Fabiano Pupim

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Verified

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• Doctor of Geoscience
• Professor in Geomophology at University of São Paulo

The sedimentary record of fluvial systems is known to preserve important archives of the effects of climate change on the landscape over time and space. While temperate and arid (semi-arid) regions are relatively well studied, our understanding of fluvial dynamics in tropical mountainous areas throughout the Quaternary is poorly known. Here, we pro...

Since the 1970s, the intensification of anthropogenic activities in the surrounding plateau has caused changes in surface processes that directly influence the fluvial dynamics of the Pantanal. As a consequence of these changes, the intensification of avulsion processes and increases in the magnitude of floods in the lowlands is observed, causing s...

Spatial arrangement of distinct Amazonian environments through time and its effect on specialized biota remain poorly known, fueling long-lasting debates about drivers of biotic diversification. We address the late Quaternary sediment deposition that assembled the world's largest seasonally flooded ecosystems. Genome sequencing was used to reconstr...

In the Amazonian lowlands, the shift from a large wetland dominated by flooded forests (Varzea) to the modern incised valleys bounded by extensive areas of non-flooded forests (Terra Firme) is considered a key driver of the Amazonian mega-biodiversity. Dating the sedimentary beds covered by Terra Firme forest is crucial to constrain the timing of s...

Land use changes and dam construction impacted sediment yield in worldwide river catchments. It is especially true in central-west Brazil, where most of the main watersheds were deforested and rivers, such as the Cuiabá, were dammed in the last 50 years. Here, we investigated the geomorphological and sedimentary responses of the Cuiabá River to lan...

Poster presented at EGU 2025, section GM5.2 'Geomorphic systems and hazards across time: environmental signals from evolving landscapes to sedimentary records'

The sedimentary record of fluvial systems is crucial for understanding the impact of climate change on landscapes over time. While fluvial dynamics in temperate and arid/semi-arid regions have been well-studied, research on Quaternary fluvial processes in tropical mountainous areas is still limited. This study proposes an evolutionary model for the...

Poster presented at EGU 2025, section CL5.1 – Geochronological tools for environmental reconstruction

Cuestas are one of the most expressive landforms in central and eastern South America, especially at the eastern border of the Paraná Sedimentary Basin, southeast Brazil. Generally, these cuestas comprise a smooth landscape in the backslope, steep slopes in the escarpment front, and piedmont deposits in the foothills. Large pediment surfaces capped...

Depósitos sedimentares continentais são importantes arquivos geológicos que registram mudanças na paisagem ao longo do tempo. Para melhor compreender mudancas pretéritas e suas forçantes, valemos-nos da abordagem do “análogo moderno”. Ou seja, depósitos modernos são investigados pelo emprego de métodos e técnicas robustos, buscando compreender...

The São Francisco River in Northeast Brazil has seen hydrological and morphological changes due to extensive damming and climate change over the past century. In this study, we examine the influence of human activities and natural fluctuations in precipitation on the hydrological patterns of the basin and the morphological responses of the lower co...

Understanding the role of open vegetation, particularly in white-sand ecosystems (WSE) and savannas, is crucial for elucidating their role in Amazonian biotic diversification. These ecosystems predominantly develop on sandy terrains, suggesting that the geological substrate significantly influences the vegetation upon it. Therefore, the interaction...

Quartz optically stimulated luminescence (OSL) sensitivity is varied and related to Earth surface processes and, thus, it has been shown to be a useful tool for appraising sediment recycling and provenance investigations. These investigations are mainly based on OSL data purposely measured for sensitivity calculations. However, it has been recently...

Developing countries usually lack environmental baseline information for territorial decision-making. Geomorphological maps constitute valuable tools for natural resource management due to the landforms permanence and dynamics creating interactions between biotic, abiotic, and anthropic unique characteristics worldwide. In this paper, we present an...

Atividades humanas juntamente com as influências naturais alteram os atributos da morfologia do canal, como a largura, profundidade, sinuosidade e padrão do canal. O conhecimento baseado em causa e efeito sobre a capacidade de resposta morfológica dos canais fluviais às alterações naturais e antropogênicas são importantes para avaliar a influência...

Os sistemas fluviais desempenham papel fundamental nos ciclos biogeoquímicos, funções ecossistêmicas e desenvolvimento econômico e social global. Ainda, os rios são os principais agentes na evolução das paisagens e seus depósitos guardam valiosos registros de condições ambientais passadas e perturbações antropogênicas. Os sistemas fluviais são part...

