Abstract:A perda de solos depende de fatores naturais e antrópicos com elevada variabilidade espacial e temporal que podem ser inferidos por modelos de predição como a Equação Universal de Perda de Solos Revisada (EUPS-M). Nesse sentido, o objetivo deste trabalho é analisar a distribuição e a variação espaço-temporais das perdas de solo no estado de Goiás para os anos de 1985, 2000 e 2018, a partir da aplicação da EUPS-M, tendo a bacia hidrográfica como unidade de análise multiescalar. Os resultados demonstram que, em … Show more
“…This is probably due to the predominantly flat to gently undulating relief with a dominance of Ferralsols, which prevented any accelerated erosion by water runoff after savanna fires in 1975. In 1975and 1985, anthropogenic activities such as the excavation of surface material for the opening of new roads significantly affected soil losses through water erosion. This is particularly the case for the Acampamento Basin, on the edges of BR-020 road, for the Barrigudo Catchment, along DF-001 road, and along the northern margin of the Torto Watershed (Figure S3.2 in Siame et al, 2023).…”
Section: Anthropogenic Rates Of Erosion Derived From Rusle Modelsmentioning
confidence: 99%
“…In Brazil, there is also a large corpus of studies using the universal soil loss equation (see e.g., Gomes et al., 2019; and references in Rosa et al. (2023)) and experimental runoff plots (e.g., Fonseca et al., 2021). According to Borrelli et al.…”
Section: Brief Review Of Natural Denudation and Human‐induced Erosion...mentioning
Land degradation resulting from increased continental surface erosion is a worldwide and systemic phenomenon due to unsustainable human activities. Already fragile, the intertropical zone is likely to be further affected by climate change like increased aridity, an aggravating factor of soil erosion and land degradation. A major challenge is thus to provide the necessary knowledge to not only deepen our understanding of the Earth's system and its critical thresholds but also to help achieving sustainability. Understanding the factors that control the properties and processes of the critical zone, and especially what will be its responses to ongoing climate and land use changes, requires multidisciplinary efforts to tackle time scales that are compatible with morphogenesis and soil development as well as environmental disturbances of anthropogenic origin. Due to its prominent ecological importance, the Brazilian Cerrado biome is an ideal natural laboratory were to gauge the consequences of recent and intense agricultural activities on continental surface erosion. We focused on the region of Brasília where our approach allows confronting the temporal scales of long‐lived and stable cosmogenic nuclides with that of short‐lived radioactive isotopes, through a comparison of natural and anthropogenically disturbed land surfaces. Our results indicate that long‐term, background denudation rates are lower than 10 mm Kyr−1 whereas recent erosion rates due to human activities may reach rates at least 160 times higher, exceeding by far the sustainability of the soil resource.
“…This is probably due to the predominantly flat to gently undulating relief with a dominance of Ferralsols, which prevented any accelerated erosion by water runoff after savanna fires in 1975. In 1975and 1985, anthropogenic activities such as the excavation of surface material for the opening of new roads significantly affected soil losses through water erosion. This is particularly the case for the Acampamento Basin, on the edges of BR-020 road, for the Barrigudo Catchment, along DF-001 road, and along the northern margin of the Torto Watershed (Figure S3.2 in Siame et al, 2023).…”
Section: Anthropogenic Rates Of Erosion Derived From Rusle Modelsmentioning
confidence: 99%
“…In Brazil, there is also a large corpus of studies using the universal soil loss equation (see e.g., Gomes et al., 2019; and references in Rosa et al. (2023)) and experimental runoff plots (e.g., Fonseca et al., 2021). According to Borrelli et al.…”
Section: Brief Review Of Natural Denudation and Human‐induced Erosion...mentioning
Land degradation resulting from increased continental surface erosion is a worldwide and systemic phenomenon due to unsustainable human activities. Already fragile, the intertropical zone is likely to be further affected by climate change like increased aridity, an aggravating factor of soil erosion and land degradation. A major challenge is thus to provide the necessary knowledge to not only deepen our understanding of the Earth's system and its critical thresholds but also to help achieving sustainability. Understanding the factors that control the properties and processes of the critical zone, and especially what will be its responses to ongoing climate and land use changes, requires multidisciplinary efforts to tackle time scales that are compatible with morphogenesis and soil development as well as environmental disturbances of anthropogenic origin. Due to its prominent ecological importance, the Brazilian Cerrado biome is an ideal natural laboratory were to gauge the consequences of recent and intense agricultural activities on continental surface erosion. We focused on the region of Brasília where our approach allows confronting the temporal scales of long‐lived and stable cosmogenic nuclides with that of short‐lived radioactive isotopes, through a comparison of natural and anthropogenically disturbed land surfaces. Our results indicate that long‐term, background denudation rates are lower than 10 mm Kyr−1 whereas recent erosion rates due to human activities may reach rates at least 160 times higher, exceeding by far the sustainability of the soil resource.
“…Alluvial deposits, composed of sand and gravel, occur in transitioning from these to the lower and flatter parts [27]. In the higher and residual areas, there is a predominance of Plintossols (Petric) with a texture varying from clayey to gravelly, followed, sometimes, by steep segments with the occurrence of Leptsol (Litholic) with sandy to gravelly texture [28,29]. At intermediate altitudes are flatter areas with a predominance of Ferralsol (Red) with a clayey to very clayey texture and, to a lesser extent, Ferralsol (Red-Yellow) with a clayey texture.…”
Section: Location and Characterization Of The Study Areamentioning
confidence: 99%
“…Soil classes, texture, and their correspondence in Hydrological Groups and K factor. Source: adapted by authors from[28,29,[41][42][43].…”
The efficiency and useful life of reservoirs are directly related to the production and input rates of sediments resulting from erosive processes at the edges and those resulting from the action of surface runoff in contribution areas and transported via tributary channels. Knowledge of the intensity, as well as the relationship between generation and input, allows more precise identification of critical environments, helping in the decision-making process and allowing the definition of mitigating measures. This work aims to relate the spatial variability of soil loss with the respective sediment transfer potential in two sub-basins tributary to the HPP Batalha reservoir in the Midwest region of Brazil. The methodology comprised the bivariate analysis between estimates of soil loss in areas of contribution and the Declivity-Extent Relationship along the channels. The results point to the configuration of four spatial patterns, indicating different levels of criticality in terms of sediment generation potential and transport capacity. In addition, they highlight basins with high potential and greater proximity to the reservoir, which constitute priority areas for monitoring, especially the conditions of soil cover and management, to contribute to the reduction of sediment inputs and prolong the efficiency of these structures.
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