Special characterization of sandy beaches in western portion of Puerto Rico

dc.contributor.advisor Gilbes-Santaella, Fernando Chiqués, Gretchen M. College of Arts and Sciences - Sciences en_US
dc.contributor.committee Ramírez, Wilson
dc.contributor.committee Santos, Hernán
dc.contributor.department Department of Geology en_US
dc.contributor.representative Olivieri, Luis 2018-02-08T12:28:50Z 2018-02-08T12:28:50Z 2005
dc.description.abstract Remote sensing applications to beach system in Puerto Rico have been limited by low spatial resolution of the available images and lack of appropriate equipment for field validation. A GER-1500 spectroradiometer with a spectral range from 350 to 1050 nanometers was used to collect reflectance measurements in 15 sandy beaches in western Puerto Rico. Samples of the beaches were analyzed in the laboratory to determine the composition using sieving, XRD and grain counting to characterize the different components of the sand sediments. Results indicate a change in magnitude in the reflectance curve compared with the composition. Higher magnitude correlated with more carbonate material concentration in the sand and lower magnitude correlated with higher concentration of dark mineral. The reflectance shows a change in the slope of the reflectance curve between 450 to 550 nanometers that is present in all 15 beaches. The spectral slope in that range was calculated and related to the composition. The results of the field reflectance measurements were compared to high resolution (1m) IKONOS satellite images. Using band math these images showed a correlation with the field measurements. A methodology to obtain information about composition in sand beaches using remote sensing was developed using the slope of the reflectance curve. For the first time a spectral library of beach sand sediment for western Puerto Rico was created. en_US
dc.description.graduationYear 2005 en_US
dc.description.sponsorship Tropical Center for Earth and Space Studies and NASA grant en_US
dc.language.iso en en_US
dc.rights.holder (c) 2005 Gretchen M. Chiqués en_US
dc.rights.license All rights reserved en_US
dc.subject Sandy beaches en_US
dc.subject Western Puerto Rico en_US
dc.subject Carbonate material concentration en_US
dc.subject.lcsh Sediments (Geology) -- Puerto Rico -- Analysis. en_US
dc.subject.lcsh Sand -- Puerto Rico -- Analysis. en_US
dc.subject.lcsh Reflectance -- Measurement. en_US
dc.subject.lcsh Spectral reflectance. en_US
dc.subject.lcsh Spectrum analysis. en_US
dc.title Special characterization of sandy beaches in western portion of Puerto Rico en_US
dc.type Thesis en_US
dspace.entity.type Publication Geology en_US M.S. en_US
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