Dating of sediments in geomorphological units (river terraces, alluvial fans and floodplains) of the foothills of the Eastern Andean Cordillera (Colombia). [PT] Datação de sedimentos em unidades geomorfológicas (terraços fluviais, leques aluviais e planícies de inundação) do sopé da Cordilheira Oriental Andina (Colômbia).

A região semiárida do Nordeste brasileiro foi marcada por processos denudacionais durante o Cenozoico que originaram superfícies geomorfológicas, como a Depressão Sertaneja. No município de Sousa (PB), a Depressão Sertaneja, evidencia a presença de xistos, filitos, gnaisses e migmatitos, expostos em relevo plano sob condições climáticas do tipo Aw,...

Historical and instrumental seismicity records from the Central Andes of northwestern Argentina spanning the last 350 years has been the primary data source to characterize this region's exposure to seismic hazard as "moderate" to "high" (0.18-0.25 PGA). The lack of detailed studies regarding widespread evidence of Quaternary seismogenic deformatio...

Dating of sediments in geomorphological units (river terraces, alluvial fans and floodplains) of the foothills of the Eastern Andean Cordillera (Colombia).

This article aims to refine the description of the artefacts and the geomorphological, geological, pedological and chronological (optically stimulated luminescence (OSL) analyses of sedimentary deposits)characterisation of the Rincão I site (southeastern Brazil) to contribute to the understanding of early human–environment interactions. The archaeo...

Historical and instrumental seismicity records from the Central Andes of north-western Argentina spanning the last ca. 350 years have been the primary data source to characterize this region’s exposure to seismic hazard as “moderate” to “high” (0.18-0.25 PGA). Despite the relevance of the existing dataset in seismic hazard assessments (SHA), we pro...

The special issue “South American rivers and wetlands: Evolution, dynamics, and threats” presents 16 studies covering most South America watersheds and the large wetland (Pantanal). These studies frameworks include the water and sediments supply current and past analysis from several drainage basins, added to climate behavior analysis news methodol...

Eolian systems are sensitive to vegetation and climate changes, but also to the sediment supplied by neighbor depositional systems. This sensitivity is manifested in the alternation between periods of sand dune mobility and stability. In the Xique-Xique eolian system, the largest Quaternary interior dune field in Brazil (~8000 km²), the neighboring...

The estimation of suspended sediment concentration (SSC) by remote sensing is a valuable tool because it allows a systematic monitoring in large watersheds and provides information on variations in SCC and its drivers, such as mining and deforestation. Therefore, this work presents a statistical model for estimating SCC in the Upper Paraguay River...

Geomorphic indices along the Eastern Andean Cordillera (0°-4°N), Colombia, and correlation with river dynamics

The estimation of suspended sediment concentration (SSC) by remote sensing is a valuable tool because it allows a systematic monitoring in large watersheds and provides information on variations in SCC and its drivers, such as mining and deforestation. Therefore, this work presents a statistical model for estimating SCC in the Upper Paraguay River...

A estimativa da concentração de sedimentos em suspensão (CSS) por sensoriamento remoto é uma ferramenta valiosa, pois permite o monitoramento sistemático em grandes bacias hidrográficas e fornece informações sobre variações na CSS e seus propulsores, como mineração e desmatamento. Além disso, devido aos altos custos logísticos e financeiros das med...

As atividades humanas perturbam drasticamente a estrutura e funcionamento dos sistemas fluviais. No Centro- Oeste do Brasil essas perturbações são mais evidentes pelas mudanças no uso e cobertura do solo e instalação de usinas hidrelétricas, que alteram o aporte de sedimentos para os canais. Na Bacia Hidrográfica do Rio Cuiabá (BHRC) tais alteraçõe...

The Amazonia biome hosts upland closed and open vegetation ecosystems, in which the current biogeographical patterns relate to the evolution of the physical landscape. Therefore, understanding the origin and timing of the substrates supporting different ecosystems is indispensable for better comprehension of Amazonian biogeography. Here we used qua...

Using a multimethod approach, including polarized light microscopy (PLM), scanning electron microscopy (SEM) with X-ray energy dispersive spectroscopy (EDS), SEM with mineral liberation analyzer (MLA), X-ray diffraction (XRD), and Raman spectroscopy, we examined sub-recent ferruginous crusts in the Xingu River in the Amazon Basin that have formed s...

