Núñez-Olivieri, Jonathan

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Test and validation of different methods for soil moisture estimation in Puerto Rico Soils
(2017-05) Núñez-Olivieri, Jonathan; Muñoz-Barreto, Jonathan; College of Engineering; Tirado Corbalá, Rebecca; Pagán Trinidad, Ismael; Department of Civil Engineering; Juan García, Eduardo J.
Resources available to retrieve accurate SM measurements are very limited in Puerto Rico. The objective of this project was to validate and downscale the AMSR2 SM products over Puerto Rico. For the validation, the 25km resolution SM from AMSR2 was compared with field measurements from each SCAN-NRCS stations in Puerto Rico. The validation revealed that 35% of the AMSR2 SM estimates behave similar to the SCAN-NRCS SM measurements with a correlation of 0.5363. To downscale the AMSR2 SM product, a simple linear equation was used to describe the relationship between the 25km SM and the three 1km resolution products from MODIS (Albedo, NDVI, and LST). The model provided a good fit with the AMSR2 SM with a correlation of 0.61 and an overall RMSE of 0.0050. Future work will include the optimization of the model and the addiction of other variables with hopes of improving the downscaled product.