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dc.contributor.advisorGilbes-Santaella, Fernando
dc.contributor.authorChiqués, Gretchen M.
dc.description.abstractRemote 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.sponsorshipTropical Center for Earth and Space Studies and NASA granten_US
dc.subjectSandy beachesen_US
dc.subjectWestern Puerto Ricoen_US
dc.subjectCarbonate material concentrationen_US
dc.subject.lcshSediments (Geology) -- Puerto Rico -- Analysis.en_US
dc.subject.lcshSand -- Puerto Rico -- Analysis.en_US
dc.subject.lcshReflectance -- Measurement.en_US
dc.subject.lcshSpectral reflectance.en_US
dc.subject.lcshSpectrum analysis.en_US
dc.titleSpecial characterization of sandy beaches in western portion of Puerto Ricoen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2005 Gretchen M. Chiquésen_US
dc.contributor.committeeRamírez, Wilson
dc.contributor.committeeSantos, Hernán
dc.contributor.representativeOlivieri, Luis
dc.contributor.collegeCollege of Arts and Sciences - Sciencesen_US
dc.contributor.departmentDepartment of Geologyen_US

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