• 研究报告 •

### 2000—2016年宁夏植被覆盖度的时空变化及其驱动力

1. (西北师范大学地理与环境科学学院， 兰州 730070)
• 出版日期:2019-08-10 发布日期:2019-08-10

### Spatiotemporal variation in vegetation coverage and its driving forces in Ningxia during 2000-2016.

HUANG Yue-yue, YANG Dong*, FENG Lei

1. (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China).
• Online:2019-08-10 Published:2019-08-10

Abstract: Based on MODIS NDVI remote sensing and contemporaneous weather data, we used trend analysis, coefficient of variation and Hurst index to investigate the dynamics of vegetation coverage in Ningxia from 2000 to 2016. The vegetation coverage showed an overall increasing trend over time, with a large difference between north and south. NDVI increased significantly from 2000 to 2005, relatively slowly increased from 2006 to 2011, and slightly decreased from 2012 to 2016. Precipitation and humidity index showed the greatest response to vegetation growth. In the growing season, NDVI showed an overall rising trend, with 79.88% of the study region showing significant increase in NDVI. Seasonal NDVI increased at a rate of 0.026·10 a-1,0.07·10 a-1 and 0.049·10 a-1 in spring, summer and autumn respectively, during 2000-2016. Although the vegetation coverage in 62.13% of the vegetationcovered area continued to increase, some regions exhibited decreasing vegetation coverage. The continued improved area in vegetation coverage in southern forest area was larger than that in northern irrigation area around the Yellow River.