Academia.eduAcademia.edu

Figure 11 – uploaded by Hans von Suchodoletz

See full PDFdownloadDownload figure
FIGURE 12 Schematic maps of the spatial distributions of different fine-grained fluvial sediment generations with paleochannels at the studied sites: (a) Salsitz, (b) Trebnitz, (c) Meilitz. Notes: (i) The spatial classification of the FFSGs was obtained by combining the relative average thicknesses of fine-grained sediments from the EMI measurements with the stratigraphic information from the transects. (ij) Paleochannels were either identified by their thicker fine-grained infill, or by basal BD/CH gravels with a higher-elevated upper altitude compared with their surroundings weakly developed paleosol M-PS-1a was found. Brick fragments in |. Likewise, gravel aggradation is also suggested by regularly occurring

Figure 12 Schematic maps of the spatial distributions of different fine-grained fluvial sediment generations with paleochannels at the studied sites: (a) Salsitz, (b) Trebnitz, (c) Meilitz. Notes: (i) The spatial classification of the FFSGs was obtained by combining the relative average thicknesses of fine-grained sediments from the EMI measurements with the stratigraphic information from the transects. (ij) Paleochannels were either identified by their thicker fine-grained infill, or by basal BD/CH gravels with a higher-elevated upper altitude compared with their surroundings weakly developed paleosol M-PS-1a was found. Brick fragments in |. Likewise, gravel aggradation is also suggested by regularly occurring

Related Figures (15)

