Representation of spacetime variability of soil moisture Academic Article uri icon


  • A simplified spatial-temporal soil moisture model driven by stochastic spatial rainfall forcing is proposed. The model is mathematically tractable, and allows the spatial and temporal structure of soil moisture fields, induced by the spatial-temporal variability of rainfall and the spatial variability of vegetation, to be explored analytically. The influence of the main model parameters, reflecting the spatial scale of rain cells, the soil storage capacity, the rainfall interception and the soil water loss rate (representing evaporation and deep infiltration) is investigated. The variabilities of the spatially averaged soil moisture process, and that averaged in both space and time, are derived. The present analysis focuses on spatially uniform vegetation conditions; a follow-up paper will incorporate stochastically heterogeneous vegetation.

published proceedings

  • Proceedings of the Royal Society A

author list (cited authors)

  • Isham, V., Cox, D. R., Rodrguez-Iturbe, I., Porporato, A., & Manfreda, S.

citation count

  • 51

complete list of authors

  • Isham, V||Cox, DR||Rodrguez-Iturbe, I||Porporato, A||Manfreda, S

publication date

  • December 2005