Determinación de la concentración de sólidos suspendidos totales (SST) y metales pesados en la cuenca del Río Morote, Nicoya, Guanacaste
Fecha
2009
Autores
Sánchez Murillo, Ricardo
León, Sandra
Saravia, Ana Yuri
De Mena Sánchez, Carlos
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Universidad Nacional (Costa Rica)
Resumen
Se determinó la concentración de solidos suspendidos totales y metales pesados en la cuenca del río Morote. El estudio abarco seis campañas de muestreo entre abril del 2003 y mayo del 2005. Los puntos de muestreos seleccionados corresponden a lugares desde la cuenca alta hasta la desembocadura del río Morote en el Golfo de Nicoya. La concentración de sólidos suspendidos totales (SST) en la desembocadura durante la época lluviosa en promedio superó los 200 mg/L. En los sedimentos del lecho del río se encontró enriquecimiento de metales como Cu, Ni, Cd y Fe, no asi en Pb. En cuanto al Zn, en la época seca la concentración estuvo cerca del valor límite (200 mg/kg) establecido por la Agencia de Protección Ambiental de los Estados Unidos (EPA, por sus siglas en inglés).
The Total Suspended Solids (TTS) and heavy metal concentrations of Morote River Basin were determined. The project includedsix sampling campaigns between April 2003 and May 2005. The sampling points in the Morote River were selected from the high basin to the mouth of the river in the Gulf of Nicoya. During the rainy season the concentrations of TTS exceed the value of 200 mg/L in the mouth of the river. An enrichment of the sediments was found from the river-bed with heavy metals such as copper, cadmium, nickel and iron but enrichment with lead was not found. In the dry season the concentration of zinc was colose to the allotted maximum value (200 mg/kg) which has been established for the Envoronmental Protection Agency of the United States (EPA).
The Total Suspended Solids (TTS) and heavy metal concentrations of Morote River Basin were determined. The project includedsix sampling campaigns between April 2003 and May 2005. The sampling points in the Morote River were selected from the high basin to the mouth of the river in the Gulf of Nicoya. During the rainy season the concentrations of TTS exceed the value of 200 mg/L in the mouth of the river. An enrichment of the sediments was found from the river-bed with heavy metals such as copper, cadmium, nickel and iron but enrichment with lead was not found. In the dry season the concentration of zinc was colose to the allotted maximum value (200 mg/kg) which has been established for the Envoronmental Protection Agency of the United States (EPA).
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CUENCA HIDROGRÁFICA, GOLFO DE NICOYA, EROSIÓN, SEDIMENTACIÓN, SÓLIDOS SUSPENDIDOS TOTALES, METALES PESADOS, MATERIA ORGÁNICA, HYDROGRAPHIC BASIN, ORGANIC MATTER, SEDIMENTATION