Application of ground‐penetrating radar to determine the thickness of Pleistocene periglacial slope deposits
Identifieur interne : 000850 ( Main/Exploration ); précédent : 000849; suivant : 000851Application of ground‐penetrating radar to determine the thickness of Pleistocene periglacial slope deposits
Auteurs : Daniela Sauer [Allemagne] ; Peter Felix Enningsen [Allemagne]Source :
- Journal of Plant Nutrition and Soil Science [ 1436-8730 ] ; 2004-12.
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Abstract
Wide areas of the mountainous regions of Germany have rock covered by Pleistocene periglacial slope deposits (PPSD), formed by gelifluction during the cold periods of the ice ages in non‐glaciated areas. The PPSD provide the parent material for soil development, and their physical characteristics affect several stabile soil properties. Because the PPSD play a significant ecological role, we studied the spatial distribution and properties of the PPSD in order to assess the distribution of the stabile soil properties. The high stone content of the PPSD greatly hinders augering and digging. Hence, we tested the use of ground‐penetrating radar (GPR) as a potentially time‐saving, non‐destructive method to determine the thickness of the PPSD. In several study areas of the Rhenish Massif, GPR investigations of single soil profiles and soil transects along an exposed gas‐pipeline ditch were carried out. The GPR images were compared to the actual thickness of the layers of the PPSD exposed in the profiles and the ditch. In the GPR images usually at least one distinct boundary could be identified, which occurs at the transition between the loose material and the hard rock, mostly ranging between 50 and 150 cm depth. In some cases, in which stone content changed abruptly between different layers of the PPSD, also the boundaries between these layers could be identified in the GPR image. On the other hand, in areas where remnants of the Mesozoic‐Tertiary weathering mantle are preserved, the boundary between the saprolite and the overlying basal layer of the PPSD is ambiguous or not at all visible.
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DOI: 10.1002/jpln.200421433
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Pflanzenernähr. Bodenk.</title><idno type="ISSN">1436-8730</idno><idno type="eISSN">1522-2624</idno><imprint><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Weinheim</pubPlace><date type="published" when="2004-12">2004-12</date><biblScope unit="volume">167</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="752">752</biblScope><biblScope unit="page" to="760">760</biblScope></imprint><idno type="ISSN">1436-8730</idno></series><idno type="istex">AC688646A1D3E38DC73B891568CCA0096F7858B0</idno><idno type="DOI">10.1002/jpln.200421433</idno><idno type="ArticleID">JPLN200421433</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1436-8730</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Pleistocene periglacial slope deposits (PPSD)</term><term>Rhenish Massif</term><term>ground‐penetrating radar (GPR)</term><term>stone content</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Wide areas of the mountainous regions of Germany have rock covered by Pleistocene periglacial slope deposits (PPSD), formed by gelifluction during the cold periods of the ice ages in non‐glaciated areas. The PPSD provide the parent material for soil development, and their physical characteristics affect several stabile soil properties. Because the PPSD play a significant ecological role, we studied the spatial distribution and properties of the PPSD in order to assess the distribution of the stabile soil properties. The high stone content of the PPSD greatly hinders augering and digging. Hence, we tested the use of ground‐penetrating radar (GPR) as a potentially time‐saving, non‐destructive method to determine the thickness of the PPSD. In several study areas of the Rhenish Massif, GPR investigations of single soil profiles and soil transects along an exposed gas‐pipeline ditch were carried out. The GPR images were compared to the actual thickness of the layers of the PPSD exposed in the profiles and the ditch. In the GPR images usually at least one distinct boundary could be identified, which occurs at the transition between the loose material and the hard rock, mostly ranging between 50 and 150 cm depth. In some cases, in which stone content changed abruptly between different layers of the PPSD, also the boundaries between these layers could be identified in the GPR image. On the other hand, in areas where remnants of the Mesozoic‐Tertiary weathering mantle are preserved, the boundary between the saprolite and the overlying basal layer of the PPSD is ambiguous or not at all visible.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country></list><tree><country name="Allemagne"><noRegion><name sortKey="Sauer, Daniela" sort="Sauer, Daniela" uniqKey="Sauer D" first="Daniela" last="Sauer">Daniela Sauer</name></noRegion><name sortKey="Felix Enningsen, Peter" sort="Felix Enningsen, Peter" uniqKey="Felix Enningsen P" first="Peter" last="Felix Enningsen">Peter Felix Enningsen</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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