Estimativa da produção de sedimentos em função da mudança de uso e cobertura do solo

Galharte, Caroline Alves; Villela, João M.; Crestana, Sı́lvio

doi:10.1590/s1415-43662014000200010

Cited by 18 publications

(21 citation statements)

References 17 publications

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“…In the literature, numerous papers describe the role of vegetal cover in controlling soil loss and increasing water availability (PANACHUKI et al, 2011;CARDOSO et al, 2012;DIAS, 2012;GALHARTE et al, 2014;PEREIRA et al, 2014). In this work, however, through hydrological modeling, it was possible simulate the landscape changes recorded over 55 years of occupation and their impacts on the hydrosedimentological dynamic, generating strategic information for the management of the hydrographic basin and for the prioritization of interventions seeking environmental preservation and the sustainability of agricultural activities.…”

Section: Soil Erosion Simulationmentioning

confidence: 99%

Simulation of land use scenarios in the Camboriú River Basin using the SWAT model

Blainski

Acosta²,

Garbossa

et al. 2017

RBRH

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Changes in the Earth's landscape have been the focus of much environmental research. In this context, hydrological models stand out as tools for several assessments. This study aimed to use the Soil and Water Assessment Tool (SWAT) hydrological model to simulate the impact of changes in land use in the Camboriú River Watershed in the years 1957, 1978, and 2012. The results indicated that the SWAT model was efficient in simulating water flow and sediment transport processes. Thus, it was possible to evaluate the impact of different land use scenarios on water and sediment yield in the catchment. The changes in land use caused significant changes in the hydro-sedimentological dynamic. Regarding flow, the effects of land use changes were more pronounced at both ends of the curve representing duration of flow. The worst scenario was identified for the year 2012, which saw the highest peak discharges during flood events and lowest flows during the dry season. Concerning soil erosion, the highest values were identified for sub-basins that were predominantly covered by rice paddies and pastures; this was attributed mainly to surface runoff and changes in land use (represented by C-USLE). Overall, the Camboriú River Basin did not experience severe soil erosion issues; however, it was found that changes in land use related to soil and climate characteristics may increase soil degradation, especially in years with high precipitation levels.Keywords: Land use; Basin; Hydrologic scenarios. RESUMOAs mudanças de paisagem têm sido foco de pesquisas na área ambiental. Nesse contexto, os modelos hidrológicos se destacam como ferramentas para diferentes análises. Nesse trabalho, o objetivo foi utilizar o modelo hidrológico SWAT para simular os impactos das alterações no uso e ocupação das terras da bacia hidrográfica do Rio Camboriú (BHRC) entre os anos de 1957, 1978 e 2012. Os resultados indicaram que SWAT foi eficiente para simulação da vazão e da perda de solo possibilitando a quantificação dos impactos a partir da simulação de cenários. As mudanças na cobertura do solo acarretaram alterações significativas no regime hidrossedimentológico. Para a vazão, os impactos foram maiores nos extremos da curva de permanência. O cenário 2012 se destacou negativamente por apresentar as maiores vazões de pico e as menores vazões em período de estiagem. Para a perda de solo, os maiores valores foram identificados nas sub-bacias com uso predominante para rizicultura e pastagens, o que foi atribuído, fundamentalmente, a alterações da taxa de escoamento superficial e aos fatores relacionados ao uso, manejo do solo e práticas conservacionistas. De maneira geral, a BHRC não apresentou problemas severos de perda de solo, entretanto, as mudanças na paisagem associadas as características edafoclimáticas podem favorecer a degradação do solo, principalmente em anos com elevados volumes de precipitação.Palavras-chave: Uso e ocupação das terras; Bacia hidrográfica; Cenários hidrológicos.RBRH, Porto Alegre, v. 22, e33, 2017Simulation of land use...

