Spatially heterogeneous relief changes, soil formation and floodplain aggradation under human impact – geomorphological results from the Upper Rhine Graben (SW Germany)

Holzhauer, Ingmar; Kadereit, Annette; Schukraft, Gerd; Kromer, Bernd; Bubenzer, Olaf

doi:10.1127/zfg_suppl/2017/0357

Cited by 2 publications

(3 citation statements)

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“…-The first is precipitation within the sediment body at distinct substrate boundaries in the groundwater fluctuation zone, along the capillary fringe, as described for the so-called Rheinweiß in similar contexts (Dambeck, 2005;Holzhauer, 2013;Holzhauer et al, 2017). Being this close to the present-day land surface, the Rheinweiß represents a relict feature.…”

Section: Fluvial Activity As Reconstructed From Facies Patternsmentioning

confidence: 94%

“…The Lower Terrace around the study sites shows varying ratios of sand and gravel, has an irregular surface, is cut by BSN channels, and is overlain by up to several metres of BSN-related sand-and silt-dominated flood deposits (Barsch and Mäusbacher, 1979;Löscher, 2007). During the late Pleistocene-Holocene transition, dunes formed on top of the silt-and sand-covered Lower Terrace (Löscher, 2007;Löscher et al, 1989) as elements of a larger regional dune system covering substantial parts of the northern Upper Rhine Graben (Dambeck, 2005;Holzhauer, 2013;Holzhauer et al, 2017;Pflanz et al, 2022).…”

Section: Regional Settingmentioning

confidence: 99%

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Fluvial activity of the late-glacial to Holocene “Bergstraßenneckar” in the Upper Rhine Graben near Heidelberg, Germany – first results

Engel

Henselowsky

Roth

et al. 2022

E&G Quaternary Sci. J.

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Abstract. The term “Bergstraßenneckar” (BSN) refers to an abandoned course of the river Neckar. It flowed in a northern direction east of the river Rhine in the eastern part of the northern Upper Rhine Graben in southwestern Germany. The former meandering course merged with the Rhine ca. 50 km further north of the site of the present-day confluence near Mannheim. The palaeo-channels are still traceable by their depressional topography, in satellite images and by the curved boundaries of adjacent settlements and land parcels. In the plan view, satellite and aerial images reveal a succession of meander bends, with older bends being cut off from younger channels. Based on stratigraphic investigations of the channel infill in the northern part of the BSN, fluvial activity is assumed from ca. 14 500 years ago until the onset of the Holocene. We present results of the first stratigraphic investigations at two sites in the southern part of the BSN near Heidelberg (Rindlache, Schäffertwiesen), together with results from granulometric, carbonate and organic content analyses, as well as electrical resistivity tomography (ERT) measurements. The data clearly show a change from high-energy fluvial bedload (sand, gravel) to low-energy fluvio-limnic suspended load (organoclastic and calcareous mud) and to peat formation. Radiocarbon dating indicates a time lag of ca. 1500 years between the cut-off meander site (Schäffertwiesen) and the younger site (Rindlache) that was possibly still active until the present-day confluence near Mannheim was established and the BSN eventually became abandoned. Our preliminary data conform with the pedo-sedimentary evidence from the northern BSN, but slight differences in the stratigraphic pattern of the youngest channels are identified: whilst for the younger channel sections of the northern BSN the channel-bottom facies (sand, gravel) is directly overlain by peat, the channel at Rindlache shows substantial intervening mud deposition, which is interpreted as suspension load from flooding by the new Neckar channel nearby. The study shows that more chronostratigraphic data from channel sections of the southern BSN are needed to better constrain the timing of the fluvial activity and to decipher the reasons for the abandonment of the BSN. These data are also necessary to better understand the pattern of temporary reactivation of the BSN channels across the Holocene and their usage by humans, which can be deduced from historical sources and archaeological data.

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Section: Fluvial Activity As Reconstructed From Facies Patternsmentioning

confidence: 94%

Section: Regional Settingmentioning

confidence: 99%

Fluvial activity of the late-glacial to Holocene “Bergstraßenneckar” in the Upper Rhine Graben near Heidelberg, Germany – first results

Engel

Henselowsky

Roth

et al. 2022

E&G Quaternary Sci. J.

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“…In contrast to earlier periods, these environmental changes were not just caused by natural forces but also by the expanding human impact on the environment. Human activity (deforestation, agriculture, and pastoralism), which had begun in the southern Upper Rhine region during the Atlantic, increased significantly from the Subboreal to the Subatlantic over a part of the catchment (Schneider, 2000;Kalis et al, 2003;Lang et al, 2003;Mäckel et al, 2009;Holzhauer et al, 2017). Both climate and human factors led to higher rates of soil erosion and increased runoff and sediment supply to the Rhine and Ill fluvial systems (Al Siddik et al, 1989;Schneider, 2000;Dambeck and Thiemeyer, 2002;Lang et al, 2003;Bos et al, 2008;Hoffman et al, 2008;Erkens et al, 2009).…”

Section: Mid-to Late Holocene (Subboreal and Subatlantic Periods)mentioning

confidence: 99%

Late glacial to Holocene fluvial dynamics in the Upper Rhine alluvial plain, France

Abdulkarim,

Schmitt,

Fülling

et al. 2024

Quat. res.

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High-resolution sedimentological and geochronological investigations of paleochannel systems in the Ried Central d'Alsace (northeastern France) allow for the reconstruction of the late glacial and Holocene fluvial evolution of this section of the Upper Rhine alluvial plain. During the Oldest Dryas, the landscape featured a dominant braided Rhine system and, to a lesser extent, a braided Fecht system. The shift to the Bølling-Allerød saw a narrowing of the Rhine's active channel belt, the development of a complex channel pattern, and the genesis of the Ill River. The river channel patterns remained unchanged during the Younger Dryas. In the Early Holocene, the Rhine's active belt narrowed further, and the Rhine and Ill Rivers developed braided-anastomosing and anastomosing channel patterns, respectively. Throughout the Holocene, both rivers maintained their channel patterns while migrating east and west across the alluvial plain, respectively. In the late glacial, fluvial dynamics in this section of the Upper Rhine plain were primarily influenced by climate-related environmental and hydrogeomorphological changes. Conversely, during the Holocene, the evolution of the fluvial hydrosystems was driven by a complex interaction of climatic and non-climatic factors, including human activity at the catchment scale, alluvial plain architecture, and local neotectonics.

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Spatially heterogeneous relief changes, soil formation and floodplain aggradation under human impact – geomorphological results from the Upper Rhine Graben (SW Germany)

Cited by 2 publications

References 0 publications

Fluvial activity of the late-glacial to Holocene “Bergstraßenneckar” in the Upper Rhine Graben near Heidelberg, Germany – first results

Fluvial activity of the late-glacial to Holocene “Bergstraßenneckar” in the Upper Rhine Graben near Heidelberg, Germany – first results

Late glacial to Holocene fluvial dynamics in the Upper Rhine alluvial plain, France

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