill and Ravine Region of the Loess Plateau in the Northern Shaanxi——A Case Study of Zhidan County

作　　者：张雅丽[1] 王建军[1] 

机构地区：[1]西北农林科技大学资源经济与环境管理研究中心,杨凌712100

出　　处：《林业经济》2016年第12期21-25,40,共6页Forestry Economics

基　　金：林业公益性行业科研专项项目"退耕还林工程效益监测;评估与优化技术"(编号:201504424)

摘　　要：根据2000～2010年的志丹县逐月MODIS／NDVI数据，以乡镇为单元，结合志丹县社会经济统计资料，采用多元线性回归方法，分析了志丹县植被覆盖变化及其驱动力。结果表明：从气候尺度上，气温对植被覆盖影响显著且与其呈负相关关系；从区域尺度上，志丹县各乡镇11年问平均归一化植被指数（NDVI）值均有所增加，其中张渠乡增加幅度最大，永宁镇增加幅度最小；从经济尺度上，农村经济总收入、农业科技水平以及政策对植被覆盖的影响显著且与之呈正相关关系。因此，提高各乡镇的农村经济总收入和农业科技水平，加强退耕还林（草）等生态建设工程的实施，能加快植被覆盖的增加，进一步促进生态环境的改善。Using the monthly MODIS NDVI data from 2000 to 2010 and combiningthem with the social and eco- nomic statistics of Zhidan County, the driving force of the vegetation change in Zhidan County were analyzed by adopting Multiple Linear Regression with the township as a unit. The result showed an obvious effect of the tem- perature on the vegetation as well as a negative correlation between them; from the regional scale, the averaged NDVI had increased during 11 years in each township of Zhidan county, with the maximum amount of increase in the township of Zhangqu and the minimum amount of increase in the township of Yongning. From the economic scale, the total income of rural economy, the agricultural science and technology level and policy had significant ef- fects on the vegetation and there is a positive correlation between them. Therefore, the improvement of the total income of rural economy and the agricultural science and technology level, and the strengthening of the implemen- tation of the ecological program such asthe Sloping Land Conversion Program can accelerate vegetation growth and further promote the improvement of ecological environment.

关 键 词：植被变化 NDVI 退耕还林 驱动力 

分 类 号：Q948[生物学—植物学]