Sediment rating and annual cycles of suspended sediment in German upland rivers
Sediment flux of lowland rivers is dominated by suspended transport, but data is often sparse and analysis largely relies on rating relationships. However, suspended sediment concentration is by no means constant in both, space and time. Here we analyse the variability of sediment rating curves and...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2018-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://doi.org/10.1051/e3sconf/20184004020 |
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doaj-art-5d952a800789493eb4fa9e60cab201032018-09-10T07:17:19ZengEDP SciencesE3S Web of Conferences2267-12422018-01-01400402010.1051/e3sconf/20184004020e3sconf_riverflow2018_04020Sediment rating and annual cycles of suspended sediment in German upland riversBlöthe JanHillebrand GudrunHoffmann ThomasSediment flux of lowland rivers is dominated by suspended transport, but data is often sparse and analysis largely relies on rating relationships. However, suspended sediment concentration is by no means constant in both, space and time. Here we analyse the variability of sediment rating curves and the seasonality of suspended sediment concentration in German waterways, as recorded by 10 gauging stations with catchment areas between 2600 - 22000 km2. Our data reveal a distinct break in power-law scaling relationships for all stations, with increased scaling exponents above threshold discharges close to the geometric mean. We attribute this mainly to the activation of sediment sources that resist mobilisation at lower flows. Furthermore, all stations show a counter-clockwise hysteresis effect throughout the year, where summer discharges have a higher sediment load than comparable winter discharges. Though the reasons for this pattern need further investigation, preliminary results show a strong correlation with rainfall erosivity and land-use parameters.https://doi.org/10.1051/e3sconf/20184004020 |
| institution |
Open Data Bank |
| collection |
Open Access Journals |
| building |
Directory of Open Access Journals |
| language |
English |
| format |
Article |
| author |
Blöthe Jan Hillebrand Gudrun Hoffmann Thomas |
| spellingShingle |
Blöthe Jan Hillebrand Gudrun Hoffmann Thomas Sediment rating and annual cycles of suspended sediment in German upland rivers E3S Web of Conferences |
| author_facet |
Blöthe Jan Hillebrand Gudrun Hoffmann Thomas |
| author_sort |
Blöthe Jan |
| title |
Sediment rating and annual cycles of suspended sediment in German upland rivers |
| title_short |
Sediment rating and annual cycles of suspended sediment in German upland rivers |
| title_full |
Sediment rating and annual cycles of suspended sediment in German upland rivers |
| title_fullStr |
Sediment rating and annual cycles of suspended sediment in German upland rivers |
| title_full_unstemmed |
Sediment rating and annual cycles of suspended sediment in German upland rivers |
| title_sort |
sediment rating and annual cycles of suspended sediment in german upland rivers |
| publisher |
EDP Sciences |
| series |
E3S Web of Conferences |
| issn |
2267-1242 |
| publishDate |
2018-01-01 |
| description |
Sediment flux of lowland rivers is dominated by suspended transport, but data is often sparse and analysis largely relies on rating relationships. However, suspended sediment concentration is by no means constant in both, space and time. Here we analyse the variability of sediment rating curves and the seasonality of suspended sediment concentration in German waterways, as recorded by 10 gauging stations with catchment areas between 2600 - 22000 km2. Our data reveal a distinct break in power-law scaling relationships for all stations, with increased scaling exponents above threshold discharges close to the geometric mean. We attribute this mainly to the activation of sediment sources that resist mobilisation at lower flows. Furthermore, all stations show a counter-clockwise hysteresis effect throughout the year, where summer discharges have a higher sediment load than comparable winter discharges. Though the reasons for this pattern need further investigation, preliminary results show a strong correlation with rainfall erosivity and land-use parameters. |
| url |
https://doi.org/10.1051/e3sconf/20184004020 |
| _version_ |
1612606991546449920 |