Fluvial responses to the Weichselian ice sheet advances and retreats: implications for understanding river paleohydrology and pattern changes in Central Poland

Weckwerth, Piotr

doi:10.1007/s00531-017-1545-y

Cited by 25 publications

(19 citation statements)

References 131 publications

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“…This erosion can form a stage of the downstream migration of mid-channel bars, the result of turbulent flow instability occurring on erodible beds (Ashworth et al., 2000; Colombini et al., 1987; Tubino, 1991), or affected by variable channel discharges and the geometry of nearby bars (Rodrigues et al., 2015). Additionally, numerous cross-bar channels form during falling flow stages that dissect the mid-bars into smaller portions (Figure 6(a)) (Lunt et al., 2004; Smith et al., 2006; Weckwerth, 2018).…”

Section: Resultsmentioning

confidence: 99%

Sandbody architecture analysis of braided river reservoirs and their significance for remaining oil distribution: A case study based on a new outcrop in the Songliao Basin, Northeast China

Zang

Bao

et al. 2020

Energy Exploration & Exploitation

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The reservoir architecture analysis of braided rivers, especially falling-silt seam forms, has played a key role in predicting remaining oil distributions. However, no studies have used architecture analyses that document braided river outcrops and researched the tapping of the few remaining oil distributions based on outcrops in the Songliao basin, northeast China. In this paper, the architecture characteristics and remaining oil distribution of braided river reservoirs are studied using a combination of an outcrop, modern deposition and subsurface well data. The new 8–13 m thick Lower Cretaceous Quantou Formation outcrop of the Songliao basin is a braided fluvial succession arranged in one large fining-upward cycle. Eight facies (Gt, St, Sm, Sh, Sp, Sw, Fl and Fm), four architecture elements (CH, DA, LV, and FF), and three orders of bounding surfaces (third-, fourth-, and fifth-order) are recognized. A new distribution pattern of falling-silt seams and a braided river architecture model are presented according to the analysis of the outcrop. In the mid-channel bar, the falling-silt seams thin from the mid-bar to the bar tail following the flow direction. Each falling-silt seam is oriented tangentially to the basal surface of the mid-channel bar, and the upper falling-silt seam extends farther than the lower one. In a Daqing Oilfield exploitation block in the Songliao basin, while channels and bars are the main reservoir units, they have different remaining oil distribution patterns. For bars, water injection wells located at the mid-bar, zonal injection technology, the drilling of horizontal wells, and proper well patterns are proposed. Fourth-order bounding surfaces, single braided channels, stacking patterns, and the lateral blocking of levees and floodplains are the key factors affecting the remaining oil distribution in channels.

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Section: Resultsmentioning

confidence: 99%

Sandbody architecture analysis of braided river reservoirs and their significance for remaining oil distribution: A case study based on a new outcrop in the Songliao Basin, Northeast China

Zang

Bao

et al. 2020

Energy Exploration & Exploitation

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“…The Pleistocene ice sheets eroded the valley within the Miocene deposits. The initial form of the Valley was probably re-eroded many times during the Pleistocene (Mojski 2005;Weckwerth 2018). The Lower Vistula Valley was finally formed as a result of the last ice sheet recession followed by the water flowing to the north and the fluvial erosion in the Allerød Phase ca.…”

Section: Study Areamentioning

confidence: 99%

Geoheritage of Postglacial Areas in Northern Poland—Prospects for Geotourism

et al. 2020

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This study aims to identify potential geosites and show existing geosites in a young glacial landscape in northern Poland through a qualitative assessment of the local geoheritage. Three areas of diversified morphology and geology located within the extent of the last Scandinavian Ice Sheet have been selected as the research polygons: the northeastern part of the Dobrzyń Lake District, the Lower Vistula Valley and the Kashubian Lake District. Three basic abiotic components of the environment have been analysed: geology, terrain relief and hydrology. This research is based on some specific materials including maps and photographs. Methodology of this research includes the inventory, characterization and assessment of selected areas. The final results are proposals for geosites of high educational value in each of the three investigated regions. For the northeastern part of the Dobrzyń Lake District, the creation of a geopark has been proposed, and the geosites of the Lower Vistula Valley provide the potential for a geotourist footpath to be designed. The Kashubian Lake District is characterised by the occurrence of numerous glacial landforms and sediments as well as high denivelations and a concentration of erratic boulders. Therefore, this region also has the potential to be selected for valuable geosites and the designing of a geotourist footpath.

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“…The results of previously published studies on this topic in a relatively small area (representing two large rivers in Poland [11][12][13][14][15][16][17][18]) indicate the existence of a specific geological pattern under the rivers flowing through the lowland landscape: the river prefers somehow to flow atop the bedrock protrusion.…”

Section: Introductionmentioning

confidence: 99%

“…Erosional processes in lowland rivers usually act in Holocene in alluvial deposits [2,29,30]. If the lowland was glaciated in Pleistocene by several advances of ice sheets, rivers had to cut through the glacial moraines [18], especially in the case of rivers flowing to the Baltic Sea in Germany, Poland, Lithuania, Latvia, and Northwest Russia, where ice sheets advanced upslope, in contrast to the Interior Plains of Northern America [7,[31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Rivers Try Harder. Reversed “Differential Erosion” as Geological Control of Flood in the Large Fluvial Systems in Poland

Bihałowicz

Wierzbicki

2021

Water

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We study cross-sections on the Detailed Geological Map of Poland (SMGP) to find a geologic and geomorphic pattern under river valleys in Poland. The pattern was found in 20 reaches of the largest Polish rivers (Odra, Warta, Vistula, Narew, and Bug) located in the European Lowland, in the landscape of old (Pleistocene, Saalian) glacial high plains extending between the Last Glacial Maximum (LGM) moraines on the North and the Upland on the South. The Upland was slightly folded and up-faulted during Alpine orogeny together with the thrust of Carpathian nappes and the uplift of Tatra Mts. and Sudetes. The found pattern is an alluvial river with broad Holocene floodplain and the channel developed atop the protrusion of bedrock (Jurassic, Cretaceous limestones, marlstones, sandstones) or non-alluvial, cohesive, overconsolidated sediments resistant to erosion (glacial tills, lacustrine or “ice-dammed lake” clays) of Cenozoic (Paleogene, Neogene, Quaternary—Elsterian). We regard the sub-alluvial protrusion as the limit of river incision and scour. It cannot be determined why the river flows atop these protrusions, in opposition to “differential erosion”, a geomorphology principle. We assume it is evidence of geological flood control. We propose an environmental and geomorphological framework for the hydrotechnical design of instream river training.

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Fluvial responses to the Weichselian ice sheet advances and retreats: implications for understanding river paleohydrology and pattern changes in Central Poland

Abstract: of lithotype B3 and energy of sedimentary environment was more stable than during the deposition of lithotype B2.

Cited by 25 publications

References 131 publications

Sandbody architecture analysis of braided river reservoirs and their significance for remaining oil distribution: A case study based on a new outcrop in the Songliao Basin, Northeast China

Sandbody architecture analysis of braided river reservoirs and their significance for remaining oil distribution: A case study based on a new outcrop in the Songliao Basin, Northeast China

Geoheritage of Postglacial Areas in Northern Poland—Prospects for Geotourism

Rivers Try Harder. Reversed “Differential Erosion” as Geological Control of Flood in the Large Fluvial Systems in Poland

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