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Section: Soil Erosion Simulationmentioning

confidence: 99%

Simulation of land use scenarios in the Camboriú River Basin using the SWAT model

Blainski

Acosta²,

Garbossa

et al. 2017

RBRH

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“…This is a model of water distribution to be coupled to a GIS interface; it considers the spatial variability of physical characteristics within a river basin. Several studies have applied this model to analyze the effects of land use changes on the hydrological flows in river basins (SETEGN et al, 2010;PEREIRA et al, 2014b;GALHARTE et al, 2014;SILVA et al, 2015). Nonetheless, SWAT may be unsuitable for simulations in small basins (KIM & LEE, 2010).…”

Section: Introductionmentioning

confidence: 99%

INFLUENCE OF LAND USE CHANGE ON SEDIMENT YIELD: A CASE STUDY OF THE SUB-MIDDLE OF THE SÃO Francisco River Basin

Silva

Souza

2016

Eng. Agríc.

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ABTSRACT: Erosion risk mapping and assessment are important for planning of natural resource management tool. The objective of this study was to simulate different scenarios of land use in the Sub-Middle of the São Francisco River Basin using the Soil and Water Assessment (SWAT) model to analyze the effects of changes in sediment yield, making comparisons with the present land use classification. The scenario analysis was (i) vegetation type characteristic of the semiarid region, (ii) growing corn and (iii) bare soil. For calibration procedure, the first three years of time series from 1993 to 1994 were validated using data from 1995 to 2004. The SWAT model employs the Modified Universal Soil Loss Equation (MUSLE) to compute soil erosion data. The results of simulations for different land uses allowed the identification of areas with a high potential for erosion by water. The major impact produced by sediment inflow was in the bare soil scenario, corresponding to an increase of 93.7% over the current land use. The landscape management in river basins using SWAT model can help identify areas particularly susceptible to erosion process.

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“…Segundo Macedo Neto et al (2017), a quantidade e presença de partículas de solo suspensas representam a consequência da utilização da terra na bacia hidrográfica. Nas regiões onde a perda do solo ocorre com maior intensidade, é constatada a redução da produtividade agrícola (GALHARTE et al, 2014).…”

Section: Introductionunclassified

Estimativa Da Descarga De Sedimentos Transportados Na Bacia Hidrográfica Do Rio Verruga

Ferraz¹,

Lima²,

Guedes³

et al. 2018

Agrarian

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RESUMOO excesso de sedimentos presentes nos cursos d'água são fontes de sérios problemas envolvendo a qualidade e quantidade de água no rio, causando grandes distúrbios socioambientais. Dessa forma, o estudo e monitoramento hidrossedimentológico é de suma importância para definir medidas de mitigação dos impactos ambientais causados pela perda de solo. Portanto, objetivou-se a aplicação da metodologia indireta para determinação dos sedimentos suspensos através da coleta por integração vertical, o que possibilitou a análise sedimentológica, além da medição da vazão, para incrementação do banco de dados referente à bacia do rio Verruga. Assim, foi possível determinar a descarga sólida durante os meses de monitoramento, bem como estabelecer a curva chave para cálculo da vazão com base na cota da seção estudada. Por fim, foi determinada a concentração de sedimentos suspensos, além da calibração de equações para estimativa de valores futuros de descarga sólida diária. PALAVRAS-CHAVE: Hidrologia, Monitoramento, Sedimentos. ESTIMATION OF DISCHARGE OF SEDIMENTS TRANSPORTED IN THEHYDROGRAPHIC BOWL OF RIO VERRUGA ABSTRACT The excess of sediments present in the water courses are sources of serious problems involving the quality and quantity of water in the river, causing great social and environmental disturbances. Thus, hydrosedimentological study and monitoring is important to define measures to mitigate environmental impacts caused by soil loss. Therefore, the objective was to apply the indirect methodology for the determination of suspended sediments through vertical integration, which allowed the

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Estimativa da produção de sedimentos em função da mudança de uso e cobertura do solo

Cited by 18 publications

References 17 publications

Simulation of land use scenarios in the Camboriú River Basin using the SWAT model

Simulation of land use scenarios in the Camboriú River Basin using the SWAT model

INFLUENCE OF LAND USE CHANGE ON SEDIMENT YIELD: A CASE STUDY OF THE SUB-MIDDLE OF THE SÃO Francisco River Basin

Estimativa Da Descarga De Sedimentos Transportados Na Bacia Hidrográfica Do Rio Verruga

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