归一化多波段干旱指数在农田干旱监测中的应用

被引：6

作者：

张红卫 ^{[1
,2
]}

陈怀亮 ^{[1
]}

周官辉 ^{[2
]}

赵百胜 ^{[2
]}

高正庆 ^{[2
]}

机构：

[1] 河南省气象科学研究所

[2] 新乡市气象局

来源：

科技导报 | 2009年 / 27卷 / 11期

关键词：

归一化多波段指数; 农田; 干旱监测;

D O I：

暂无

中图分类号：

S423 [旱灾];

学科分类号：

0904 ;

摘要：

土壤水分含量及植被生长状态是重要的干旱指数,对土壤及植被的正确光谱解译是判断土壤及植被干旱程度的重要依据之一。本研究利用MODIS传感器中通道2(860nm)波段被植被冠层强烈吸收性、通道6(1640nm)和通道7(2130nm)对土壤与植被水分含量吸收差异敏感性,构建了归一化多波段干旱指数(NMDI),验证了归一化多波段干旱指数在河南省应用的效果与可能性。研究发现,0～50cm深度的土壤墒情与NMDI显著相关,在对0～50cm层次的土壤墒情进行监测时,可以采用NMDI方法。分别对其进行F检验,均通过α=0.01显著性检验。同时,该指数在高植被覆盖区的应用效果有待进一步验证。

引用

页码：23 / 26

页数：4

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