Hydrologic Simulation for Water Balance Improvement in an Outcrop Area of the Guarani Aquifer System

Machado, Aline Ribeiro; Wendland, Edson; Krause, Peter

doi:10.1007/s40710-016-0128-4

Cited by 25 publications

(15 citation statements)

References 29 publications

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“…The calibration (June 2008–June 2010) and validation (July 2010–August 2011) processes obtained satisfactory results, as presented in detail by Machado et al. (). In this way, we could gather the pair of rainfall–streamflow time series data for all nested basins from different sources and time periods, as can be seen in Table .…”

Section: Methodssupporting

confidence: 55%

Aquifer Responses to Rainfall through Spectral and Correlation Analysis

Gómez¹,

Melo²,

Rodrigues

et al. 2018

J American Water Resour Assoc

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The response time of hydrological components is an important feature for establishing the connections within a hydrological system and for characterizing it. This study proposes a quantitative and qualitative assessment on the response times of river discharge components, especially the baseflow, regarding the impulse provided by precipitation, using time series analyses of time and frequency domains. To this end, a set of complementary methods including correlation and spectral approaches was used, which are: autocorrelation, cross correlation, continuous wavelet transform, and cross wavelet transform. Such framework was applied in multiple and nested basin scales (53, 1,867, and 3,519 km2), located in the Jacaré‐Guaçu River Basin (Southeastern Brazil). Based on a digital filtering technique, it was found the baseflow contributes more than 80% of the annual streamflow, revealing a major role of the aquifer in regulating the river discharge in all three studied basins. In addition, we found baseflow represents a range of 24%–27% of the annual precipitation. The uniform results are mainly due to the similar physical characteristics found in those areas. Overall, our framework indicates a baseflow response time for a precipitation of approximately two years for the smaller basins and three years for the biggest one. Such results can support the water allocation in conjunctive water management, by providing estimates of future surface water availability.

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Section: Methodssupporting

confidence: 55%

Aquifer Responses to Rainfall through Spectral and Correlation Analysis

Gómez¹,

Melo²,

Rodrigues

et al. 2018

J American Water Resour Assoc

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“…Cerrado biome is considered one of the world's 25 biodiversity hotspots due to its endemic species and the degree of threat to which it is subjected (Myers et al, 2000). In addition, the Cerrado biome comprises significant part of the Guarani aquifer, the main groundwater reserve in South America (Machado et al, 2016). From the Cerrado biome important rivers drain into the Paraná, Tocantins-Araguaia, São Francisco and Amazon rivers basins (Lima, 2011).…”

Section: Introductionmentioning

confidence: 99%

Climate change impacts under representative concentration pathway scenarios on streamflow and droughts of basins in the Brazilian Cerrado biome

Rodrigues

Viola

Alvarenga

et al. 2019

Intl Journal of Climatology

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Brazilian Cerrado biome is the largest and richest tropical savanna in the world. In order to understand the effects of climate changes on the hydrology of the Cerrado basins, this paper investigates the hydrological impacts of climate change throughout the 21st century under different emissions scenarios on the streamflow and on the droughts in the Sono, Manuel Alves da Natividade and Palma basins, located in the Brazilian Cerrado. For this purpose, the SWAT hydrological model driven by the downscaling of the HadGEM2‐ES and MIROC5 global climate models associated with RCP4.5 and RCP8.5 scenarios were used in three time slices (2011–2040, 2041–2070 and 2071–2099). The Standardized Precipitation Index (SPI) and the Standardized Streamflow Index (SSFI) were used to characterize droughts. In general, the results showed that the duration, intensity and frequency of the meteorological and hydrological droughts are expected to increase during the future periods. However, the hydrological droughts are projected to be larger than the meteorological droughts. Reductions in the streamflow are indicated in all future time slices and under both RCPs, especially, during dry periods, which may cause negative impacts in the ecological functions of the Cerrado biome, risk for reduction of the recharge of aquifers and risk for the electric energy production in northern Brazil.

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“…A escolha do domínio computacional para o código numérico simular o comportamento do nível potenciométrico em aquífero freático apontou para a extensão total da Bacia Hidrográficas do Rio Itaqueri, pois a mesma encontra-se inserida numa região de afloramento do Sistema Aquífero Guarani (SAG) [12] e, supostamente, suaságuas subterrâneas apresentam conexões hidrológicas com a Represa do Lobo (Broa) e seus rios principais e afluentes. A figura 1 ilustra a visualização aérea daárea de estudo inserida na região de afloramento do SAG e a sua localização dentro do Estado de São Paulo.…”

Section: Desenvolvimento E Modelo Conceitualunclassified

Geoprocessamento de Bacia Hidrográfica e a Solução Automatizada do Fluxo em Aquífero Freático

Jesus¹,

Santos²,

Wendland³

2018

Proceeding Series of the Brazilian Society of Computational and Applied Mathematics

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Resumo A resolução numérica das equações não lineares do modelo de fluxo deágua subterrânea em aquífero freático ainda apresenta seus desafios conceituais e de modelagem. Neste trabalho, o nível potenciométrico da Bacia do Rio Itaqueri, foi simulado a partir de valores conhecidos de níveis estáticos em poços de monitoramento e da conectividade hidráulica com seus rios, represa e fronteira. Ferramentas de geoprocessamento foram empregadas na definição de malhas computacionais providas de condições iniciais e de contorno para obter uma distribuição inicial do potencial hidráulico da bacia. Esta solução numérica, após aplicação do esquema de iteradas de Picard no problema do fluxo livre com vazão, fornece o comportamento final do nível freático da Bacia do Rio Itaqueri disponibilizando resultados numéricos para visualizadores gráficos.

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Hydrologic Simulation for Water Balance Improvement in an Outcrop Area of the Guarani Aquifer System

Cited by 25 publications

References 29 publications

Aquifer Responses to Rainfall through Spectral and Correlation Analysis

Aquifer Responses to Rainfall through Spectral and Correlation Analysis

Climate change impacts under representative concentration pathway scenarios on streamflow and droughts of basins in the Brazilian Cerrado biome

Geoprocessamento de Bacia Hidrográfica e a Solução Automatizada do Fluxo em Aquífero Freático

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