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Use of Normalized Difference Water Index for monitoring live fuel moistureAuthor(s): D.A. Roberts; P.E. Dennison; S.H. Peterson; J. Rechel
Source: International Journal of Remote Sensing. 26 (5): 1035-1042
Publication Series: Scientific Journal (JRNL)
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DescriptionNormalized Difference Vegetation Index (NDVI) and Normalized Difference Water Index (NDWI) were compared for monitoring live fuel moisture in a shrubland ecosystem. Both indices were calculated from 500m spatial resolution Moderate Resolution Imaging Spectroradiometer (MODIS) reflectance data covering a 33-month period from 2000 to 2002. Both NDVI and NDWI were positively correlated with live fuel moisture measured by the Los Angeles County Fire Department (LACFD). NDVI had R2 values ranging between 0.25 to 0.60, while NDWI had significantly higher R2 values, varying between 0.39 and 0.80. Water absorption measures, such as NDWI, may prove more appropriate for monitoring live fuel moisture than measures of chlorophyll absorption such as NDVI.
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CitationRoberts, D.A.; Dennison, P.E.; Peterson, S.H.; Rechel, J. 2006. Use of Normalized Difference Water Index for monitoring live fuel moisture. International Journal of Remote Sensing. 26 (5): 1035-1042.
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