The influence of soil properties in estimating soil moisture from satellite C-band synthetic aperture radar

Beale, John; Waine, Toby; Corstanje, Ron; Snapir, Boris; Evans, Jonathan ORCID: 2019 The influence of soil properties in estimating soil moisture from satellite C-band synthetic aperture radar. Geophysical Research Abstracts, 21, EGU2019-19152. 1, pp.

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Regularly updated soil moisture maps are needed that combine wide scale for regional and national studies, whilstcapturing the field-scale variability that is needed by many applications in agriculture, hydrology and meteorology.C-band SAR satellites, such as Sentinel-1, offer the high spatial and temporal resolution required, but the estimationof soil moisture from SAR requires correction for many contributing factors including vegetation, soil roughness,soil texture and temperature. This paper reviews and predicts the significance of soil texture and organic mattercontent to the errors that may be present in any estimation that is made using default assumptions. We showthat each factor may contribute to a 10% error if an incorrect assumption is made. Soil moisture retrieval overagricultural fields in northern latitudes requires any algorithm to account for rapid and large changes in SARbackscatter due to crop growth and harvesting, tillage operations and freezing of the soil surface. This has particularsignificance for the extending the use of change detection approaches into arable farming areas. We discuss theprospect for developing a model to guide the setting of soil roughness parameters based on land use, soil textureand tillage, and for automatic correction for frozen soil. Successful implementation will improve the accuracy andvalidity of estimating soil moisture from C-band SAR satellite data, at the field scale.

Item Type: Publication - Article
UKCEH and CEH Sections/Science Areas: Hydro-climate Risks (Science Area 2017-)
ISSN: 1607-7962
Additional Information. Not used in RCUK Gateway to Research.: Abstract relates to a Poster presentation at the EGU 2019 General Assembly. Abstract is available via Official URL link.
NORA Subject Terms: Agriculture and Soil Science
Date made live: 20 Apr 2020 11:41 +0 (UTC)

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