Mapeamento, Erodibilidade E Tolerância De Perda De Solo Na Sub-Bacia Do Ribeirão Das Perobas

Demarchi, Júlio César; Zimback, Célia Regina Lopes

doi:10.17224/energagric.2014v29n2p102-114

Cited by 23 publications

(16 citation statements)

References 5 publications

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“…Nas pastagens da BHRSC, foram identificados dois tipos de solos predominantes, que são: cambissolo háplico e nitossolo vermelho. Ambos possuem valores de erodibilidade (fator K) iguais a, respectivamente, 0,036 (Corrêa, Moraes & Pinto, 2015) e 0,039 (Demarchi & Zimback, 2014). O cambissolo háplico abrange 77,775% das pastagens estudadas, ao passo que o nitossolo vermelho possui 22,225% de ocupação.…”

Section: Resultsunclassified

Susceptibilidade natural à erosão nas áreas de pastagem da sub-bacia hidrográfica do ribeirão Santa Cruz, no município de Muniz Freire (ES)

Fiorese

2021

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Livestock, although it has significant economic relevance, is the cause of several problems related to erosion. This fact becomes even more worrying in the context of a hydrographic basin. Thus, the objective of this work was to assess the natural vulnerability to erosion in the pasture areas of the hydrographic sub-basin of the Santa Cruz stream (HBSCS), in order to support improvements related to soil conservation associated with local economic productivity. The procedures took place with the aid of the ArcGIS® geographic information system. The cartographic databases were the websites of GEOBASES, the National Water Agency and the Jones dos Santos Neves Institute. Initially, HBSCS was delimited to later acquire features (vector files) related to the location of pastures covered by HBSCS. The Universal Soil Loss Equation was used to estimate potential erosion. For this, the following data were obtained: erosivity, erodibility, ramp length and slope. Erosion was mapped, quantified and classified. The natural intensity of erosion ranges from 0 ton/ha.year to 6814 ton/ha.year, with an arithmetic mean of 569.740 ton/ha.year and standard deviation equal to 345.013 ton/ha.year. The class with the highest intensity is “moderate to strong”. However, when combined, the “moderate to strong” and “strong” classes comprise 65.666%. The lower intensity classes, “weak” and “moderate”, together, represent only 33.652%. The values can be attributed, mainly, to the ignorance on the part of the rural producers about the most favorable places for the installation of pastures. Therefore, it is extremely necessary to adopt measures favorable to soil conservation, such as the correct management of livestock, especially in areas with a greater erosive tendency. It is expected that studies with a similar theme will continue, considering, for example, the influence of management on HBSCS erosion.

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Section: Resultsunclassified

Susceptibilidade natural à erosão nas áreas de pastagem da sub-bacia hidrográfica do ribeirão Santa Cruz, no município de Muniz Freire (ES)

Fiorese

2021

RISUS

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“…A fragilidade associada à pedologia indicou que os maiores índices estão localizados nos extremos sul e norte da área de estudo, a qual, por sua vez, estão associados aos Cambissolos eutróficos, e Solos Glei distróficos, Litólicos eutróficos e Podzólicos Amarelos distróficos. Esses solos apresentam textura variando entre arenosa e ligeiramente pedregosa, que atribuem maior erodibilidade natural do solo (Demarchi & Zimback, 2014), o que contribui para que eles obtenham os maiores índices de fragilidade. Por outro lado, os solos bem drenados e profundos, com texturas médias e argilosas normalmente são menos propícios a erosão (Bertoni & Lombardi Neto, 2008).…”

Section: Discussionunclassified

Mapeamento da fragilidade ambiental na bacia hidrográfica do rio Candeias, RO

Silva

Duarte

Gato

et al. 2020

J. Env. Anal. Progr.

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O conhecimento da fragilidade ambiental de uma área constitui-se como um excelente instrumento no planejamento das ações sobre o meio ambiente, identificando os pontos vulneráveis que merecem atenção, e as áreas com potencial de ocupação, podendo subsidiar o ordenamento de forma adequada em uma área. O estudo avaliou a fragilidade ambiental da bacia hidrográfica do rio Candeias - RO, a partir da associação entre atributos naturais (declividade, pedológica e erosividade) e ação antrópica (uso e ocupação do solo), para isso, foram utilizados dados de sensoriamento remoto e técnicas de SIG para construção das classes de fragilidade. Os resultados indicam que mais de 60% da área da bacia possui fragilidade ambiental considerada média, tanto potencial quanto emergente. A comparação entre a fragilidade potencial e emergente possibilitou observar a importância do uso do solo de forma adequada, uma vez que a adoção de práticas agrícolas adequadas contribuiu para a redução da fragilidade potencial na área.

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“…The method for evaluating a mean K for each soil type and subtype has been presented in Valle Junior et al (2010a). The method is particularly well described in Demarchi and Zimback (2014), where it can be consulted for details. In short, the values of K were evaluated by an empirical relationship based on multiple regression analysis (Denardin, 1990), which used field measurements of soil erodibility as dependent variable and physic-chemical parameters of soil samples as independent variables:…”

Section: Soil Lossesmentioning

confidence: 99%

A legal framework with scientific basis for applying the ‘polluter pays principle’ to soil conservation in rural watersheds in Brazil

et al. 2017

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The "polluter pays principle" (PPP) has been looked at from the perspective of legal values and technical principles, namely of soil science, to evaluate the acceleration of soil erosion and the consequent development of degraded areas in the Uberaba River basin (area: 2419 km 2), state of Minas Gerais, Brazil. Having accomplished this goal, the study highlights the importance of PPP for the conservation of soil and development of an ecologically equilibrated environment. The diagnosis of degraded areas was based on the coupling of a Geographic Information System with soil loss, land use conflict and tolerance to soil loss models, and revealed a preoccupying situation because an extension of approximately 905 km 2 (1/3 of the basin) has been considered in advanced state of degradation potentially causing environmental damage (e.g., decline of soil fertility and hence crop production, negative impacts of soil particles export on stream and lake water quality and biodiversity of riverine ecosystems). Facing this problem, a legal framework standing on doctrinaire principles, federal laws and the Brazilian Constitution has been proposed whereby the protagonists of soil degradation are called to assume responsibility as well as the costs of repairing this negative condition. Although the study has been carried out on a specific country under pre-defined settings, the rationale behind the proposals can easily be transposed to other scenarios because the scientific methods on which soil degradation has been defined and mapped are generally applicable, while the suggested legal values are currently applied to many regions on the planet.

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Mapeamento, Erodibilidade E Tolerância De Perda De Solo Na Sub-Bacia Do Ribeirão Das Perobas

Cited by 23 publications

References 5 publications

Susceptibilidade natural à erosão nas áreas de pastagem da sub-bacia hidrográfica do ribeirão Santa Cruz, no município de Muniz Freire (ES)

Susceptibilidade natural à erosão nas áreas de pastagem da sub-bacia hidrográfica do ribeirão Santa Cruz, no município de Muniz Freire (ES)

Mapeamento da fragilidade ambiental na bacia hidrográfica do rio Candeias, RO

A legal framework with scientific basis for applying the ‘polluter pays principle’ to soil conservation in rural watersheds in Brazil

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