Paleofluvial dynamics is crucial to understand the role of rivers as biogeographic boundaries in Amazonia during the Cenozoic, period when the Amazonian biome and drainage system were assembled. In central Amazonia, fluvial deposits of the Alter do Chão, Iranduba and Novo Remanso Formations host supergene iron oxides and record changes in the distr...

The Tatacoa Desert (TD) is a Cenozoic basin between the Central and Eastern Cordilleras in the southern Colombian Andes. Its sparse vegetation and Badlands morphology resemble a semi-arid environment, despite receiving ∼1,300 mm of mean annual precipitation. Based on optically stimulated luminescence dating in two fluvial terraces and drainage morp...

Information on Quaternary landscapes and paleoenvironmental changes in the interior of Brazil are scarce. One of such areas, particularly sensitive to these variations, is the modern tropical Pantanal wetland, whose alluvial deposits record paleoenvironmental and paleoclimatic changes during the late Quaternary. Based on detailed pedological and se...

Studies reporting microplastics (MPs) in freshwater and drinking water environments are quite recent. While in the case of freshwater environments the first consistent results in the form of articles emerged from 2013 on the Scopus platform and have been growing exponentially, in the case of drinking water the first articles were published only in...

Trata-se da proposta preliminar de classificação geomorfológica de rios e do ambiente fluvial construída pelo Grupo de Trabalho Direcionado (GTD) sobre o (sub)sistema fluvial dentro das discussões realizadas pelo Sistema Brasileiro de Classificação de Relevo (SBCR). Esta apresentação foi realizada dentro do II Workshop de Cartografia Geomorfológica...

This study reports on the first investigation into the potential of quartz luminescence dating to establish formation ages of ferruginous duricrust deposits (ironstones) of the Xingu River in Eastern Amazonia, Brazil. The studied ironstones comprise sand and gravel cemented by goethite (FeO(OH)), occurring as sandstones and conglomerates in the riv...

A estimativa da concentração de sedimentos em suspensão (CSS) por sensoriamento remoto é uma ferramenta valiosa, pois auxilia o monitoramento sistemático em grandes bacias hidrográficas e fornece informações sobre as variações de CSS e seus propulsores, como por exemplo, atividades de mineração e desmatamento. Portanto, este trabalho apresenta um m...

Este trabalho apresenta a estimativa da concentração de sedimentos em suspensão (CSS) na Bacia Hidrográfica do Rio Taquari/MS a partir da integração de dados coletados in situ de estações hidrológicas e dados de sensoriamento remoto em uma séria histórica. A estimativa da CSS por sensoriamento remoto é uma ferramenta valiosa, pois facilita o monito...

This article deals with geomorphological, sedimentary, paleopedological, chronological (OSL and 14C) and archaeological records within a segment of the Jacaré-Guaçu River alluvial plain in southeast Brazil, aiming to evaluate climatic, hydrological and landscape transformations over the past 115 ky. The results show alternations between humid and d...

This paper documents the Late-Holocene environmental changes and human presence in the northern Danube delta using a multidisciplinary approach that combines geoscientific data with archaeological findings, historical texts, and maps. It follows the formation and progression of the Chilia distributary and the reconfiguration of socioeconomic activi...

The evolution of fluvial systems has been related to tectonics and climate controls across various spatiotemporal scales. Despite the growing efforts to investigate the effects of those controls in fluvial dynamics, studies in intraplate tropical regions are lacking. Here, we applied geomorphological, sedimentological, and optically stimulated lumi...

O Centro-Oeste brasileiro começou a receber, a partir de 1960, incentivos fiscais aplicados por programas governamentais para a expansão agrícola na região, que se intensificou na década de 1970. As atividades do setor primário geram uma mudança no uso da terra para que sejam implantadas plantações e pastos, o que causam o desmatamento da vegetação...

Ações antropogênicas têm alterado rapidamente a cobertura e uso do solo na região da Bacia do Alto Rio Paraguai (BAP) desde a década de 1970, afetando a produção de sedimentos nas vertentes e impactando diretamente os rios que drenam para a planície do Pantanal. No entanto, estudos que quantifiquem os impactos das atividades antrópicas nos processo...

Large rivers are dynamic systems whose evolution depends on both internal and external forcing, particularly tectonics, sea level, and climate. Associating fluvial responses to a specific driver is a complex task that has been debated for a long time. Thus, rivers that flow exclusively under tectonically stable areas and without direct influence of...

