Evaluation of surface soil moisture distribution by means of SAR remote sensing techniques and conceptual hydrological modelling

Andrea Giacomelli, Ugo Bacchiega, Peter A Troch, Marco Mancini

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

This paper discusses the attempts to derive surface soil moisture information for two catchments under different climates in Europe based on active microwave remote sensing techniques and conceptual hydrological modelling. The two catchments were selected as test sites during the MAC-EUROPE'91 campaign. The first catchment, Slapton Wood, is situated in south-west England. The second catchment, Virginiolo, is situated in Tuscany, Italy. For both sites, multitemporal full polarimetric AIRSAR (C-, L- and P-band) data are available for the summer of 1991. Based on ground-truth data collected during the flights, simple SAR-soil moisture relationships are established. This allows the estimation of the spatial variation of surface soil moisture at the field scale. From hydrological and meteorological data acquired during the experiment, a conceptual water and energy balance model was calibrated. Simulation results for soil moisture are then compared with SAR-based soil moisture estimates. The comparison between sampled, modelled and SAR-derived soil moisture at the transect scale is acceptable, but the spatial patterns of soil moisture predicted by the conceptual model and the SAR images are different owing to the influence of vegetation. The results are also useful in pointing out some of the major problems encountered in the application of SAR data at the catchment scale.

Original languageEnglish (US)
Pages (from-to)445-459
Number of pages15
JournalJournal of Hydrology
Volume166
Issue number3-4
StatePublished - Apr 1995
Externally publishedYes

Fingerprint

synthetic aperture radar
hydrological modeling
remote sensing
soil moisture
soil water
catchment
methodology
Italy
hydrologic data
evaluation
distribution
meteorological data
water balance
energy balance
England
spatial variation
water budget
flight
transect
climate

ASJC Scopus subject areas

  • Water Science and Technology
  • Soil Science
  • Earth-Surface Processes

Cite this

Evaluation of surface soil moisture distribution by means of SAR remote sensing techniques and conceptual hydrological modelling. / Giacomelli, Andrea; Bacchiega, Ugo; Troch, Peter A; Mancini, Marco.

In: Journal of Hydrology, Vol. 166, No. 3-4, 04.1995, p. 445-459.

Research output: Contribution to journalArticle

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