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| Titel |
Measuring and modeling water-related soil-vegetation feedbacks in a fallow plot |
| VerfasserIn |
N. Ursino, G. Cassiani, R. Deiana, G. Vignoli, J. Boaga |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 18, no. 3 ; Nr. 18, no. 3 (2014-03-21), S.1105-1118 |
| Datensatznummer |
250120310
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| Publikation (Nr.) |
 copernicus.org/hess-18-1105-2014.pdf |
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| Zusammenfassung |
Land fallowing is one possible response to shortage of water for irrigation.
Leaving the soil unseeded implies a change of the soil functioning that has
an impact on the water cycle. The development of a soil crust in the open
spaces between the patterns of grass weed affects the soil properties and the
field-scale water balance. The objectives of this study are to test the
potential of integrated non-invasive geophysical methods and ground-image
analysis and to quantify the effect of the soil–vegetation interaction on the
water balance of fallow land at the local- and plot scale.
We measured repeatedly in space and time local soil saturation and vegetation
cover over two small plots located in southern Sardinia, Italy, during a
controlled irrigation experiment. One plot was left unseeded and the other
was cultivated. The comparative analysis of ERT maps of soil moisture
evidenced a considerably different hydrologic response to irrigation of the
two plots. Local measurements of soil saturation and vegetation cover were
repeated in space to evidence a positive feedback between weed growth and
infiltration at the fallow plot. A simple bucket model captured the different
soil moisture dynamics at the two plots during the infiltration experiment
and was used to estimate the impact of the soil vegetation feedback on the
yearly water balance at the fallow site. |
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