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URN: urn:nbn:de:kobv:517-opus-16979
URL: http://opus.kobv.de/ubp/volltexte/2008/1697/
Elsenbeer, Helmut ;
Cassel, Keith ;
Castro, Jorge
Spatial analysis of soil hydraulic conductivity in a tropical rain forest catchment
Kurzfassung in Englisch
The topography of first-order catchments in a region of western Amazonia was found to exhibit distinctive, recurrent features: a steep, straight lower side slope, a flat or nearly flat terrace at an intermediate elevation between valley floor and interfluve, and an upper side slope connecting interfluve and intermediate terrace. A detailed survey of soil-saturated hydraulic conductivity (K sat)-depth relationships, involving 740 undisturbed soil cores, was conducted in a 0.75-ha first-order catchment. The sampling approach was stratified with respect to the above slope units. Exploratory data analysis suggested fourth-root transformation of batches from the 0–0.1 m depth interval, log transformation of batches from the subsequent 0.1 m depth increments, and the use of robust estimators of location and scale. The K sat of the steep lower side slope decreased from 46 to 0.1 mm/h over the overall sampling depth of 0.4 m. The corresponding decrease was from 46 to 0.1 mm/h on the intermediate terrace, from 335 to 0.01 mm/h on the upper side slope, and from 550 to 0.015 mm/h on the interfluve. A depthwise comparison of these slope units led to the formulation of several hypotheses concerning the link between K sat and topography.
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Institut 1: |
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Institut für Geoökologie |
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Institut 2: |
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Extern |
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DDC-Sachgruppe: |
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Geowissenschaften |
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Dokumentart: |
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c Postprint |
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Schriftenreihe: |
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Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, ISSN 1866-8372 |
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Bandnummer: |
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paper 051 |
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Quelle: |
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Water Resources Research. - 28 (1992), 12, p. 3201 - 3214. - ISSN 0043-1397 |
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Sprache: |
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Englisch |
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Erstellungsjahr: |
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1992 |
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Publikationsdatum: |
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28.03.2008 |
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Bemerkung: |
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first published in: Water Resources Research - 28 (1992), 12, p. 3201 - 3214
ISSN: 0043-1397
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Lizenz: |
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