Morphometric and location factors shaping sediment texture in small floodplain reservoirs
| Autor: | Halina Smal, Joanna Gmitrowicz-Iwan, S Ligeza, Jacek Pranagal |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
geography
geography.geographical_feature_category Floodplain Stratigraphy Sediment Soil science 04 agricultural and veterinary sciences 010501 environmental sciences Silt 01 natural sciences Texture (geology) Maximum depth Particle-size distribution 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Levee Geology 0105 earth and related environmental sciences Earth-Surface Processes Sand fraction |
| Zdroj: | Journal of Soils and Sediments. 21:1243-1255 |
| ISSN: | 1614-7480 1439-0108 |
| Popis: | This paper investigates the morphological and location features influencing the sediment texture of small reservoirs located within the embanked floodplain of a lowland river. Bed and suspended loads deposited in these reservoirs, settle as sediments, whose texture could indicate factors shaping processes within the embanked floodplains. Sediment samples were extracted from three sections of each of 10 reservoirs and measured with respect to the grain size distribution. The statistical analyses determined factors affecting the texture and enabled the comparison of the reservoirs and their initial, middle, and final sections. Factors such as the length of the reservoir, its area, the distance from the river, the width of the embankment area, and the location along the river were found to have a negligible effect on proportion of sediment fractions. The maximum depth and the angle between the reservoir axis and the riverbed were the only two characteristics that notable contributed to the differences in the sediment texture. In deeper reservoirs the content of sand fraction was considerably higher, while simultaneously the share of silt was lower. The angle value influenced the sediment texture of each reservoir in general as well as considering their final parts. As the angle increased, the sand content increased as well, whereas the shares of silt and clay decreased. The maximum depth and the angle between the river and the reservoir can be considered as the key determinants of the sediment texture in small floodplain reservoirs. |
| Databáze: | OpenAIRE |
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