FIGURE 1 Overview of the study area. (a) Location of the Weie Elster catchment in Central Germany. (b) The Weie Elster catchment. Highlighted are the floodplain area, the loess cover (after Eissmann, 2002), individual study sites and the main landscape units which are named according to Wagenbreth and Steiner (1990), Mannsfeld and Syrbe (2008) and BFN (2012). (c) Longitudinal profile and river development* (prior to artificial river straightening in the 1930s) of the Weie Elster River (Handel, 1969), with the locations of the studied sites. *River development measured along the river course = (river length - valley length)/valley length. Sources of the map topographies of (a) and (b): SRTM 90 m v. 4.1 data
FIGURE 1 Overview of the study area. (a) Location of the Weie Elster catchment in Central Germany. (b) The Weie Elster catchment. Highlighted are the floodplain area, the loess cover (after Eissmann, 2002), individual study sites and the main landscape units which are named according to Wagenbreth and Steiner (1990), Mannsfeld and Syrbe (2008) and BFN (2012). (c) Longitudinal profile and river development* (prior to artificial river straightening in the 1930s) of the Weie Elster River (Handel, 1969), with the locations of the studied sites. *River development measured along the river course = (river length - valley length)/valley length. Sources of the map topographies of (a) and (b): SRTM 90 m v. 4.1 data
FIGURE 2. The studied floodplain cross-sections (a) Salsitz, (b) Trebnitz, (c) Meilitz with floodplain altitudes above the current mean river level (vertical distance to channel up to 8 m above current mean river level; Bock & Kéthe, 2008), areas measured with electromagnetic induction and the transects where drill cores and electrical resistivity tomography measurements were carried out. A figure of the floodplain altitudes above the current mean river level without labelling and interpretations can be found in Figure $2. Please note that due to the applied spline extrapolation procedure, with increasing distance from the river the uncertainty of the calculated relative floodplain altitudes increases. DEM sources (horizontal resolution 1 x 1 m, vertical resolution 0.15-0.3 m): © GeoBasis-DE/LVermGeo LSA 2018, 52d/C22-8021041-18; © GDI-Th Freistaat Thueringen, TLVermGeo
FIGURE 2. The studied floodplain cross-sections (a) Salsitz, (b) Trebnitz, (c) Meilitz with floodplain altitudes above the current mean river level (vertical distance to channel up to 8 m above current mean river level; Bock & Kéthe, 2008), areas measured with electromagnetic induction and the transects where drill cores and electrical resistivity tomography measurements were carried out. A figure of the floodplain altitudes above the current mean river level without labelling and interpretations can be found in Figure $2. Please note that due to the applied spline extrapolation procedure, with increasing distance from the river the uncertainty of the calculated relative floodplain altitudes increases. DEM sources (horizontal resolution 1 x 1 m, vertical resolution 0.15-0.3 m): © GeoBasis-DE/LVermGeo LSA 2018, 52d/C22-8021041-18; © GDI-Th Freistaat Thueringen, TLVermGeo
FIGURE 4 Transect Salsitz. (a) Geophysical ERT measurements. (b) Levelled drill cores cores $C11-SC12, SC22, SC24, SC28-SC29, SC41, SC60-SC61, cores, allowing their discrimination from sediment singularities. Given
FIGURE 4 Transect Salsitz. (a) Geophysical ERT measurements. (b) Levelled drill cores cores $C11-SC12, SC22, SC24, SC28-SC29, SC41, SC60-SC61, cores, allowing their discrimination from sediment singularities. Given
FIGURE 6 (a) Geophysical EMI measurements (HCP3), averaging over the effective penetration depth up to 6.7 m around transect Salsitz. (b) Data from (a) with interpretations of the fluvial architecture. Note: We could not attribute the southernmost area with high ECa values to one of the three main fine-grained sediment generations. On the one hand, drill core SC-X (for core description, see the end of Table S1) showed gravels at a depth of about 2.45 m (similar to the gravel depths in the transect where it crosses the area with high ECa values between cores SC37 and SC67), which confirms the EMI measurements in the southernmost area with high ECa values. However, on the other hand, digital elevation data show lateral erosion of this area so that its surface is located about 1 m lower than in the adjacent eastern region (Figure 2a). Therefore, this area is marked with a questionmark. Source of orthophoto: © GeoBasis-DE/BKG 2018
FIGURE 6 (a) Geophysical EMI measurements (HCP3), averaging over the effective penetration depth up to 6.7 m around transect Salsitz. (b) Data from (a) with interpretations of the fluvial architecture. Note: We could not attribute the southernmost area with high ECa values to one of the three main fine-grained sediment generations. On the one hand, drill core SC-X (for core description, see the end of Table S1) showed gravels at a depth of about 2.45 m (similar to the gravel depths in the transect where it crosses the area with high ECa values between cores SC37 and SC67), which confirms the EMI measurements in the southernmost area with high ECa values. However, on the other hand, digital elevation data show lateral erosion of this area so that its surface is located about 1 m lower than in the adjacent eastern region (Figure 2a). Therefore, this area is marked with a questionmark. Source of orthophoto: © GeoBasis-DE/BKG 2018
FIGURE 7 _ Transect Trebnitz. (a) Geophysical ERT measurements. (b) Levelled drill cores
FIGURE 7 _ Transect Trebnitz. (a) Geophysical ERT measurements. (b) Levelled drill cores
FIGURE 9_ Transect Meilitz. (a) Geophysical ERT measurements. (b) Levelled drill cores FIGURE 8 (a) Geophysical EMI measurements (HCP3), averaging over the effective penetration depth up to 6.7 m around transect Trebnitz. (b) Data from (a) with interpretations of the fluvial architecture. Source of orthophoto: © GeoBasis-DE/BKG 2018
FIGURE 9_ Transect Meilitz. (a) Geophysical ERT measurements. (b) Levelled drill cores FIGURE 8 (a) Geophysical EMI measurements (HCP3), averaging over the effective penetration depth up to 6.7 m around transect Trebnitz. (b) Data from (a) with interpretations of the fluvial architecture. Source of orthophoto: © GeoBasis-DE/BKG 2018
‘IGURE 10 (a) Geophysical EMI measurements (HCP2), averaging over the effective penetration depth up to 4.2 m around transect Meilitz 9) Data from (a) with interpretations of the fluvial architecture.Source of orthophoto: © GeoBasis-DE/BKG 2018
‘IGURE 10 (a) Geophysical EMI measurements (HCP2), averaging over the effective penetration depth up to 4.2 m around transect Meilitz 9) Data from (a) with interpretations of the fluvial architecture.Source of orthophoto: © GeoBasis-DE/BKG 2018
