Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Assessing soil surface roughness decay during simulated rainfall by multifractal analysis
Year:2008
Research Areas
  • Chemistry,
  • Agriculture
Information
Abstract
Understanding and describing the spatial characteristics of soil surface microrelief are required for modelling overland flow and erosion. We employed the multifractal approach to characterize topographical point elevation data sets acquired by high resolution laser scanning for assessing the effect of simulated rainfall on microrelief decay. Three soil surfaces with different initial states or composition and rather smooth were prepared on microplots and subjected to successive events of simulated rainfall. Soil roughness was measured on a 2×2mm2 grid, initially, i.e. before rain, and after each simulated storm, yielding a total of thirteen data sets for three rainfall sequences. The vertical microrelief component as described by the statistical index random roughness (RR) exhibited minor changes under rainfall in two out of three study cases, which was due to the imposed wet initial state constraining aggregate breakdown. The effect of cumulative rainfall on microrelief decay was also assessed by multifractal analysis performed with the box-count algorithm. Generalized dimension, Dq , spectra allowed characterization of the spatial variation of soil surface microrelief measured at the microplot scale. These Dq spectra were also sensitive to temporal changes in soil surface microrelief, so that in all the three study rain sequences, the initial soil surface and the surfaces disturbed by successive storms displayed great differences in their degree of multifractality. Therefore, Multifractal parameters best discriminate between successive soil stages under a given rain sequence. Decline of RR and multifractal parameters showed little or no association.
International
Si
JCR
Si
Title
NONLINEAR PROCESSES IN GEOPHYSICS
ISBN
1023-5809
Impact factor JCR
1,314
Impact info
Volume
Journal number
15
From page
457
To page
468
Month
JUNIO
Ranking
Participants
  • Participante: J. Paz Ferreiro (Universidad de la Coruña)
  • Autor: Rosario García Moreno (UPM)
  • Autor: Antonio Saa Requejo (UPM)
  • Participante: E Vidal Vazquez1 (Universidad de la Coruña)
  • Autor: Ana Maria Tarquis Alfonso (UPM)
  • Autor: M. Cruz Diaz Alvarez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Valorización de Recursos
  • Departamento: Edafología
  • Departamento: Matemática Aplicada a la Ingeniería Agronómica
  • Centro o Instituto I+D+i: Centro de Estudios e Investigación para la Gestión de Riesgos Agrarios Medioambientales (CEIGRAM)
  • Grupo de Investigación: Grupo de Automatización en Señal y Comunicaciones (GASC)
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)