Long-term trends in water quality parameters in coastal waters of Puerto Rico
MetadataShow full item record
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.
Showing items related by title, author, creator and subject.
¿Cuáles son las industrias que crearán valor añadido en la zona sur de Puerto Rico como resultado de las operaciones del Puerto de las Américas? Vicéns-Feliberty, Miguel Á. (2008)With the evolution of the Ports around the world, new economies have been created based on competitive advantages and strategies around the concept of clusters and value added. The Port of Ponce, and the prospected Port ...
Voice onset time for voiced and voiceless stops across English proficiency levels for sixteen Puerto Rican Spanish speakers at the University of Puerto Rico at Mayagüez Maldonado-Valentin, Mirta (2007)This thesis examined Voice Onset Time (VOT) for voiced and voiceless stops across four English proficiency levels for sixteen Puerto Rican Spanish speakers at the University of Puerto Rico at Mayagüez. It used a Production ...
Teaching English the Puerto Rican way: Developing ESL materials that mirror the source culture for the Puerto Rican elementary English classroom Cardona, Stephanie M. (2007)In Puerto Rican English classrooms students are mainly exposed to English texts which are heavily laced with strong “American” referents and cultural values. This makes it difficult for language learners to apply their ...