Análise da erodibilidade de saprolitos de gnaisse

Morais, Fernando de; Bacellar, Luís de Almeida Prado; Sobreira, Frederico Garcia

doi:10.1590/s0100-06832004000600014

Cited by 15 publications

(11 citation statements)

References 3 publications

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“…The characteristic of high erodibility of the C horizon or gneiss-originated soil layer (Morais et al, 2004), together with the soil morphological and topographical characteristics (profile) observed in the studied areas indicate the probable causes for the occurrences of gullies with great area and volume in this region.…”

Section: Resultsmentioning

confidence: 69%

Soil and nutrient losses in erosion gullies at different degrees of restoration

Machado¹,

Resende

Campello

et al. 2010

Rev. Bras. Ciênc. Solo

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SUMMARYThe most advanced stage of water erosion, the gully, represents severe problems in different contexts, both in rural and urban environments. In the search for a stabilization of the process in a viable manner it is of utmost importance to assess the efficiency of evaluation methodologies. For this purpose, the efficiency of low-cost conservation practices were tested for the reduction of soil and nutrient losses caused by erosion from gullies in Pinheiral, state of Rio de Janeiro. The following areas were studied: gully recovered by means of physical and biological strategies; gullies in recovering stage, by means of physical strategies only, and gullies under no restoration treatment.

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Section: Resultsmentioning

confidence: 69%

Soil and nutrient losses in erosion gullies at different degrees of restoration

Machado¹,

Resende

Campello

et al. 2010

Rev. Bras. Ciênc. Solo

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“…Voçorocas constituem o estágio mais avançado dos processos erosivos, ocasionando a perda de solo com consequente prejuízo financeiro, social e ambiental (Morais et al, 2004;Guglieri-Caporal et al, 2011;Tedesco et al, 2014). Nessa situação, a realização de práticas mecânicas torna-se evidente, aumentando os custos de controle.…”

Section: Introductionunclassified

Sobrevivência de espécies nativas em função da calagem em área degradada na bacia do Rio Pandeiros

Alves

Kondo

Ferreira

et al. 2021

RSD

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Objetivou-se avaliar o índice de sobrevivência de espécies nativas do cerrado em função da calagem. O experimento foi realizado em uma microbacia do rio Pandeiros. A área experimental apresentava solo com baixo pH, baixa saturação por bases e fortes sinais de degradação antrópica. Na área de empréstimo à montante de terraços construídos com a finalidade de conter a erosão foi realizado o plantio de espécies florestais nativas pioneiras e não pioneiras, testando a ausência e a presença de calcário dolomítico nas covas de plantio. O plantio foi realizado em duas subáreas dentro da microbacia. Para a subárea 1, as espécies pioneiras testadas foram o Angico Vermelho (Anadenanthera macrocarpa), Aroeira (Lithraea molleoides) e Pau Ferro (Caesalpinia ferrea); já para a subárea 2 as espécies testadas foram: Gonçalo Alves (Astronium fraxinifolium), Carne de Vaca (Clethra scabra) e Farinha Seca (Albizia hasslerii). As espécies secundárias inicial e não-pioneira plantadas entre as espécies pioneiras foram respectivamente o Ipê Amarelo (Tabebuia ocharea) e o Jatobá (Hymenaea courbaril), sendo utilizadas essas espécies para as subáreas. Após 449 dias foi a avaliado o índice de sobrevivência das espécies pioneiras e não pioneiras para as subáreas 1 e 2. De maneira geral não se verificou efeito da calagem na sobrevivência de plantas. Para a subárea 1, a espécie com maior índice de sobrevivência foi o Pau Ferro. Para a subárea 2, a espécie com maior índice de sobrevivência foi o Gonçalo Alves. A subárea 1 apresentou maior índice de sobrevivência de espécies não pioneiras que a subárea 2.

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“…The Mortes River basin is located in areas with a predominance of granitic and gneiss crystalline basement rocks, covered by a thick layer of regolith, which is very susceptible to gully erosion (Morais et al, 2004). A significant portion of the basin is compromised by inadequate agricultural management and by roads improperly constructed, from mining activities with the presence of gullies and rills, which present a greater potential for sediment production (Curi et al, 1994;Sampaio et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Hydrosedimentological modeling in a headwater basin in Southeast Brazil

Mauri

Viola

Norton

et al. 2020

Revista Brasileira De Ciência Do Solo

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Hydrosedimentological modeling is a useful tool to predict the water dynamic in a basin and for water resources management. This study aimed to i) evaluate the ability of Soil and Water Assessment Tool (SWAT) to model sediment load and continuous monthly streamflow in the Mortes River Basin (MRB) in Southeastern Brazil; ii) estimate the sediment yield spatially distributed by sub-basins; iii) estimate the sediment load export to the Funil Hydroelectric Power Plant reservoir (FHPP), located in the MRB outlet. For the sensitivity analysis, calibration, and uncertainty analysis of the model, a semi-automatic calibration in SWAT-CUP version 5.1.6 software with the "Sequential Uncertainty Fitting" algorithm was used. To evaluate the ability of SWAT to reproduce the continuous MRB monthly streamflow and sediment load, statistical indexes, and graphical analyses were used to compare the simulated and observed data. For the sediment evaluation, a spatial and temporal comparison of sediment yield maps was used as well as the sediment yield observed in sub-basins, aiming to identify the areas with a more significant contribution to the sediment generation in the basin. The results demonstrated that SWAT performed satisfactorily in simulating both monthly sediment load and streamflow. For discharge calibration, 99 % of the measured data were bracketed by the 95 % prediction uncertainty (95PPU), and for validation, 97 % of the data were bracketed by the 95PPU, which indicates proper bracketing of the measured data within model prediction uncertainty. Uncertainty analysis indicated that 95PPU could capture 78 % of the sediment loads measured during the calibration and 72 % of the measured data during the validation period at MRB. The hydrologic response unit with pasture and Argissolos (Ultisols), Neossolos Litólicos (Entisols), and Cambissolos (Inceptisols) combined with undulated relief were the main areas responsible for the highest sediment contributions. The sediment load delivered to the reservoir from its filling 2002 to 2015 was estimated in 6,682,704 m 3 (16,706,761 Mg) (density of 2.5-Mg m-3) which value corresponded to 2.6 % of storage capacity (water plus sediment) in 14 years. These results are strategic since to become feasible identifying priority areas for soil and water conservation practices as well as useful information for water resources planning and management in the studied basin.

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Análise da erodibilidade de saprolitos de gnaisse

Cited by 15 publications

References 3 publications

Soil and nutrient losses in erosion gullies at different degrees of restoration

Soil and nutrient losses in erosion gullies at different degrees of restoration

Sobrevivência de espécies nativas em função da calagem em área degradada na bacia do Rio Pandeiros

Hydrosedimentological modeling in a headwater basin in Southeast Brazil

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