Multifrequency radar observations of bare surface soil moisture content

A laboratory experiment

Marco Mancini, Rudi Hoeben, Peter A Troch

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

This paper reports on a laboratory experiment that investigates the use of active microwave observations to estimate volumetric soil moisture content. The experiment, held in 1995, was set up at the European Microwave Signature Laboratory, Joint Research Centre of the European Communities, Ispra (Italy). Full polarimetric radar observations of a 2 m diameter cylindric container filled with a sandy loam soil were performed. During successive wetting and drying cycles, different soil moisture profiles were generated and observed in situ by means of time domain reflectometry probes. The radar data are analyzed based on the Integral Equation Model that simulates radar backscattering given known surface characteristics, such as moisture content and roughness. This allows the evaluation of the predictive power of the simulation model. We find general good agreement between measurements and simulations, but problems occur at high incidence angles. The model is then used to invert soil moisture information from radar measurements. It is shown that, in spite of the complexity of the model involved, it is possible to retrieve under certain circumstances reliable soil moisture estimates with similar accuracies as the in situ measurements.

Original languageEnglish (US)
Pages (from-to)1827-1838
Number of pages12
JournalWater Resources Research
Volume35
Issue number6
DOIs
StatePublished - 1999
Externally publishedYes

Fingerprint

radar
Soil moisture
soil water content
moisture content
Radar
Moisture
soil moisture
soil water
Experiments
Microwaves
Radar measurement
time domain reflectometry
roughness
Backscattering
sandy loam soils
sandy loam
angle of incidence
wetting
in situ measurement
probes (equipment)

ASJC Scopus subject areas

  • Aquatic Science
  • Environmental Science(all)
  • Environmental Chemistry
  • Water Science and Technology

Cite this

Multifrequency radar observations of bare surface soil moisture content : A laboratory experiment. / Mancini, Marco; Hoeben, Rudi; Troch, Peter A.

In: Water Resources Research, Vol. 35, No. 6, 1999, p. 1827-1838.

Research output: Contribution to journalArticle

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