Influence of the scale range width on the determination of the hydraulic conductivity and effective porosity. The case of a porous aquifer in southern Italy

  • Carmine Fallico Universidad Nacional de Chimborazo
  • Samuele De Bartolo Universitá della Calabria
  • María Fernanda Rivera-Velasquez Universidad Nacional de Chimborazo
  • Mario Ianchello Universitá della Calabria

Resumen

Abstract

The importance of a law that, for an assigned porous medium, gives the variability of the hydraulic conductivity with the effective porosity is well known. Commonly this variability is represented by a power law at different scales, especially those of laboratory and field. Often it can be useful to have a scaling law valid for a single scale range, comprising both those of laboratory and field. Therefore investigation about the reliability of the laws representing the scaling behavior in the various intervals to which reference was made could be suitable.

The purpose of this study is to provide evidence about the reliability of the scaling laws for laboratory, field and global (laboratory plus field) scaling ranges, verifying consistency with the expected proportionality between hydraulic conductivity and effective porosity for each of these. This verification was carried out using power-type scaling laws to two and four parameters respectively, and performing suitable moving averages of original data sets, in an attempt to reduce the inevitable measurement uncertainties. The experimental results, obtained with reference to the confined aquifer of Montalto Uffugo test field, show that there are no significant differences between the scaling laws considered and highlight the need to reduce the measurement uncertainties, which weigh heavily on the reliability of scaling laws.

 

Keywords: Scaling law; Hydraulic conductivity; Effective porosity; Laboratory measurement, Field measurement.

 

INFLUENCIA DE LA AMPLITUD DEL INTERVALO DE ESCALA EN LA DETERMINACIÓN DE LA CONDUCTIVIDAD HIDRÁULICA Y LA POROSIDAD EFECTIVA. EL CASO DE UN ACUÍFERO POROSA DEL SUR DE ITALIA

 

La importancia de una ley que, para un dado medio poroso, describa la variabilidad de la conductividad hidráulica en función de la porosidad efectiva es bien conocida. Frecuentemente esta variabilidad está representada por una ley de potencia a diferentes escalas, especialmente las de laboratorio y de campo. A menudo es útil tener una ley de escalamiento válida para un cierto rango de escala incluyendo los de laboratorio y campo. Por esta razón, es oportuno investigar la confiabilidad de las leyes que representan este comportamiento de escalamiento en los diferentes intervalos a los cuales típicamente se hace referencia. El propósito de este estudio es proporcionar evidencia sobre la confiabilidad de las leyes de escalamiento para intervalos de escala válidos para laboratorio, campo y globales (laboratorio + campo), verificando la consistencia con la proporcionalidad esperada entre la conductividad hidráulica y la porosidad efectiva para cada uno de estos. Esta verificación se llevó a cabo utilizando leyes de escalamiento de potencia para dos y cuatro parámetros respectivamente, y tratando de reducir las inevitables incertidumbres de medición. Los resultados experimentales obtenidos con referencia al acuífero confinado del campo de prueba Montalto Uffugo, muestran que no hay diferencias significativas entre las leyes de escalamiento consideradas y se destaca la necesidad de reducir las incertidumbres de medición, las cuales tienen un alto peso sobre la fiabilidad de las leyes de escala.

 

Palabras clave: ley de escalamiento; Conductividad hidráulica; porosidad efectiva; mediciones de laboratorio, medición de campo.

 

Biografía del autor/a

Carmine Fallico, Universidad Nacional de Chimborazo

The Engineer Carmine Fallico was born in Montalto Uffugo (Cosenza – Italy) in 1951. He graduated in Civil Engineering – Hydraulics Section to the University of Rome “La Sapienza”, in 1979 with 100/110. In 1980 he collaborated to research works about the Institute of Hydraulic Constructions of University of Rome. In 1985 he won a competition of Graduate Technical to the Chair of “Aqueducts, Urban Drainage and Sewer Systems” about the Department of Soil Conservation of University of Calabria. In 1999 he won a competition of Confirmed Researcher (Hydraulic Construction) about the Faculty of Engineering of the above mentioned University. In 2000 he stayed for one month, for research reasons, about the Institute for Land and Water Management (Katholieke Universiteit) of Leuven (Belgium), profiting by a programme of international exchange for short-term mobility of Italian Research National Council. Till the 2006 he carried out an experimental research activity with the Professor Jan Feyen, Director of ILWM of Katholieke Universiteit of Leuven (Belgium). In 2003 he won a competition of Associate Professor (Hydraulic) about the Faculty of Engineering of the University of Calabria, where he teaches Hydraulic, Mechanics of Fluids and Hydraulic of Porous Media. He is member of numerous boards of examiners and evaluations. He is member of the Academic Board of the PhD in Hydraulic Engineering for the Environment and Territory and of the PhD in Civil and Industrial Engineering at the University of Calabria. He is author of about 120 publications including articles on national and international journals, conference proceedings and monographs.

María Fernanda Rivera-Velasquez, Universidad Nacional de Chimborazo

Soy, Maria Fernanda Rivera, graduada en Ing. Ambiental en la Universidad Nacional de Chimborazo, con mérito a la mejor egresada, tengo un PhD Física Aplicada, cuya área de aplicación Hidráulica Subterránea. Además cuento con un Diplomado en Gestión y Administración Minera en el Instituto de Altos Estudios Nacionales y una Especialización en  ISO 9001:2000 Auditor/Lead Auditor Training realizado en la Escuela Superior Politécnica de Chimborazo. Mi actividad profesional en investigación ha sido principalmente enfocada en: Hidráulica Subterránea, Análisis de Riesgos Sanitarios Ambientales, Métodos de Remediación de Pasivos Ambientales. Además, he trabajado en Relaciones Internacionales en la Universidad de la Calabria Italia; en la Escuela Superior Politécnica de Chimborazo en la Comisión de Proyectos y Transferencia de Tecnología con el cargo de Docente Invitada donde óbstente el cargo de Director Encargado y en el Instituto de Investigaciones Geológico Metalúrgico Minero ocupando la segunda jefatura bajo el cargo de Coordinador General Técnico, donde por varias ocasiones tuve la subrogación de Director Ejecutivo Entre otras actividades adicionales puedo mencionar: Codirección de Tesis, Representante a las Instituciones donde trabaje en varios eventos internacionales, Revisor en revistas internacionales, Miembro del ICTP, etc.. 

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Publicado
2019-05-14
Sección
SECCIÓN C: INGENIERÍAS