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Measuring Forest Canopy Water Content

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Measuring Forest Canopy Water Content

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Water content is an important indication of vegetation health. Canopy water content vegetation indices provide a way to gauge canopy water content based on reflectance spectra measured by a field portable spectroradiometer such as the SR-6500, RS-5400, PSR+ and RS-3500. These instruments come equipped with DARWin SP Data Acquisition software and 19 built-in vegetation indices including WBI (Water Band Index) and NDWI (Normalized Difference Water Index). WBI is sensitive to increases in water content measured by the strength of an absorption at 970nm related to that of a feature at 900nm. As the feature at 970nm increases, so does water content in a canopy.

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