Accessibility navigation

The effects of scene heterogeneity on soil moisture retrieval from passive microwave data

Davenport, I. J., Sandells, M. J. and Gurney, R. J. (2008) The effects of scene heterogeneity on soil moisture retrieval from passive microwave data. Advances in Water Resources, 31 (11). pp. 1494-1502. ISSN 0309-1708

Text - Accepted Version
· Please see our End User Agreement before downloading.


It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1016/j.advwatres.2008.06.002


The s–x model of microwave emission from soil and vegetation layers is widely used to estimate soil moisture content from passive microwave observations. Its application to prospective satellite-based observations aggregating several thousand square kilometres requires understanding of the effects of scene heterogeneity. The effects of heterogeneity in soil surface roughness, soil moisture, water area and vegetation density on the retrieval of soil moisture from simulated single- and multi-angle observing systems were tested. Uncertainty in water area proved the most serious problem for both systems, causing errors of a few percent in soil moisture retrieval. Single-angle retrieval was largely unaffected by the other factors studied here. Multiple-angle retrievals errors around one percent arose from heterogeneity in either soil roughness or soil moisture. Errors of a few percent were caused by vegetation heterogeneity. A simple extension of the model vegetation representation was shown to reduce this error substantially for scenes containing a range of vegetation types.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Environmental Systems Science Centre
Interdisciplinary centres and themes > Soil Research Centre
ID Code:1199
Uncontrolled Keywords:Passive microwave; Soil moisture; Scene heterogeneity; Roughness; Vegetation; Water


Downloads per month over past year

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation