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Vegetation Water Content Mapping in a Diverse Agricultural Landscape: National Airborne Field Experiment 2006Mapping land cover and vegetation characteristics on a regional scale is critical to soil moisture retrieval using microwave remote sensing. In aircraft-based experiments such as the National Airborne Field Experiment 2006 (NAFE 06), it is challenging to provide accurate high resolution vegetation information, especially on a daily basis. A technique proposed in previous studies was adapted here to the heterogenous conditions encountered in NAFE 06, which included a hydrologically complex landscape consisting of both irrigated and dryland agriculture. Using field vegetation sampling and ground-based reflectance measurements, the knowledge base for relating the Normalized Difference Water Index (NDWI) and the vegetation water content was extended to a greater diversity of agricultural crops, which included dryland and irrigated wheat, alfalfa, and canola. Critical to the generation of vegetation water content maps, the land cover for this region was determined from satellite visible/infrared imagery and ground surveys with an accuracy of 95.5% and a kappa coefficient of 0.95. The vegetation water content was estimated with a root mean square error of 0.33 kg/sq m. The results of this investigation contribute to a more robust database of global vegetation water content observations and demonstrate that the approach can be applied with high accuracy. Keywords: Vegetation, field experimentation, thematic mapper, NDWI, agriculture.
Document ID
20110011909
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Cosh, Michael H. (Agricultural Research Service Hydrology and Remote Sensing Lab. Beltsville, MD, United States)
Jing Tao (Beijing Normal Univ. China)
Jackson, Thomas J. (Agricultural Research Service Hydrology and Remote Sensing Lab. Beltsville, MD, United States)
McKee, Lynn (Agricultural Research Service Hydrology and Remote Sensing Lab. Beltsville, MD, United States)
O'Neill, Peggy (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 25, 2013
Publication Date
May 9, 2011
Publication Information
Publication: Journal of Applied Remote Sensing
Volume: 4
Subject Category
Earth Resources and Remote Sensing
Report/Patent Number
GSFC.JA.4319.2011
Distribution Limits
Public
Copyright
Other