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| Titel |
Soil moisture and evapotranspiration of different land cover types in the Loess Plateau, China |
| VerfasserIn |
S. Wang, B. J. Fu, G. Y. Gao, X. L. Yao, J. Zhou |
| 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 ; 16, no. 8 ; Nr. 16, no. 8 (2012-08-22), S.2883-2892 |
| Datensatznummer |
250013435
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| Publikation (Nr.) |
 copernicus.org/hess-16-2883-2012.pdf |
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| Zusammenfassung |
| We studied the impacts of re-vegetation on soil moisture dynamics and
evapotranspiration (ET) of five land cover types in the Loess Plateau in
northern China. Soil moisture and temperature variations under grass
(Andropogon), subshrub (Artemisia scoparia), shrub (Spiraea pubescens),
plantation forest (Robinia pseudoacacia), and crop (Zea mays) vegetation were
continuously monitored during the growing season of 2011. There were more
than 10 soil moisture pulses during the period of data collection. Surface
soil moisture of all of the land cover types showed an increasing trend in
the rainy season. Soil moisture under the corn crop was consistently higher
than the other surfaces. Grass and subshrubs showed an intermediate moisture
level. Grass had slightly higher readings than those of subshrub most of the
time. Shrubs and plantation forests were characterized by lower soil
moisture readings, with the shrub levels consistently being slightly higher
than those of the forests. Despite the greater post-rainfall loss of
moisture under subshrub and grass vegetation than forests and shrubs,
subshrub and grass sites exhibit a higher soil moisture content due to their
greater soil retention capacity in the dry period. The daily ET trends of
the forests and shrub sites were similar and were more stable than those of
the other types. Soils under subshrubs acquired and retained soil moisture
resources more efficiently than the other cover types, with a competitive
advantage in the long term, representing an adaptive vegetation type in the
study watershed. The interactions between vegetation and soil moisture
dynamics contribute to structure and function of the ecosystems studied. |
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