MODIS短波红外水分胁迫指数及其在农业干旱监测中的适用性分析

被引：15

作者：

董婷

孟令奎

张文

机构：

[1] 武汉大学遥感信息工程学院

来源：

遥感学报 | 2015年 / 19卷 / 02期

关键词：

MODIS短波红外水分胁迫指数(MSIWSI); 干旱监测; 土壤水分; 植被覆盖度; 土地利用类型;

D O I：

暂无

中图分类号：

S423 [旱灾]; TP79 [遥感技术的应用];

学科分类号：

摘要：

植被土壤水分状态的微小变化能引起短波红外光谱反射率的巨大变化。利用MODIS第6波段和第7波段构建短波红外光谱特征空间,依据不同土地利用类型分析不同地物在光谱特征空间中的分布规律,提出MODIS短波红外水分胁迫指数MSIWSI。利用实测20 cm土壤相对湿度验证MSIWSI、EVI以及MPDI与实测数据相关性关系并对比分析不同指数敏感性,利用不同物候期春小麦土壤墒情分析MSIWSI指数适用性。研究结果表明:与其他指数相比,MSIWSI模型与实测土壤湿度的相关性更高;MSIWSI能够反映不同物候期春小麦土壤水分变化趋势,相关性都达到极显著性水平。

引用

页码：319 / 327

页数：9

共 20 条

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