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- W4309264139 abstract "• The hydrographic basin of the Seridó River presented positive allometry in sedimentological terms for areas up to 400 km 2 . • The modelled data obtained values compatible with those measured, with an NSE coefficient of 0.54. • The morphostructural indicators showed anomalies in the area with SL above two, and HI above 0.5, which demonstrates a rejusvenized basin. • There is a well-defined relationship between the drainage basin area and specific sediment yield. • The laterisation and the rearrangement of drainage are the main factors that conditioned positive allometry. Sedimentological analyses are essential to understand the system that dictates the sediment yield processes of a basin. Basins have their own characteristics according to climatic, geological, geomorphological, pedological, and phytogeographic influences, on the sediment yield at different scales. This study evaluated the hydrosedimentological aspects of the Rio Seridó hydrographic basin to understand the sediment yield behaviour in the drainage area at different scales. Primary and secondary data, such as imagery (remote sensing), geostatistical methods, hydrosedimentological modelling, and calculations, were used to produce thematic maps, to implement theoretical–methodological revisions of the objects, and determine the specific sediment yield. The sediment delivery ratio was utilized to model the sediment yield at the basin scale, which was calculated using Maner’s Equation and the Universal Soil Loss Equation from 1992 to 2015. The measured data comprised sediment collection, a bathymetric survey of reservoirs, and erosion pins in the drainage basin on a timescaleof up to 82 years. The modelled sediment yield of the basin (2.5 t ha −1 y −1 ) was comparable to the measurements performed in the semiarid regions for basins of the same scale. The average sediment yield in the reservoirs (2.15 t ha −1 y −1 ) was very close to the modelled value. Positive allometry was identified for areas of up to 400 km 2 in the upper, middle, and lower reaches. Positive allometry was observed with an increase in sediment yield in the drainage area. Globally, this pattern is rare in regions that have not experienced glaciation and this identification is tan important contribution of this research." @default.
- W4309264139 created "2022-11-25" @default.
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- W4309264139 date "2023-02-01" @default.
- W4309264139 modified "2023-09-25" @default.
- W4309264139 title "Sediment yield in a basin in Brazilian Semiarid Regions: A discussion on positive allometry" @default.
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- W4309264139 doi "https://doi.org/10.1016/j.catena.2022.106749" @default.
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