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| Titel |
A soil toposequence characterization on evaporites in the semiarid Central Ebro Basin (NE-Spain) |
| VerfasserIn |
J. Martínez-Aznar, D. Badía-Villas, C. Martí-Dalmau, F. J. León-Miranda |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250058974
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| Zusammenfassung |
| Central Ebro Basin is a semi-arid region where evapotranspiration exceeds considerably the
precipitation, and where Miocene gypsum (CaSO4.2H2O) is abundant as soil parent material
(ITGE, 1995). These are favourable conditions to develop gypseous soils, which cover less
tan 1% of the Earth’s land surface, being especially scarce in Europe (IUSS, 1998). In order
to get a detailed soil description of soils distribution along the landscape, the morphological,
physical and chemical properties of five selected soil profiles along a slope were determined.
Soils were classified using the Soil Taxonomy System (STS) and the World Reference Base
(WRB).
Geomorphic unitSoil forming processes Horizons and
diagnostic properties Soil Taxonomy System
(SSS, 2006) World Reference Base
(IUSS, 2006)
Head slope Erosion Gypsiric material
Lithic contact Lihic Torrirorthent Haplic Gypsiric Leptosol
Shoulder slope Gypsification Hypergypsic
Lithic contact Lithic Haplogypsid Hypergypsic Leptic
Gypsisol
Back slope Gypsification Hypergypsic Xeric Haplogypsid Hypergypsic Humic
Gypsisol
Foot slope Gypsification Gypsic Xeric Haplogypsid Haplic Humic Gypsisol
Toes slope Gypsification SalinizationGypsic & Salic
Fluvic properties Xeric Haplogypsid Endosalic Skeletic
Gypsisol
Table 1. Soil forming processes, horizons and diagnostic properties and classification of
the soils studied by the WRB (IUSS, 2006) taxonomy system and Soil Taxonomy System
(SSS, 2006).
The surface horizons on the top of the slope have the lowest soil organic matter
and soil aggregate stability value, both directly and significantly related (R: 0.89;
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