Name: Modeled Water Availability

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Description: The amount of suitable habitat for poplar increases dramtically if irrigation is available. The ability to irrigate depends on landowners having water rights. Water rights information is not available for the majority of the AHB-NW five state region. The presence of photosynthetically active vegetation in otherwise dry agricultural areas during the summer suggests that the area is irrigated and therefore that the landowner has water rights. A data product called the Global Land Survey (GLS) can be used to determine the presence of photosynthetically active vegetation by calculating a Normalized Difference Vegetation Index, or NDVI, value. Comparing NDVI values to National Agriculture Imagery Program, NAIP, imagery enabled the developement of a model to predict water availability.

Copyright Text: University of Washington School of Environmental and Forest Sciences, ESRI, USGS, NASA

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