AlimuYIMING,MuhtarAMAT,ZHU Min.Spatio-temporal Variations of Vegetation Cover and Influencing Factors in Kashi Region From Recent 20 years[J].Northern Horticulture,2023,(04):60-70.[doi:10.11937/bfyy.20221803]
近二十年喀什地区植被覆盖的时空变化与影响因素分析
- Title:
- Spatio-temporal Variations of Vegetation Cover and Influencing Factors in Kashi Region From Recent 20 years
- Keywords:
- normalized difference vegetation index; temporal and spatial variation; spatial aggregation distribution; spatial autocorrelation analysis
- 文献标志码:
- A
- 摘要:
- 以2000—2019年喀什地区NDVI时序数据集为试材，采用统计分析法、斜率回归趋势线法、地统计分析等方法，研究了近20年来喀什地区植被覆盖的时空变化及其影响因素，以期为喀什地区生态环境和社会经济可持续发展提供服务。结果表明：1)喀什地区2000—2019年的NDVI均值在时序上呈微小的上升趋势，均值为0.177，20年的增长率为0.66%，变异系数为8.90%，并在2003年发生突变。2)近20年的NDVI在空间上呈区域性和时段性上升与退化并存特征，显著的聚集分布，并且植被覆盖整体空间上呈增加趋势。3)相关性分析表明，自然和人文社会因素的影响在空间上具有区域性差异的特征，NDVI高值集中分布于地形平坦和水资源丰富的绿洲地区。不同土地利用类型的NDVI均值大小呈耕地＞城乡用地＞林地＞草地＞未利用土地＞水域的特征。水系、交通线和居民点附近NDVI均值较高，各城市化因素与NDVI均值呈显著正相关。4)近20年喀什地区NDVI在时空上呈微弱的增长趋势，且自然和人文社会因素共同引起喀什地区植被覆盖的时空变化。
- Abstract:
- The Normalized Difference Vegetation Index(NDVI) time-series data set of Kashi region from 2000 to 2019 was used as the test material,and it aimed to study the spatial and temporal changes of vegetation cover over the recent 20 years as well as its influencing factors in Kashi region with the help of statistical analysis,slope regression trend line method and geostatistical analysis,in order to provide services for the ecological environment and sustainable socio-economic development of Kashi region.The results showed that,1) the average value of NDVI in Kashi region from 2000 to 2019 tended to be slightly upward in time series,with an average value of 0.177,a 20-year growth of 0.66% and a coefficient of variation of 8.90%.Abrupt changes occurred in 2003.2) The NDVI in the recent 20 years featured the coexistence of regional and temporal rise and degradation in space,with significant aggregation and distribution,and vegetation cover was increasing standing at an overall space perspective.3) The correlation analysis indicated that the impacts of natural,human and social factors were characterized by regional differences in space and high NDVI values concentrated in the oasis areas with flat terrain conditions and rich water resources.The average value of NDVI for different land utilization types was sequenced as follows cultivated land>urban and rural land>forest land>grassland>unused land>water area.The average value of NDVI near the water system,traffic line,and residential area was high and the urbanization factors were significantly correlated with the average value of NDVI.4) The NDVI value in Kashi region showed a weak growth trend in time and space during the recent 20 years,and natural and human social factors jointly caused the temporal and spatial changes in vegetation cover of Kashi region.
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备注/Memo
第一作者简介：阿力木?依明（1993-），男，硕士，研究方向为区域生态环境保护与地理教学。E-mail:alemjane@163.com.责任作者：木合塔尔?艾买提（1982-），男，硕士，副教授，硕士生导师，现主要从事区域生态资源环境评价等研究工作。E-mail:muhtar99@sina.com.基金项目：喀什大学校级科研资助项目（（17）2605）；国家自然科学基金资助项目（U1703341）。收稿日期：2022-05-01