Water content estimation from hyperspectral images and MODIS indexes in Southeastern Arizona

被引：77

作者：

Cheng, Yen-Ben ^{[1
]}

Ustin, Susan L. ^{[1
]}

Riano, David ^{[1
,2
]}

Vanderbilt, Vem C. ^{[3
]}

机构：

[1] Univ Calif Davis, CSTARS, Dept Land Air & Water Resources, Davis, CA 95616 USA

[2] Univ Alcala de Henares, Dept Geog, E-28801 Madrid, Spain

[3] NASA, Ames Res Ctr, Moffett Field, CA USA

来源：

REMOTE SENSING OF ENVIRONMENT | 2008年 / 112卷 / 02期

基金：

美国国家航空航天局;

关键词：

AVIRIS; MODIS; water content; equivalent water thickness; vegetation index;

D O I：

10.1016/j.rse.2007.01.023

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Hyperspectral water retrievals from AVIRIS data, equivalent water thickness (EWT), were compared to in situ leaf water content and LAI measurements at a semiarid site in southeastern Arizona. Retrievals of EWT showed good correlation with field canopy water content measurements. Statistical analysis suggested that EWT was significantly different among seven community types, from savanna to agriculture. Four band-ratio indexes (NDVI, EVI, NDWI, and NDII) were derived from MODIS showing strong spatial agreement between maps of AVIRIS EWT and MODIS indexes, and good statistical agreement for the range of habitats at the site. Temporal patterns of these four indexes in all vegetation communities except creosote bush and agriculture showed distinct seasonal patterns that responded to the timing and amount of precipitation. Moreover, these time series captured different ecological responses among the different vegetation communities. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：363 / 374

页数：12

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