Muestreo intensivo de parámetros físico-químicos en dos sitios de la cuenca inferior del río Salado (provincia de Buenos Aires): estudio comparativo

Dredging works in several sectors of Salado River are probably the most important activity of disturbance in a pampean aquatic ecosystem, with implications in a RAMSAR site (Samborombón Bay). The interventions are taking place in the lower basin and considered as a reference of disturbance for futur...

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Detalles Bibliográficos
Autores principales: Quaíni, Karina Paola, Gabellone, Néstor Adrián, Ardohain, Diego Martín, Solari, Lía Cristina
Formato: Articulo
Lenguaje:Español
Publicado: 2006
Materias:
Ciencias Naturales
Buenos Aires (Argentina)
Ríos
intensive sampling, physical and chemical parameters, suspended solids, hydraulic works, lower basin of Salado River
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/69518
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-69518
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Naturales
Buenos Aires (Argentina)
Ríos
intensive sampling, physical and chemical parameters, suspended solids, hydraulic works, lower basin of Salado River
spellingShingle Ciencias Naturales
Buenos Aires (Argentina)
Ríos
intensive sampling, physical and chemical parameters, suspended solids, hydraulic works, lower basin of Salado River
Quaíni, Karina Paola
Gabellone, Néstor Adrián
Ardohain, Diego Martín
Solari, Lía Cristina
Muestreo intensivo de parámetros físico-químicos en dos sitios de la cuenca inferior del río Salado (provincia de Buenos Aires): estudio comparativo
topic_facet Ciencias Naturales
Buenos Aires (Argentina)
Ríos
intensive sampling, physical and chemical parameters, suspended solids, hydraulic works, lower basin of Salado River
description Dredging works in several sectors of Salado River are probably the most important activity of disturbance in a pampean aquatic ecosystem, with implications in a RAMSAR site (Samborombón Bay). The interventions are taking place in the lower basin and considered as a reference of disturbance for future and major works as the dredging of almost 100 km of the Salado River main channel. Physical and chemical conditions were analysed in two sectors: upstream (El Destino, ED) and downstream (Guerrero, G) of La Postrera. This study was done before and during the extraction of a river restriction and the old bridge replacement. Samples were collected during 18 weeks (3/04-7/04) (2 or 3 times/week). Each sample was the result of the water sample integration on a transversal transect of the stream. The physical and chemical parameters measured «in situ» were: pH, conductivity, turbidity, dissolved oxygen, temperature and salinity. Fractions of phosphorus and suspended solids were analysed. The simulation of different sampling frequencies showed that variables related to physic environment (temperature, conductivity and pH) can be explained by monthly and biweekly sampling. On the other hand, the main variations of total phosphorus, suspended solids and turbidity can be only explained by the daily sampling. Suspended solids concentration was higher upstream (mean: 0.12 g.L -1 ) than downstream (mean: 0.10 g.L -1 ). Maximum mean phosphorus concentration values were reached at ED. Soluble reactive phosphorus concentrations were similar at both river sectors (305.81 and 307.08 μg.L -1 in ED and G, respectively). Conductivity diminished from 6,770to 2,530 μS.cm -1 due to the discharge increase. Total particulate phosphorus, suspended solids and turbidity increased at ED and diminished at G. The dredging works in moments of low waters, and taking care of the extracting material location, as recommended the environmental management techniques, did not affect sediment transport through the river. The phosphorus concentration differences between both river sectors could be by the settlement processes in La Tigra Lake and the availability of this nutrient to the phytoplankton and macrophytes.
format Articulo
Articulo
author Quaíni, Karina Paola
Gabellone, Néstor Adrián
Ardohain, Diego Martín
Solari, Lía Cristina
author_facet Quaíni, Karina Paola
Gabellone, Néstor Adrián
Ardohain, Diego Martín
Solari, Lía Cristina
author_sort Quaíni, Karina Paola
title Muestreo intensivo de parámetros físico-químicos en dos sitios de la cuenca inferior del río Salado (provincia de Buenos Aires): estudio comparativo
title_short Muestreo intensivo de parámetros físico-químicos en dos sitios de la cuenca inferior del río Salado (provincia de Buenos Aires): estudio comparativo
title_full Muestreo intensivo de parámetros físico-químicos en dos sitios de la cuenca inferior del río Salado (provincia de Buenos Aires): estudio comparativo
title_fullStr Muestreo intensivo de parámetros físico-químicos en dos sitios de la cuenca inferior del río Salado (provincia de Buenos Aires): estudio comparativo
title_full_unstemmed Muestreo intensivo de parámetros físico-químicos en dos sitios de la cuenca inferior del río Salado (provincia de Buenos Aires): estudio comparativo
title_sort muestreo intensivo de parámetros físico-químicos en dos sitios de la cuenca inferior del río salado (provincia de buenos aires): estudio comparativo
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/69518
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