Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Complexity of Soils Porous Structure: A Simple Question
Year:2011
Research Areas
  • Physics chemical and mathematical,
  • Engineering
Information
Abstract
In the last decades scientist have realized that soil processes are implicated the biggest global challenges facing humanity such as soil aeration, sequestration or emission of greenhouse gasses, volatilization of volatile organic chemicals among other phenomena. Progress in these challenges will depend on being able to understand the integrated behavior of soil as a system, and dealing with the complexity in describing soil in these terms. In this work we focus in one of the critical soil issues: soil structure and pore connectivity. A quantitative and explicit characterization of soil structure is difficult because of the complexity of the pore space. We proposed a model to attempt to capture the complexity of the system in which we interpret porous soils as heterogeneous networks, where pores are represented by nodes and the links representing flows between them. Pore properties such as position and size are described by fixed states in a metric space, while an affinity function is introduced to bias the attachment probabilities of links according to these properties taking in account soil texture. These types of models are named as Heterogeneous Preferential Attachment (HPA). We perform an analytical study of the degree distributions in the soil model and show that under reasonable conditions all the model variants yield a multiscaling behavior in the connectivity degrees, leaving an empirically testable signature of heterogeneity in the topology of pore networks. With the aim to study in more detail topological properties of these networks, for different real soils samples an analysis of the community structure have been applied and studied depending on the values of the parameters of the porous soil model used. The detection of communities of pores, as groups densely connected with only sparser connections between groups, could contribute to understand the mechanisms of the diffusion phenomena in soils.
International
Si
Congress
AGU Fall Meeting 2011
960
Place
San Francisco, USA
Reviewers
Si
ISBN/ISSN
0096-3941
Start Date
05/12/2011
End Date
09/12/2011
From page
1501
To page
1501
AGU Fall Meeting Abstracts Vol. A
Participants
  • Autor: Rosa Maria Benito Zafrilla (UPM)
  • Autor: Juan Pablo Cárdenas Villalobos (UPM)
  • Autor: Antonio Santiago Andrés (UPM)
  • Autor: F Borondo, (UAM)
  • Autor: Ana Maria Tarquis Alfonso (UPM)
  • Autor: Juan Carlos Losada Gonzalez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Automatización en Señal y Comunicaciones (GASC)
  • Centro o Instituto I+D+i: Centro de Estudios e Investigación para la Gestión de Riesgos Agrarios Medioambientales (CEIGRAM)
  • Departamento: Física y Mecánica Fundamentales y Aplicada a la Ingeniería Agroforestal
  • Departamento: Matemática Aplicada a la Ingeniería Agronómica
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)