Análise Do Grau De Erodiblidade E Perdas De Solo Na Bacia Do Rio Capiá Baseado Em Sig E Sensoriamento Remoto

Silva, Richarde Marques da; Paiva, Fernanda Maria de Lima; Santos, Celso Augusto Guimarães

doi:10.26848/rbgf.v2i1.232618

Cited by 8 publications

(8 citation statements)

References 8 publications

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“…The higher values of K are found in the flattest regions of FRW, where there is predominance of Planosols. As adopted by Silva, Paiva and Santos (2009) for a watershed situated between the Brazilian States of Pernambuco and Alagoas, a K value of 0.057 was set to the Planosols in the present study.…”

Section: Cover Management Factor (C)mentioning

confidence: 99%

Assessment of soil loss vulnerability in data-scarce watersheds in southern Brazil

et al. 2018

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Soil erosion is currently one of the main concerns in agriculture, water resources, soil management and natural hazards studies, mainly due to its economic, environmental and human impacts. This concern is accentuated in developing countries where the hydrological monitoring and proper soil surveys are scarce. Therefore, the use of indirect estimates of soil loss by means of empirical equations stands out. In this context, the present study proposed the assessment of the Revised Universal Soil Loss Equation (RUSLE) with the aid of Geographical Information Systems (GIS) and remote sensing for two agricultural watersheds in southern Rio Grande do Sul - Brazil. Among all RUSLE factors, LS showed the closest patterns to the local when compared to the total annual soil loss, thus being a good indicator t of risk areas. The total annual soil loss varied from 0 to more than 100 t ha-1 yr-1, with the vast majority (about 65% of the total area) classified from slight to moderate rates of soil loss. The results estimated according to RUSLE indicated that over 10% of the study area presented very high to extremely high soil loss rates, thus requiring immediate soil conservation practices. The present study stands out as an important scientific and technical support for practitioners and decision-makers, being probably the first of its nature applied to extreme southern Brazil.

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Section: Cover Management Factor (C)mentioning

confidence: 99%

Assessment of soil loss vulnerability in data-scarce watersheds in southern Brazil

et al. 2018

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“…Os valores do fator C foram extraídos segundo Lima (2003) e Silva et al (2009), e atribuídos os seguintes valores: (a) áreas urbanas = 0,00005, (b) corpos hídricos = 0,00, (c) afloramentos rochosos =0,000001, (d) caatinga densa = 0,0346, (e) caatinga rala = 0,0579, (f) pequenos cultivos e algaroba = 0,5 e (g) solo exposto = 1. O fator P foi considerado como 1 constante, pois devido a escala regional da pesquisa ficou difícil especializar as práticas conservacionistas.…”

Section: Methodsunclassified

“…Os resultados obtidos para a bacia do Alto Rio Paraíba estão de acordo com a literatura para ambientes semiáridos brasileiros, como o de Silva et al (2009) avaliando as perdas de solo a partir da aplicação da USLE na bacia hidrográfica do Rio Capiá, tributária do Rio São Francisco, entre os Estados de Alagoas e Pernambuco, estimaram perda anual de solo entre 0 e 40 t/ha.ano para 65% da área da bacia. Lopes et al (2011) que estimaram as perdas de solo para a bacia do rio Varjota, no semiárido cearense, e encontraram 74% da área da bacia com baixa susceptibilidade a erosão.…”

Section: Figura 3 Mapa Das Perdas De Solo Na Bacia Do Alto Rio Paraíbaunclassified

Estimativa De Perdas De Solo Na Bacia Do Alto Rio Paraíba, Região Semiárida Do Estado Da Paraíba

Dornellas¹,

Seabra²,

Xavier³

et al. 2017

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ResumoA bacia do Alto Rio Paraíba é estratégica para a gestão dos recursos hídricos no Estado da Paraíba. Recentemente, a bacia começou a receber águas da transposição do Rio São Francisco, gerando a perenização do rio principal até o Açude Epitácio Pessoa, principal reservatório hídrico da região, que abastece Campina Grande. Contudo, a realização de estudos sobre as perdas de solo na bacia são fundamentais para se analisar o comportamento hidrossedimentológico nesta bacia. Nesse sentido, este estudo tem como objetivo avaliar as perdas de solo e as áreas mais propensas à erosão dos solos na bacia do Alto Rio Paraíba. Para tanto, neste estudo foi utilizada a Universal Soil Loss Equation (USLE), a partir da álgebra de mapas. As estimativas das perdas de solos predominaram entre baixa a moderada (0120 t/ha.ano). Os resultados mostraram que as taxas de perdas de solo estimadas são compatíveis com a literatura para ambientes semiáridos. O fator "uso e cobertura" foi considerado o mais importante no cálculo da USLE para a bacia.Palavras-chave: perdas de solo. USLE. semiárido. ESTIMATED SOIL LOSS IN THE UPPER PARAÍBA RIVER BASIN, SEMIARID OF PARAÍBA STATE AbstractThe Upper Paraíba River basin is strategic for the management of water resources in the Paraíba State. Recently the basin began to receive waters of the transposition of the São Francisco River, generating the perenization of the main

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“…For erodibility, the soil class vector file according to Brasil (1971) was used on the scale of 1:500,000. The soil erodibility factor attributed to the basin was K = 0.046 for the Neossols class according to Silva, Paiva, and Santos (2009). To define the LS factor, the r.watershed algorithm from the Grass provider in QGIS was used.…”

Section: Rusle Applicationmentioning

confidence: 99%

Temporal dynamics of soil susceptibility to erosion in semiarid watersheds

et al. 2021

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The intensification of anthropogenic activities on soils contributes to soil loss through erosion. Moreover, the pattern of soil loss in the Cobra River watershed, located in the semiarid region of Rio Grande do Norte, is related to the history of land use and occupation, mainly from agriculture and the red ceramic industry, as well as the climatic seasonality of the region. Thus, the objective of this work was to identify the pattern of soil loss from the Cobra River microbasin in the state of Rio Grande do Norte. For this, the following analyses were performed: a survey of land use class areas for the years 1987, 1997, 2007 and 2017 as part of the Mapbiomas project; estimation of basin soil loss for these years; and quantification of areas of erosion vulnerability classes for this period. QGIS software was used to treat georeferenced data. According to the results, the land cover classes in the rich Cobra River microbasin fluctuated over time. Potential soil loss from the watershed increased from 1987 to 2017, with an increase of approximately 20 million megagrams of potentially erodible soil. The study of soil loss in a microbasin located in the Brazilian semiarid region should consider the variation in land cover over time, climatic seasonality and anthropic activity. To this end, it is important to use geotechnology and geoprocessing techniques to conduct a more robust spatiotemporal analysis.

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Análise Do Grau De Erodiblidade E Perdas De Solo Na Bacia Do Rio Capiá Baseado Em Sig E Sensoriamento Remoto

Cited by 8 publications

References 8 publications

Assessment of soil loss vulnerability in data-scarce watersheds in southern Brazil

Assessment of soil loss vulnerability in data-scarce watersheds in southern Brazil

Estimativa De Perdas De Solo Na Bacia Do Alto Rio Paraíba, Região Semiárida Do Estado Da Paraíba

Temporal dynamics of soil susceptibility to erosion in semiarid watersheds

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