We investigated the optically stimulated luminescence (OSL) and thermoluminescence (TL) characteristics of quartz from sediments and parent rocks across South America. OSL and TL sensitivities were compared with the characteristic dose of dose response curves. Additionally, we estimated electron trap parameters of quartz from sediments with contras...

International Congress held online in 2021. Presentation mode: 2 minutes long video

First described over 120 years ago in Brazil, Amazonian Dark Earths (ADEs) are expanses of dark soil that are exceptionally fertile and contain large quantities of archaeological artefacts. The elevated fertility of the dark and often deep A horizon of ADEs is widely regarded as an outcome of pre-Columbian human influence. Controversially, in their...

Archaeological research provides clear evidence that the widespread formation of Amazonian Dark Earths (ADEs) in tropical lowland South America was concentrated in the Late Holocene, an outcome of sharp demographic growth that peaked towards 1000 BP. In their recent paper, however, Silva et al. propose that the high fertility of ADE is not of anthr...

The Tapajós river is among the largest rivers in the world and has been credited as the main affluent of the lower Amazon River. Geomorphological studies in the Tapajós commonly deal with evolutionary, hydrological, and sedimentological issues. Recently, important advances have been made in understanding the morphology and dynamics in the Tapajós,...

This paper presents the geomorphological mapping at a 1:100,000 scale of fluvial deposits in the middle Tocantins River. The region preserves an important sedimentary archive of environmental changes of the Amazon and Cerrado biomes. Yet, the region is under influence of diverse anthropogenic activities, including planned or operational hydropower...

This paper presents the geomorphological mapping at a 1:100,000 scale of fluvial deposits in the middle Tocantins River. The region preserves an important sedimentary archive of environmental changes of the Amazon and Cerrado biomes. Yet, the region is under influence of diverse anthropogenic activities, including planned or operational hydropower...

The present study examines radiofluorescence (RF) emissions in quartz from parent rocks (ig-neous plutonic and volcanic) and sediments of different provenances, which represent a range of optically stimulated luminescence (OSL) and thermoluminescence (TL) sensitivities observed in nature. OSL and TL (110°C peak) sensitivities of quartz have been su...

The modern Amazonian rainforest has a great fascination and global significance, but our knowledge of past landscape changes is still limited due to sparse data and the lack of radiometric age constrains. Precise dating in records older than the late Pleistocene are difficult to obtain and often regionally confined, therefore biostratigraphic corre...

Os depósitos conglomeráticos situados nos arredores do distrito de Laras, São Paulo, capeiam colinas amplas de topo aplainado com altitudes entre 500 e 570 m. Ocorrem em discordância sobre as formações Piramboia e Teresina da Bacia do Paraná. São constituídos de fácies de ortoconglomerados polimíticos com matriz arenosa, mal selecionada. A análise...

The Paraná River has been extensively studied in terms of hydrological and sedimentological characterization. However, the geological history of its fluvial plain is poorly understood due the lack of geochronological data. Most of the studies are focused in the low and middle reaches, whereas the region upstream of the Porto Primavera dam is an alm...

Late Holocene hydroclimate variations have been extensively recognized in Amazonia, but the effects of such changes on riverine discharge within the Amazon lowlands are still poorly understood. We investigated a sediment core covering circa 4,000 to 300 cal yr BP collected in the lower valley of the Xingu River (Xingu Ria) in an area under the infl...

The Atlantic Ocean coast region of southeast Brazil contains two coast-parallel mountain ranges (the Serra do Mar and Serra da Mantiqueira) generated by tectonic activity pulses tens of millions years after the main continental rift event occurred around 120 Ma. Although the short-term erosion rates for the region are established, the relative impo...

Conhecer e caracterizar a diversidade física natural da planície pantaneira e essencial para compreender as inundações e suas variadas inter-relações com a fauna, a flora e as mudanças promovidas pelo homem.

O conhecimento da evolução geomorfológica da planície fluvial do rio Paraná, no trecho a montante da barragem de Porto Primavera, é ainda precário, visto que a maioria dos trabalhos publicados sobre este curso fluvial teve como foco o trecho a jusante da represa. Desta forma, este artigo fornece informações necessárias para auxiliar na reconstrução...

The Amazon region hosts the world's largest watershed spanning from high elevation Andean terrains to lowland cratonic shield areas in tropical South America. This study explores variations in optically stimulated luminescence (OSL) and infrared stimulated luminescence (IRSL) signals in suspended silt and riverbed sands retrieved from major Amazon...

