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地理科学  2008 

MODIS影像的NDVI和LSWI植被水分含量估算

, PP. 72-76

Keywords: MODIS,植被水分含量,等价水深,陆表水指数,植被干燥指数

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Abstract:

植被含水量估算在作物灌溉和森林火灾预警中具有重要指导意义。采用8天合成MODIS地表反射率数据,针对植被水分含量与陆表水指数,植被覆盖与归一化植被指数的关系及不同植被类型和地表水分含量状况在NDVI-LSWI二维空间中的分布规律,在NDVI-LSWI梯形特征空间中确定最大和最小含水量边界线的基础上采用植被干燥指数直接估算植被水分亏缺程度。该方法不仅简便,而且可以避开植被指数温度梯形图中陆地表面温度和气温差值的测量。

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