Publication:
Modeling the land-use legacy effect of agricultural practices on the water quality of streams from forest watersheds of Puerto Rico
Modeling the land-use legacy effect of agricultural practices on the water quality of streams from forest watersheds of Puerto Rico
dc.contributor.advisor | Pérez-Alegría, Luis R. | |
dc.contributor.author | Román-Valentín, Gabriel | |
dc.contributor.college | College of Engineering | en_US |
dc.contributor.committee | Hwang, Sangchul | |
dc.contributor.committee | Segarra, Rafael | |
dc.contributor.committee | Pagán Trinidad, Ismael | |
dc.contributor.department | Department of Civil Engineering | en_US |
dc.contributor.representative | Román Velazquez, Felix R. | |
dc.date.accessioned | 2019-04-15T12:04:46Z | |
dc.date.available | 2019-04-15T12:04:46Z | |
dc.date.issued | 2018-05 | |
dc.description.abstract | In order to aid in the establishment of “reference” criteria the nutrient status and dynamics of soils, water and stream sediments of a secondary forested watershed is being compared with the dynamics of an “historically” forested watershed in Puerto Rico. Additionally an empirical framework was developed for both watersheds using the Soil and Water Assessment Tool (SWAT) to account for the land use legacy effect on the present nutrient status of the waters. Results show that the hydrogeology of these watersheds is partially responsible for the discrepancies shown above. Calibrated model simulations show that agricultural succession tropical forests can have twice the annual phosphorous discharge of primary forests in the tropical island of Puerto Rico. Also a version of SWAT 2009 developed for the tropics by M. Strauch, M. Volk, (2013) resulted in a difference of up to 35.6% of annual dissolved phosphorous loads in simulation results. | en_US |
dc.description.abstract | Con el fin de ayudar en el establecimiento de criterios de "referencia" de nutrientes la dinámica de precipitación, suelos, sedimentos y descargas de una cuenca boscosa secundaria se va a comparar con la dinámica de una cuenca hidrográfica "históricamente" boscosa en Puerto Rico. Un marco empírico fue desarrollado para ambas cuencas utilizando el modelo de simulación hidrológica SWAT para cuantificar el efecto del legado de uso de terrenos sobre la situación actual de nutrientes de las aguas. Los resultados muestran que la hidrogeología de estas cuencas es parcialmente responsable de las discrepancias entre estas cuencas. Según las simulaciones de los modelos calibrados un bosque tropical de sucesión agrícola puede tener dos veces la descarga de fósforo anual de bosques primarios en la isla sub-tropical de Puerto Rico. Ademas, las simulaciones utilizando la version ajustada de SWAT para el tropico muestran diferencias de hasta 35.6% en descargas de fósforo anual disuelto. | en_US |
dc.description.graduationSemester | Spring | en_US |
dc.description.graduationYear | 2018 | en_US |
dc.identifier.uri | https://hdl.handle.net/20.500.11801/1912 | |
dc.language.iso | en | en_US |
dc.rights.holder | (c) 2018 Gabriel Román Valentín | en_US |
dc.rights.license | All rights reserved | en_US |
dc.subject | Watersheds - Hydrogeology - Puerto Rico | en_US |
dc.subject | Watersheds - Phosphorous - Forests - Puerto Rico | en_US |
dc.subject.lcsh | Water--Phosphorus content--Puerto Rico | en_US |
dc.subject.lcsh | Watershed hydrology--Puerto Rico | en_US |
dc.subject.lcsh | Forest succession | en_US |
dc.title | Modeling the land-use legacy effect of agricultural practices on the water quality of streams from forest watersheds of Puerto Rico | en_US |
dc.type | Thesis | en_US |
dspace.entity.type | Publication | |
thesis.degree.discipline | Civil Engineering | en_US |
thesis.degree.level | M.S. | en_US |