Mineralogia e química de solo de várzea e suas susceptibilidades no processo de terras caídas na comunidade do Divino Espírito Santo-AM

Magalhães, Regiane Campos; Gomes, Rosilene Campos Magalhães

doi:10.1590/s1982-45132013000300013

Cited by 8 publications

(8 citation statements)

References 5 publications

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“…The exchangeable Ca 2+ , Mg 2+ and K + contents (Table 2), especially Ca 2+ , was more expressive in floodplain / dry land physiography. Alfaia et al (2007); Magalhães et al (2013) and Campos et al (2013) found similar Ca values in Entisol to those reported in this study, varying from 24.7 to 12.4 cmolc kg -1 . The higher relative contents of Ca found in this environment are favored directly by the richness of the sedimented material and the richness of the material that favors its deposition (Campos et al, 2010).…”

Section: Chemical Attributessupporting

confidence: 88%

“…This high CTC behavior in floodplain environments is mainly due to the qualitie of the waters that flood these areas, since they are muddy waters, originating from Andean sediments, they provide these soils better chemical quality. Campos et al (2010) and Magalhães et al (2013) both studying floodplain environments found high CEC rates in these soils in Amazonian environments.…”

Section: Chemical Attributesmentioning

confidence: 87%

“…Although there was reduction with the depth increase (19.40 to 18.45 g / kg-1). Longo & Espíndola (2000) and Magalhães et al (2013) observed that the occurrence of the most pronounced reduction of the superficial layer to the subsurface is normal or expected, since it is related to the greater surface deposition of vegetal and animal residues, as well as the superficial nature of the roots in the floodplain areas. In relation to the Entisols, Portugal (2009) explains that there is usually a delay in the process of decomposition of organic matter during a period of the year, due to the seasonal floods, justifying the low levels of carbon in depth.…”

Section: Chemical Attributesmentioning

confidence: 99%

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Physical and chemical properties of soils in different physiographic environments in the southern Amazonas region

et al. 2019

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The Amazon region has a great diversity of landscapes such as forests galleries, natural fields ("Cerrados Amazônicos"), dense forest, these environments made possible the formation of a broad class of soils over time. The aim of this study was to evaluate the physical and chemical properties of soils in different physiographic environments in southern Amazonas, Brazil. Three areas of representative physiographies were selected, all of them in natural conditions: natural field / forest and floodplain / dry land transitions, and corrugated relief areas. Soil samples were collected in layers of 0.0 to 0.20 and 0.80-1.0 m. From the samples collected the following physical analyzes were performed: particle size, bulk density, particle density, total porosity and saturated hydraulic conductivity; and chemical: exchangeable calcium, magnesium, aluminum and potassium available, phosphorus, potential acidity, pH and organic carbon. Based on the results of chemical analysis were calculated the sum of bases and base saturation. The results were submitted to multivariate statistics analysis, at the discretion of the principal component analysis (PCA). From the results it is clear that different physiographic environments studied influence the formation of different soil classes, featuring the diversity of Amazonian soils. The PCA allowed the distinction and formation of different similarity groups, thus enabling to relate the physical and chemical properties with the physiographic formation in which they are inserted.

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Section: Chemical Attributessupporting

confidence: 88%

Section: Chemical Attributesmentioning

confidence: 87%

Section: Chemical Attributesmentioning

confidence: 99%

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Physical and chemical properties of soils in different physiographic environments in the southern Amazonas region

et al. 2019

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“…However, there was higher discrepancy between floodplain samples, because, although seasonal flooding occurs regularly in floodplain areas, flooded forests have different hydrochemical and vegetative characteristics (Sioli, 1968), as a result of depositions originating from different regions (Prance et al, 1976). Melo et al (2013), Farjado et al (2009, Magalhães andGomes (2013), andLima et al (2005) analyzed the chemical properties of soils with different plant covers. pH, H 2 O values were 5.…”

Section: Multivariate Exploratory Analysis Of Chemical and Textural P...mentioning

confidence: 99%

Chemical and textural properties of floodplain forest soils in the Eastern Amazon, Brazil

Avner¹,

Diego²,

Iolanda³

et al. 2023

Afr. J. Agric. Res.

