基于MODIS植被指数的塔河流域植被时空变化特征研究

基于获取的塔河流域2000~2014年历年4~10月间逐月MODIS植被指数产品,采用时间序列谐波分析法(HANTS)对最大值合成的逐月NDVI时间序列数据进行了重建,用趋势线分析法对塔河流域近15年生长季(4~10月)MODIS NDVI的时间变化进行计算,用一元线性回归趋势法计算得到了塔河流域近15年生长季(4~10月)NDVI变化趋势的空间分布。结合植被类型分布图对计算得到的实验结果进行了研究分析,总结了塔河流域多年植被覆盖的时空分布及其变化规律,成果可为塔河流域综合治理及生态环境评价提供依据。

Study on Characteristics of Land Cover Change of Time and Space in Tarim River Basin Using MODIS NDVI

Based on every month MODIS NDVI from April to October of Tarim river basin from 2000 to 2014 year,using the method of time series harmonic analysis (HANTS) to rebuild NDVI time series data of the maximum synthetic from month to month,using the method of trend line analysis to calculate MODIS NDVI time change of growing season (from April to October) of the Tarim basin in nearly 15 years,using the method of unified linear regression analysis to calculate the spatial distribution of NDVI change trend of growing season (from April to October)of the Tarim river nearly 15 years.Have the aid of vegetation type distribution map,it researched and analysed the calculated experimental results,summarized space-time distribution and variation law of the vegetation cover of Tarim river basin for many years.The achievements would provide scientific basis for the ecological environment comprehensive treatment and assess of Tarim basin.