Sediment Dynamics In Lacustrine Environments — Northern Amazon
Lakes are features found in Brazil’s northern region, commonly formed in sandy-clay layers of the Plio-Pleistocene, in a setting of the extensive flat surface, and under a high precipitation rate. Our goal in this work is to understand the sediment transport dynamic and its relation to the hydrologi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Lomonosov Moscow State University
2022-10-01
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| Series: | Geography, Environment, Sustainability |
| Subjects: | |
| Online Access: | https://ges.rgo.ru/jour/article/view/2607 |
| _version_ | 1797878383193882624 |
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| author | Raquel A. Alves Luiza C. Beserra Neta |
| author_facet | Raquel A. Alves Luiza C. Beserra Neta |
| author_sort | Raquel A. Alves |
| collection | DOAJ |
| description | Lakes are features found in Brazil’s northern region, commonly formed in sandy-clay layers of the Plio-Pleistocene, in a setting of the extensive flat surface, and under a high precipitation rate. Our goal in this work is to understand the sediment transport dynamic and its relation to the hydrological behavior of the regional lacustrine system. Two lakes were selected, Lago do Italiano (LIT) and Lago do Bicho (LB), situated in the municipality of Bonfim in the state of Roraima, Brazil. The lakes differ in hydrological regime, depth, and vegetation. The methodology involved bibliographical and remote sensor data and field surveys followed by laboratory processing. The results revealed that the lakes are composed of sandy materials, with layers what reach 95% of sand. The grains is medium to fine texture, with morphology angular (0 a 50%) and subangular (18% a 43%) grains, disposed at different depths. The grains’ morphology suggests that their sediment provider source is near and, at the same time, indicates a low energy environment. Concerning the mineralogical attributes, the sediments are of a quartzose nature, which permits their correlation with the arenites of the Boa Vista Formation, a sub-cropping unit. The sediment input is controlled by the seasonal oscillation of the groundwater level and inundation pulses that reach the fluviolacustrine plain of the Tacutu River in which the lakes are inserted. |
| first_indexed | 2024-04-10T02:32:20Z |
| format | Article |
| id | doaj.art-3c83b58c26a846cd85c7e1a953ccd7a5 |
| institution | Directory Open Access Journal |
| issn | 2071-9388 2542-1565 |
| language | English |
| last_indexed | 2024-04-10T02:32:20Z |
| publishDate | 2022-10-01 |
| publisher | Lomonosov Moscow State University |
| record_format | Article |
| series | Geography, Environment, Sustainability |
| spelling | doaj.art-3c83b58c26a846cd85c7e1a953ccd7a52023-03-13T07:52:35ZengLomonosov Moscow State UniversityGeography, Environment, Sustainability2071-93882542-15652022-10-01153616910.24057/2071-9388-2021-094621Sediment Dynamics In Lacustrine Environments — Northern AmazonRaquel A. Alves0Luiza C. Beserra Neta1Federal University of Minas GeraisFederal University of RoraimaLakes are features found in Brazil’s northern region, commonly formed in sandy-clay layers of the Plio-Pleistocene, in a setting of the extensive flat surface, and under a high precipitation rate. Our goal in this work is to understand the sediment transport dynamic and its relation to the hydrological behavior of the regional lacustrine system. Two lakes were selected, Lago do Italiano (LIT) and Lago do Bicho (LB), situated in the municipality of Bonfim in the state of Roraima, Brazil. The lakes differ in hydrological regime, depth, and vegetation. The methodology involved bibliographical and remote sensor data and field surveys followed by laboratory processing. The results revealed that the lakes are composed of sandy materials, with layers what reach 95% of sand. The grains is medium to fine texture, with morphology angular (0 a 50%) and subangular (18% a 43%) grains, disposed at different depths. The grains’ morphology suggests that their sediment provider source is near and, at the same time, indicates a low energy environment. Concerning the mineralogical attributes, the sediments are of a quartzose nature, which permits their correlation with the arenites of the Boa Vista Formation, a sub-cropping unit. The sediment input is controlled by the seasonal oscillation of the groundwater level and inundation pulses that reach the fluviolacustrine plain of the Tacutu River in which the lakes are inserted.https://ges.rgo.ru/jour/article/view/2607aquatic ecosystemhydrological regimesediment provenanceamazonian lakes |
| spellingShingle | Raquel A. Alves Luiza C. Beserra Neta Sediment Dynamics In Lacustrine Environments — Northern Amazon Geography, Environment, Sustainability aquatic ecosystem hydrological regime sediment provenance amazonian lakes |
| title | Sediment Dynamics In Lacustrine Environments — Northern Amazon |
| title_full | Sediment Dynamics In Lacustrine Environments — Northern Amazon |
| title_fullStr | Sediment Dynamics In Lacustrine Environments — Northern Amazon |
| title_full_unstemmed | Sediment Dynamics In Lacustrine Environments — Northern Amazon |
| title_short | Sediment Dynamics In Lacustrine Environments — Northern Amazon |
| title_sort | sediment dynamics in lacustrine environments northern amazon |
| topic | aquatic ecosystem hydrological regime sediment provenance amazonian lakes |
| url | https://ges.rgo.ru/jour/article/view/2607 |
| work_keys_str_mv | AT raquelaalves sedimentdynamicsinlacustrineenvironmentsnorthernamazon AT luizacbeserraneta sedimentdynamicsinlacustrineenvironmentsnorthernamazon |