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Soils in floodplain ecosystems are sedimentary and subject to removal, transport, and deposition processes caused mainly by the water cycle, contributing to frequent variations in landscape patterns and continuous transformation of the floodplain environment. Given the constant disturbance caused by flood pulse variability, it is difficult to assess soil properties in floodplain ecosystems. Soil samples were collected at a depth of 0 to 0.10 m at floodplain and upland forest sites between Santarém and Gurupá, Pará State, Brazil. Samples were analyzed for pH H 2 O, aluminium, calcium, magnesium, potassium, phosphorus, total organic carbon, boron, zinc, copper, iron, manganese, sand, silt, and clay. Potential and effective cation-exchange capacity, sum of bases, base saturation, aluminum saturation, and organic matter were calculated. Data were subjected to descriptive analysis, analysis of variance, correlation analysis, and hierarchical clustering. Chemical and textural parameters differed significantly between floodplain and upland forest soils. Soil properties were highly heterogeneous. Aluminium and aluminium saturation had the highest coefficients of variation among floodplain samples, whereas pH H 2 O and base saturation had the lowest. It is possible to infer from the results that floodplain forest soils maintain high levels of fertility. However, this environment also shows high acidity and toxic levels of exchangeable aluminium.

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“…This research has as its central premise the fact that the social and economic damages related to such processes (creeps and rotational landslides) are significant in areas adjacent to the water courses of Amazonian cities, and that knowledge regarding the mechanisms and principles that govern them is still incipient (Carvalho et. al., 2009;Labadessa, 2011;Matos & Cursinho, 2012;Pacheco & Brandão, 2012;Magalhães & Gomes, 2013).…”

Section: Introductionmentioning

confidence: 99%

Application of The AHP Method For Prioritizing Actions To Reduce Risk Associated With Gravitational Mass Movements In Areas Along The Margins of Watercourses of The City of Rio Branco, Brazil.

Nascimento

Marques

Simões

2021

Preprint

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Problems related to gravitational mass movements at the margins of water courses are present in different parts of the world, but in the Amazon, whose hydrological regime has unique characteristics, and whose socioeconomic situation may be considered as underdeveloped, such problems come into sharp focus. Rotational landslides and creeps on the ground are present with high frequency and magnitude in several municipalities in the Western Amazon. Such processes act in association and annually cause significant losses and material damage. In this context, this study proposes the structuring of a decision-making process that aims to assist in the indication of critical areas, as well as proposing possible actions to mitigate risks. The criteria and procedures adopted for risk-mapping in a portion of the urban center of Rio Branco-AC are described, herein. Risk was measured, based on the multicriteria analysis of attributes related to the physical, anthropic environment and the characteristics of the processes considered. The Hierarchical Analysis Method (AHP), was the technique adopted to structure the risk assessment model, which was later integrated into the GIS environment, to allow spatial analysis. The results were presented in the form of cartograms, descriptive tables and graphs, and aim to help control the mapped risks.

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Mineralogia e química de solo de várzea e suas susceptibilidades no processo de terras caídas na comunidade do Divino Espírito Santo-AM

Cited by 8 publications

References 5 publications

Physical and chemical properties of soils in different physiographic environments in the southern Amazonas region

Physical and chemical properties of soils in different physiographic environments in the southern Amazonas region

Chemical and textural properties of floodplain forest soils in the Eastern Amazon, Brazil

Application of The AHP Method For Prioritizing Actions To Reduce Risk Associated With Gravitational Mass Movements In Areas Along The Margins of Watercourses of The City of Rio Branco, Brazil.

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