Publication Date:
2021-05-19
Description:
Este trabajo fue parte de la Red del Monitoreo Ambiental, del Plan Operativo Institucional 2002 del IMARPE. Se evaluó la calidad del ambiente marino y la contaminación de origen terrestre. En la bahía El Ferrol las aguas servidas son vertidas por cuatro cámaras de bombeo en la zona norte, y al sur desemboca el río Lacramarca. La bahía Coishco recibe aguas de escorrentía agrícola y doméstica que,
con las del río Santa, forman aguas de mezcla con salinidad propia. La temperatura correspondió a la zona y estación del año. El oxígeno disuelto fue bajo en julio, con anoxia frente a las plantas pesqueras en Ferrol e hipoxia en Coishco. Los altos niveles de silicatos y fosfatos en Coishco recibieron influencia del río Santa. Los sólidos suspendidos totales (SST) y los sulfuros de hidrógeno, se mantuvieron dentro de los límites permisibles de la Ley General de Aguas. Los aceites y grasas alcanzaron niveles altos, al sureste de El Ferrol. Los coliformes termotolerantes fueron elevados en la zona central de Coishco; y en El Ferrol en julio, sobrepasaron la LGA para las clases IV, V y VI. Las trazas de Cd, Pb y Zn, alcanzaron la concentración promedio más baja de los dos últimos años. Los hidrocarburos en sedimentos fueron bajos. La calidad de agua del río Santa, en la cuenca inferior, mostró importantes aportes de silicatos y nitratos, y contaminación por coliformes termotolerantes principalmente en abril, y la DBO5 se mantuvo dentro de los niveles permisibles.
Description:
This work was into the Network of Environmental Monitoring, Institutional Operational Plan 2002 IMARPE. In the first period (April 26-30) 16 sea sample points, and in the second one (July 24-27), 19 points were fixed; in both cases, 12 beach sample stations, one in Lacramarca river and other in Santa river, were set. Indicators of the marine environment and of the pollution from land were evaluated. In El Ferrol Bay the sewage are discharged through four pumping chambers in the north, and in the south, the Lacramarca river flows into the sea. The Coishco bay receives agricultural and domestic runoff, forming water mixes with the Santa river, with a typical salinity. The temperature corresponded to the área and season studied. Dissolved oxygen levels were low in July, with anoxia off fish factories in El Ferrol Bay, and hypoxia in some áreas into Coishco bay. Silicates and phosphates were high, mainly due to the influence of Santa river to Coishco. The total suspended solids (TSS) were within the permissible limits of the Peruvian General Waters Law. The Hydrogen sulfide concentrations were low. Oils and fats reached significant levels in some points of El Ferrol Bay southeast. In Coishco bay, the values of thermotolerant coliforms were high mainly in the central área; in El Ferrol bay, in July, those values exceeded the LGA for IV,
V and VI classes. The Cd, Pb and Zn, trace metals had the lowest average concentration in the last two years. Hydrocarbon concentrations in sediments were generally low. The water quality of Santa river, at the end of the lower basin showed high concentrations of silicate and nitrate inputs; besides mainly thermo tolerant coliform contamination, mainly in April, and BO5D within the permissible levels.
Description:
Published
Keywords:
Seawater
;
Water quality
;
Pollution
;
Peruvian Sea
Repository Name:
AquaDocs
Type:
Journal Contribution
,
Not Known
Format:
pp.7-26
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