Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Satellite-based radar interferometry to estimate large-scale soil water depletion from clay shrinkage: possibilities and limitations
Autor te Brake, B.; Hanssen, R.F.; van der Ploeg, M.J.; de Rooij, G.H.;
Journal / Serie Vadose Zone Journal
Erscheinungsjahr 2013
Department BOPHY;
Band/Volume 12
Heft 3
Sprache englisch;
POF III (gesamt) T31;
Keywords DEM, digital elevation model; DInSAR, differential interferometric synthetic aperture radar; InSAR, interferometric synthetic aperture radar; SAR, synthetic aperture radar.
UFZ Querschnittsthemen RU1
Abstract Satellite-based radar interferometry is a technique capable of measuring small surface
elevation changes at large scales and with a high resolution. In vadose zone hydrology,
it has been recognized for a long time that surface elevation changes due to swell and
shrinkage of clayey soils can serve as an estimate for soil water storage change. Therefore,
satellite-based radar interferometry can potentially offer an alternative methodology
to estimate soil water storage change at field or regional scales. This paper introduces
principles of satellite-based radar interferometry and identifies limitations and potential
applications of the technique to measure surface elevation changes from clay shrinkage.
In situ measurements were performed and a linear relation between soil water storage
depletion and layer shrinkage was obtained. Data from the TerraSAR-X satellite over the
measurement area were analyzed to identify the most favorable conditions for radar
interferometry to measure vertical shrinkage. High-quality phase observations over clayey
areas in polders with limited vegetation can be explained from differences in land use and
soil type. Signal noise over sparsely vegetated agricultural fields was successfully reduced
by multilooking over agricultural fields at the cost of spatial resolution. Good resemblance
between in situ measured shrinkage and differential phase change was found in a test
period. Based on this study, we expect that radar interferometric processing of data from
the future satellite mission Sentinel-1 can play a crucial role in providing much-needed
observations of vadose zone processes at the field scale and beyond.
ID 13747
dauerhafte UFZ-Verlinkung http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=13747
te Brake, B., Hanssen, R.F., van der Ploeg, M.J., de Rooij, G.H. (2013):
Satellite-based radar interferometry to estimate large-scale soil water depletion from clay shrinkage: possibilities and limitations
Vadose Zone J. 12 (3), 10.2136/vzj2012.0098