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La calidad del agua del lago de Izabal, Guatemala. Relaciones temporales y espaciales de variables físico-químicas y biológicas Translated title: Water quality Izabal Lake, Guatemala. Temporary and spatial relations of physical-chemical and biologicals variables

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      Abstract

      La preservación del lago de Izabal depende del control de la calidad del agua de sus afluentes, por lo que el monitoreo de variables físico-químicas y biológicas de forma continua permite identificar variaciones en los niveles de contaminación, esto permite evaluar la propuesta del mejor y mayor uso de los suelos en las respectivas subcuencas de la cuenca del lago de Izabal y Río Dulce a través de la Autoridad del Lago. Basados en los registros bimensuales de variables físico-químicas y biológicas de los afluentes del lago, de la serie de años de 2005 al 2011, se determinó que el estado del N-NO3- en el lago es considerado como deseable, de conformidad con los estándares de la Agenda de Conservación del Lago. La modelación logística no estableció efecto significante de época y posición sobre N-NH4+ y fósforo total, no obstante, sí lo estableció sobre oxígeno disuelto y transparencia, sin embargo, los modelos son de baja calidad utilizando como criterio el r². Las variables respuesta con correlación al 5% de significación fueron: Ni y Mn (0,731), sólidos en suspensión y Cr (0,7019), sólidos en suspensión y oxígeno disuelto (-0.80), sólidos en suspensión y % de saturación de oxígeno disuelto (-0,791). Igualmente se determinaron modelos estadísticos con 5% de significancia para la predicción de la conductividad, porcentaje de sales, transparencia y sólidos en suspensión.

      Translated abstract

      The preservation of Izabal Lake depends on the water quality control of its tributaries, since the monitoring of physicochemical and biological variables continuously allows identifying variations in pollution levels; this allows, at the same time, better criteria to evaluate the largest and better land use proposal in the respective sub-basins of the Izabal Lake and Rio Dulce through the Lake Authority. Based on bimonthly records of physicochemical and biological properties of the tributaries of the lake, during the years from 2005 to 2011, it was determined that the condition of N-NO3- in the lake is considered desirable, in accordance with standards of the Conservation Agenda Lake. Logistics modeling did not establish significant temporary and special effect on N-NH4+ and total phosphorus, however, it was established on dissolved oxygen and transparency although those are low quality models using the r² criterion. The response variables with correlation at 5% level were: Ni and Mn (0,731), suspended solids and Cr (0,7019), suspended solids and dissolved oxygen (-0,80), suspended solids and % saturation of dissolved oxygen (-0,791). Statistical models are determined using 5% significance for prediction of the conductivity, salinity, suspended solids and transparency.

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      Most cited references 18

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      Modelling and monitoring land-cover change processes in tropical regions

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        Application of chemometrics in river water classification.

        The main aim of this work is focused on water quality classification of the Brda river (Poland) and evaluation of pollution data obtained by the monitoring measurement during the period 1994-2002. The study presents the application of selected chemometric techniques to the pollution monitoring dataset, namely, cluster analysis, principal component analysis, discriminant analysis and factor analysis. The obtained results allowed to determine natural clusters and groups of monitoring locations with similar pollution character and identify important discriminant variables. Chemometric analysis confirmed the classification of water purity of the Brda river made by the Inspection of Environmental Protection but the results showed more differentiation between monitored locations. This enables better evaluation of the water quality in a monitored region. On the basis of the chemometric approach, it was also found that some locations were under the high influence of municipal contamination, and some others under the influence of agriculture (discharges from fields) within the observed time period.
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          Parámetros fisicoquímicos como indicadores de calidad y contaminación del agua, estado del arte

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            Author and article information

            Affiliations
            [1 ] Universidad de San Carlos (USAC) Guatemala
            [2 ] Universidad de San Carlos (USAC) Guatemala
            [3 ] Universidad de Ciego de Ávila (UNICA) Cuba
            Contributors
            Role: ND
            Role: ND
            Role: ND
            Journal
            rcta
            Revista Ciencias Técnicas Agropecuarias
            Rev Cie Téc Agr
            Universidad Agraria de La Habana (San José de las Lajas )
            2071-0054
            December 2014
            : 23
            : 4
            : 28-32
            S2071-00542014000400005

            http://creativecommons.org/licenses/by/4.0/

            Product
            Product Information: SciELO Cuba
            Categories
            AGRICULTURAL ENGINEERING

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