We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Soil moisture retrieval through a merging of multi-temporal L-band SAR data and hydrologic modelling.
- Authors
Mattia, F.; Satalino, G.; Pauwels, V. R. N.; Loew, A.
- Abstract
The objective of the study is to investigate the potential of retrieving superficial soil moisture content (mv) from multi-temporal L-band synthetic aperture radar (SAR) data and hydrologic modelling. The study focuses on assessing the performances of an L-band SAR retrieval algorithm intended for agricultural areas and for watershed spatial scales (e.g. from 100 to 10000km²). The algorithm transforms temporal series of L-band SAR data into soil moisture contents by using a constrained minimization technique integrating a priori information on soil parameters. The rationale of the approach consists of exploiting soil moisture predictions, obtained at coarse spatial resolution (e.g. 15- 30km²) by point scale hydrologic models (or by simplified estimators), as a priori information for the SAR retrieval algorithm that provides soil moisture maps at high spatial resolution (e.g. 0.01 km²). In the present form, the retrieval algorithm applies to cereal fields and has been assessed on simulated and experimental data. The latter were acquired by the airborne E-SAR system during the AgriSAR campaign carried out over the Demmin site (Northern Germany) in 2006. Results indicate that the retrieval algorithm always improves the a priori information on soil moisture content though the improvement may be marginal when the accuracy of prior mv estimates is better than 5%.
- Subjects
GERMANY; RESEARCH; HYDROLOGY; EARTH sciences; HYDRAULICS; FLUID mechanics; SOIL moisture; HYDROLOGIC models; HYDROLOGICAL forecasting
- Publication
Hydrology & Earth System Sciences, 2009, Vol 13, Issue 3, p343
- ISSN
1027-5606
- Publication type
Article
- DOI
10.5194/hess-13-343-2009