WEI Hong,LI Xiaolei,XU Liping,et al.Spatial and Temporal Distribution of NDVI and Its Response to Climate Factors in the Manasi River Basin[J].Research of Soil and Water Conservation,2019,26(01):215-220.
玛纳斯河流域NDVI时空变化及对气象因子的响应
- Title:
- Spatial and Temporal Distribution of NDVI and Its Response to Climate Factors in the Manasi River Basin
- 关键词:
- MODIS-NDVI; 气象因子; 响应; 玛河流域
- Keywords:
- MODIS-NDVI; meteorological factors; response; Manasi River Basin
- 分类号:
- TP79
- 摘要:
- 基于MODIS-NDVI数据和同期的气象资料，运用趋势分析、R/S分析、偏相关分析等方法，在区域和像元两个尺度上研究玛纳斯河流域的植被空间变化特征。结合趋势分析结果和Hurst指数，研究玛纳斯河流域NDVI变化的可持续性特征，并从气温和降水量2个因素分析了NDVI对气象因子的响应。结果表明：（1）2000-2015年玛纳斯河流域NDVI变化呈微弱增长趋势，增长速率为0.044/10 a。（2）玛纳斯河流域植被覆盖状况改善的区域占总面积的42.03%，没有发生显著变化的区域占总面积的55.88%，显著退化的区域仅占总面积的2.09%，研究区整体生态环境有所改善。（3）从Hurst指数来看，研究区大部分地区NDVI变化具有可持续性，但局部地区具有反持续性。持续性改善区域占总面积的52.81%，持续退化的面积比重为29.54%，15.87%面积的区域未来变化趋势无法确定。（4）相关性分析结果显示：NDVI与年降水量呈正相关，与平均温度呈负相关，降水对NDVI的影响高于平均温度。
- Abstract:
- Based on the MODIS-NDVI data and the corresponding meteorological data, trend analysis, R/S analysis, partial correlation analysis were carried out to study the characteristics of the spatial variation of vegetation in the Manasi River Basin from the two scales of region and pixel. The trend analysis result and Hurst index were combined to study the sustainability characteristics of NDVI pattern in Manasi River Basin. The response of NDVI to meteorological factors was analyzed from two aspects of temperature and precipitation. The results indicate that:(1) during 2000-2015, the NDVI in Manasi River Basin showed the weak growth trend, with a growth rate of 0.044/decade; (2) the areas of vegetation improvement in the Manasi River Basin accounted for 42.03% of the total area, 55.88% of the total area without significant change, the significant degradation area accounted for only 2.09% of the total area, the overall ecological environment in the study area had been improved; (3) according to the Hurst index, NDVI changes were sustainable in most regions of the study area, but were anti-sustainability in some regions; the area of sustainable improvement accounted for 52.81% of the total area, the area of continuous degradation was 29.54%, and the area where the future trend of change could not be determined accounted for 15.87%; (4) the results of correlation analysis showed that NDVI was positively correlated with precipitation and negatively correlated with average temperature, suggesting that the effect of precipitation on NDVI was higher than average temperature.
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备注/Memo
收稿日期:2018-3-9;改回日期:2018-4-17。
基金项目:自治区研究生科研创新项目（XJGRI2017044）；国家自然科学基金（31760151）
作者简介:位宏(1992-),男,河南周口人,硕士研究生,研究方向:景观生态学。E-mail:hnwh12012@163.com
通讯作者:徐丽萍(1978-),女,新疆库尔勒人,副教授,研究方向:土地覆被变化与景观生态。E-mail:xlpalw@sina.com