The Pantanal wetland is a complex landscape with distinct hydrogeomorphic compartments, with singular hydrosedimentary processes. Examining these processes draws great interest in understanding Pantanal dynamics for both the management of the system and the geological record predicted by facies models. Hydrosedimentary data in the Pantanal remain s...

Rivers are immensely important to human activities such as water supply, navigation, energy generation, and agriculture. They are also an important morphodynamic agent of erosion, transport and deposition. Their capacity to transport sediment depends on their hydraulic characteristics and can be predicted by mathematical models. Several mathematica...

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Nhecolândia is a fossil lobe of the Taquari River megafan and a prominent geomorphic subunit of the Pantanal wetlands because of the presence of >10,000 small lakes. We investigated the stratigraphic records of three saline lakes from Nhecolândia to explore their potential as Quaternary hydroclimate archives. Radiocarbon data indicate that accumula...

The Brazilian Pantanal wetlands comprise some of the largest Quaternary megafans in South America. The origin of these megafans has been linked to climate changes during the Late Quaternary. This study focuses on the Cuiabá megafan, the second largest megafan of the Pantanal, which has not been studied from the perspective of its basic geomorpholog...

The Xingu and Tapajós rivers in the eastern Amazon are the largest clearwater systems of the Amazon basin. Both rivers have “fluvial rias” (i.e., lake-like channels) in their downstream reaches as they are naturally impounded by the Amazon mainstem. Fluvial rias are widespread in the Amazon landscape and most of the sedimentary load from the major...

The paleogeography of Amazonia lowlands during the Pleistocene remains hampered by the lack of reliable absolute ages to constrain sediment deposition in the hundred thousand to few million years timescales. Optically stimulated luminescence (OSL) dating applied to quartz has provided important chronological control for late Quaternary sediments, b...

The development of optically stimulated luminescence (OSL) dating of sediments has led to considerable advance in the geochronology of the Quaternary. OSL dating is a well established technique to determine sediment burial ages from tens of years to few hundred thousand years. Recent studies have shown that Quaternary sediments of Brazil are domina...

In spite of its global significance to biodiversity and biogeochemical cycles (e.g., as a methane source and carbon dioxide sink), the Pantanal of western Brazil remains underexplored from the perspective of Quaternary paleoecology, paleogeography, and paleoclimatology. Long in the scientific and cultural shadow cast by the Amazon Basin, recent res...

What is an inlier sedimentary basin? What are the main mechanisms of sedimentary infilling? How do the depositional systems behave? And last, but certainly not the least, what geological events occurred in the last million years and continue to take place in the Pantanal area today? These issues are considered in this chapter, based on available ge...

The Colônia Deep Drilling Project held its first International Continental Scientific Drilling Program (ICDP) workshop in September 2014 at the University of São Paulo (Brazil). Twenty-seven experts from six countries discussed the feasibility and the expectations of a deep drilling in the structure of Colônia located at the southwestern margin of...

The Xingu River is a large clearwater river in eastern Amazonia and its downstream sector, known as the Volta Grande do Xingu ("Xingu Great Bend"), is a unique fluvial landscape that plays an important role in the biodiversity, biogeochemistry and prehistoric and historic peopling of Amazonia. The sedimentary dynamics of the Xingu River in the Volt...

The Pantanal Basin is an active sedimentary basin in central-west Brazil that consists of a complex alluvial systems tract characterized by the interaction between different river systems developed in one of the largest wetlands in the world. The Paraguay River is the trunk river system that drains the water and part of the sediment load received f...

Extensive fish mortality occurs occasionally in the Pantanal wetland and the phenomenon is called dequada by local inhabitants.The phenomenon originates by deterioration water quality in rivers and lakes, and the depletion of dissolved oxygen (DO) is the major indicator. Researches have shown that dequada occurs when DO reaches values lower than 3...

Studies concerning the physiography and function of fl uvial systems have increased both Worldwide and in the large Brazilian fl uvial systems. These areas are difficult to study due to problems concerning accessibility and mobility. Remote sensing and geotechnologies are alternatives to partially overcome those diffi culties. Digital elevation mod...

The Turvo/Grande basin is located in the northwestern portion of the São Paulo State and is composed by 64 municipalities, with a drainage area of 15.925 km2. Total human population accounts for 1,3 millions inhabitants, with 91% located in urban areas. This predominance of urban populations with the low availability of surface water, low rates of...