2000-2016年赤水河流域植被生态质量变化分析

为研究中国西部赤水河流域植被生态质量变化特征，本文基于MODIS归一化植被指数（NDVI）和气象监测资料，获取了中国西部赤水河流域2000-2016年植被覆盖度、净初级生产力（NPP）以及植被生态质量指数变化数据，并对17年期间植被生态质量时空变化进行分析。结果表明:（1）植被覆盖度均值从2000年的55.4%提高到了2016年的67.4%，覆盖度呈平均每10年增加6.8%的变化趋势;（2）植被NPP均值从2000年的864 gC/m2提高到了2016年的1024 gC/m2，NPP呈平均每10年增加63 gC/m2的变化趋势;（3）近年来植被生态质量显著提高，2016年植被生态质量为2000年以来最好，植被生态质量指数高达83.7。

Analysis of Eco - Environment quality variation of vegetation in Chishui River Basin during 2000-2016

The purpose of this paper is to study the variation of vegetation ecological quality of Chishui River Basin located in western China during 2000-2016. The vegetation coverage, net primary productivity (NPP) and vegetation ecological quality data were calculated based on MODIS Normalized Difference Vegetation Index (NDVI) and meteorological monitoring data. The temporal and spatial characteristics of vegetation ecological quality in Chishui River Basin during past 17 years were analyzed. The results show that: (1) The mean vegetation coverage increased from 55.4% in 2000 to 67.4% in 2016, with an average increase of 6.8% in every 10 years. (2) The mean NPP value of vegetation increased from 864 gC/m2 in 2000 to 1024 gC/m2 in 2016, with an average increase of 63 gC/m2 in every 10 years. (3) The vegetation ecological quality had been significantly improved in recent 17 years, the vegetation ecological quality in 2016 was the best, and the vegetation ecological quality index was up to 83.7.