Determinación del comportamiento del flujo base y su relación con variables de estado hidrológicas en la cuenca del río Diguillín, región del Bíobío, Chile
Date
2014
Journal Title
Journal ISSN
Volume Title
Publisher
Universidad de Concepción
Abstract
El estudio que se presenta a continuación, tiene como objetivo establecer el comportamiento de los sistemas de almacenamiento y liberación de agua subterránea y su relación con otras variables de estado hidrológicas, en la cuenca del rio Diguillín, ubicada en la región del Biobío, Chile. Se consideró un total de 2 estaciones fluviométricas y 8 estaciones pluviográficas, de las que se seleccionó un periodo de 10 años comprendido entre 1999 y 2008. En primer lugar, en base a caudales horarios del periodo completo, se identificaron los hidrogramas, los que fueron separados en su componente subterráneo y superficial. Paralelamente se estimó la precipitación areal mensual, a través de polígonos de Thiessen, para luego calcular valores mensuales de volumen de agua subterránea, coeficiente de escorrentía, caudal y precipitaciones. Posteriormente se analizó el comportamiento temporal de las variables de interés a saber, escorrentía directa, coeficiente de escorrentía, precipitación mensual areal, caudal medio mensual y volumen de reservas y su influencia en el volumen de agua subterránea mensual, para el periodo completo de información, así como para los periodos lluviosos y secos definidos en el presente estudio. Los resultados obtenidos muestran que el comportamiento del volumen de agua subterránea no se ve influenciado por las precipitaciones. Los caudales, principalmente los provenientes del periodo seco explican mejor el comportamiento del volumen de agua subterránea por los deshilos. Sin embargo, los volúmenes de agua subterránea o reservas, a lo largo del periodo presentan volumen altos, lo que presume el aporte de agua subterránea constantemente.
The study that appears next, aims to establish the behavior of the groundwater release and storage systems and its relation with other hydrological state variables, in the Diguillín river watershed, located in the Biobío region, Chile. A total of 2 fluviometrical stations and 8 pluviograph stations were considered, which a period of 10 years between 1999 and 2008 was selected. In the first place, on the basis of flows per hour of the complete period, hydrographs were identified which they were separated in their underground and superficial component. Simultaneously the monthly areal rainfall was considered, through Thiessens Polygons and soon calculate the ground water volume monthly values, the runoff coefficient, flows and rainfall. Subsequently for the complete period of information, as well as the defined rainy and dry periods in the present study, interest variables in temporary behavior and its influence in the ground water monthly volumewere analyzed. The obtained results show that the ground water volume behavior does not seem to be influenced by rainfall. The flows, mainly the ones originated in the dry period seem to explain better the ground water volume behavior by defrostings. Nevertheless, the ground water volume or reserves, throughout the period present high volumes, which presumes the constant ground water contribution.
The study that appears next, aims to establish the behavior of the groundwater release and storage systems and its relation with other hydrological state variables, in the Diguillín river watershed, located in the Biobío region, Chile. A total of 2 fluviometrical stations and 8 pluviograph stations were considered, which a period of 10 years between 1999 and 2008 was selected. In the first place, on the basis of flows per hour of the complete period, hydrographs were identified which they were separated in their underground and superficial component. Simultaneously the monthly areal rainfall was considered, through Thiessens Polygons and soon calculate the ground water volume monthly values, the runoff coefficient, flows and rainfall. Subsequently for the complete period of information, as well as the defined rainy and dry periods in the present study, interest variables in temporary behavior and its influence in the ground water monthly volumewere analyzed. The obtained results show that the ground water volume behavior does not seem to be influenced by rainfall. The flows, mainly the ones originated in the dry period seem to explain better the ground water volume behavior by defrostings. Nevertheless, the ground water volume or reserves, throughout the period present high volumes, which presumes the constant ground water contribution.
Description
Tesis presentada para optar al grado de Magíster en Ingeniería Agrícola con mención en Recursos Hídricos
Keywords
Aguas Subterráneas, Agua - Almacenamiento, Aguas Subterráneas - Flujo