FIGURE 11. Fluvial architecture of the three studied transects according to Houben (2007) with relative chronologica units and water levels during HQ100 and HQ200 floods: (a) Salsitz, (b) Trebnitz, (c) Meilitz. Notes: (i) The radiocarbon ages in Salsitz were taken from Ballasus et al. (2022). Unlike in that publication, after a careful re-evaluation of the original stratigraphical-sedimentological data we did not classify levee deposits in this transect. (ii) In many cases we could not safely discriminate the different BD/CH gravel generations at the bases of the floodplain deposits outside the areas with the oldest paleosols in the overlying FF sediments. Therefore, only in cases were we have evidence for concomitant aggradation (carbonate in the fine-grained matrices of most gravels of part C of Trebnitz, brick fragments in the gravels of part A in Meilitz) we classified the underlying basal gravels into the same generation as the overlying FF sediments. (iii) Sources of f ooding levels in Salsitz and Trebnitz: Landesbetrieb fiir Hochwasserschutz und Wasserwirtschaft Sachsen-Anhalt (https://Ihw.sachsen-anhalt.de/service/ hochwasserkarten). For Meilitz we could not show the flooding levels: Due to artificial damming, flood extension during th of the transect is not shown on the maps of the Thtiringer Landesamt fiir Umwelt, Bergbau und Naturschutz (cf. Figure 16 ese events in the area c)
FIGURE 11. Fluvial architecture of the three studied transects according to Houben (2007) with relative chronologica units and water levels during HQ100 and HQ200 floods: (a) Salsitz, (b) Trebnitz, (c) Meilitz. Notes: (i) The radiocarbon ages in Salsitz were taken from Ballasus et al. (2022). Unlike in that publication, after a careful re-evaluation of the original stratigraphical-sedimentological data we did not classify levee deposits in this transect. (ii) In many cases we could not safely discriminate the different BD/CH gravel generations at the bases of the floodplain deposits outside the areas with the oldest paleosols in the overlying FF sediments. Therefore, only in cases were we have evidence for concomitant aggradation (carbonate in the fine-grained matrices of most gravels of part C of Trebnitz, brick fragments in the gravels of part A in Meilitz) we classified the underlying basal gravels into the same generation as the overlying FF sediments. (iii) Sources of f ooding levels in Salsitz and Trebnitz: Landesbetrieb fiir Hochwasserschutz und Wasserwirtschaft Sachsen-Anhalt (https://Ihw.sachsen-anhalt.de/service/ hochwasserkarten). For Meilitz we could not show the flooding levels: Due to artificial damming, flood extension during th of the transect is not shown on the maps of the Thtiringer Landesamt fiir Umwelt, Bergbau und Naturschutz (cf. Figure 16 ese events in the area c)
FIGURE 13° Schematic development stages of the Wei@e Elster floodplain: (a) Salsitz, (b) Trebnitz, (c) Meilitz. Notes: (i) The locations of formerly active channels could not be determined, and are therefore mostly only shown at symbolic positions. (ii) It remains unclear whether there existed one or several main active channels during former periods. (iii) The limits between underlying Pleistocene and (presumed) overlying Holocene gravels could not be determined in the drill cores, so these are shown at symbolic positions
FIGURE 13° Schematic development stages of the Wei@e Elster floodplain: (a) Salsitz, (b) Trebnitz, (c) Meilitz. Notes: (i) The locations of formerly active channels could not be determined, and are therefore mostly only shown at symbolic positions. (ii) It remains unclear whether there existed one or several main active channels during former periods. (iii) The limits between underlying Pleistocene and (presumed) overlying Holocene gravels could not be determined in the drill cores, so these are shown at symbolic positions
FIGURE 15 _ Water courses during different periods since the end of the 18th century CE according to historical maps: (a) Salsitz, (b) Trebnit: and (c) Meilitz. Sources of the river courses: (a) and (d): IKSA (1808), RLA (1908), LVGSA (2008); (b) and (e): KPLA (1908), RLA (1924), TLVA (1993), LLDSA (1996); (c) and (f): SIK (1797), RLA (1928), TLVA (2004). In (a)-(c) the water courses are plotted above floodplain altitudes above the current mean river level (for details, see caption to Figure 2). A figure of these altitudes without labelling and interpretations can be found in Figure S2. In (d)-(f) the water courses are plotted above Google Earth™ satellite data originating from periods when floodplain structures were best recognizable
FIGURE 15 _ Water courses during different periods since the end of the 18th century CE according to historical maps: (a) Salsitz, (b) Trebnit: and (c) Meilitz. Sources of the river courses: (a) and (d): IKSA (1808), RLA (1908), LVGSA (2008); (b) and (e): KPLA (1908), RLA (1924), TLVA (1993), LLDSA (1996); (c) and (f): SIK (1797), RLA (1928), TLVA (2004). In (a)-(c) the water courses are plotted above floodplain altitudes above the current mean river level (for details, see caption to Figure 2). A figure of these altitudes without labelling and interpretations can be found in Figure S2. In (d)-(f) the water courses are plotted above Google Earth™ satellite data originating from periods when floodplain structures were best recognizable
FIGURE 16 Areas currently affected by HQ200 and HQ100 floods: (a) Salsitz, (b) Trebnitz and (c) Meilitz. Sources of potentially flooded areas: Salsitz and Trebnitz: Landesbetrieb ftir Hochwasserschutz und Wasserwirtschaft Sachsen-Anhalt (https://Ihw.sachsen-anhalt.de/service/ hochwasserkarten); Meilitz: Thiiringer Landesamt fiir Umwelt, Bergbau und Naturschutz (https://antares.thueringen.de/cadenza). Note that in Trebnitz, differences between the flooded areas occur between the northern and the southern part probably due to different databases of the federal states Thuringia (south) and Saxony-Anhalt (north). The flooded areas are plotted above floodplain altitudes above the current mean river level (for details, see caption to Figure 2). A figure of these altitudes without labelling and interpretations can be found in Figure $2
FIGURE 16 Areas currently affected by HQ200 and HQ100 floods: (a) Salsitz, (b) Trebnitz and (c) Meilitz. Sources of potentially flooded areas: Salsitz and Trebnitz: Landesbetrieb ftir Hochwasserschutz und Wasserwirtschaft Sachsen-Anhalt (https://Ihw.sachsen-anhalt.de/service/ hochwasserkarten); Meilitz: Thiiringer Landesamt fiir Umwelt, Bergbau und Naturschutz (https://antares.thueringen.de/cadenza). Note that in Trebnitz, differences between the flooded areas occur between the northern and the southern part probably due to different databases of the federal states Thuringia (south) and Saxony-Anhalt (north). The flooded areas are plotted above floodplain altitudes above the current mean river level (for details, see caption to Figure 2). A figure of these altitudes without labelling and interpretations can be found in Figure $2
Related topics:
Fluvial GeomorphologyGeophysical SurveyLittle Ice Age
580 California St., Suite 400
San Francisco, CA, 94104
© 2025 Academia. All rights reserved