Long-term trends in water quality parameters in coastal waters of Puerto Rico

dc.contributor.advisor Armstrong, Roy A. Amirrezvani, Ali College of Arts and Sciences - Sciences en_US
dc.contributor.committee García-Saís, Jorge R.
dc.contributor.committee Gilbes-Santaella, Fernando
dc.contributor.committee Detrés, Yasmín
dc.contributor.committee Otero-Morales, Ernesto
dc.contributor.department Department of Marine Sciences en_US
dc.contributor.representative Ríos, Karen 2018-01-26T18:32:30Z 2018-01-26T18:32:30Z 2016
dc.description.abstract Ocean color remote sensing technology has been widely used in coastal water quality research. Of particular importance is the influence of river discharge on turbidity and chlorophyll concentration in coastal areas, which is seasonally and spatially variable. The coastlines and landscapes of Puerto Rico exhibit regional variability. In this study, Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) and Moderate Imaging Spectroradiometer (MODIS) Aqua satellite chlorophyll a concentration ([Chla]) and diffuse attenuation coefficient at 490nm (Kd490) data, at high spatial resolution, in combination with river streamflow discharge from the United Stated Geological Survey (USGS) were used to assess long-term trends impacting the diverse (i.e., Western, Northern, Eastern, and Southern) coastal waters along Puerto Rico for the years 1998 to 2013. The evaluation of Kd490, [Chla], river discharge time-series, and their correlation coefficients from 2km to 16km from the river mouth showed seasonal and spatial variation for the four regions of the island. Chlorophyll a concentration was the main contributor to turbidity in coastal waters of Puerto Rico during 1998 to 2013. Higher turbidity trends were primarily due to increased [Chla] (i.e., biogenic particles) compared to inorganic sediments, as shown by the high correlation between Kd490 and [Chla], especially during the dry season, compared to the rainy season. Kd490 and [Chla] were not related to river discharge. en_US
dc.description.graduationSemester Fall en_US
dc.description.graduationYear 2016 en_US
dc.language.iso en en_US
dc.rights.holder (c) 2016 Ali Amirrezvani en_US
dc.rights.license All rights reserved en_US
dc.subject Stream measurements-Puerto Rico en_US
dc.subject Effect of turbidity on rivers-Puerto Rico en_US
dc.subject Shelf topography-Puerto Rico en_US
dc.subject Chlorophyll concentration-analysis-Puerto Rico en_US
dc.subject.lcsh Water quality -- Puerto Rico -- Measurement. en_US
dc.subject.lcsh Ocean color -- Remote sensing. en_US
dc.subject.lcsh Chlorophyll. en_US
dc.subject.lcsh Turbidity. en_US
dc.subject.lcsh Suspended sediments. en_US
dc.title Long-term trends in water quality parameters in coastal waters of Puerto Rico en_US
dc.type Thesis en_US
dspace.entity.type Publication Marine Sciences en_US M.S. en_US
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