Modelagem de Fluxo e Análise do Potencial Hídrico de Aquífero Aluvial no Semiárido de Pernambuco

Monteiro, Adriano Luiz Normandia; Montenegro, Abelardo Antônio de Assunção; Montenegro, Suzana Maria Gico Lima

doi:10.21168/rbrh.v19n3.p151-163

Cited by 3 publications

(3 citation statements)

References 15 publications

(16 reference statements)

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“…Liang and Zhang (2013) and Monteiro, Montenegro and Montenegro (2014) point out that the variation of the piezometric levels nearby river channel is proportional to the time of recharge and discharge, and that the limit of variation is conditional on the distance from the river. These piezometers are nearby the hillside areas, which have piezometric levels closer to the surface, and are recharged by the slope runoff.…”

Section: Resultsmentioning

confidence: 99%

“…According to estimates made by Monteiro, Montenegro and Montenegro (2014), the maximum average extraction from these wells is 45.16 m 3 day -1…”

Section: Methodsmentioning

confidence: 99%

“…Some wells are also used for public supply, fueling water tanker trucks, with approximately 300 m 3 .day -1 extraction. Such exploitation produces critical groundwater depletion, as modelled by Monteiro, Montenegro and Montenegro (2014).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Temporal dependence of potentiometric levels and groundwater salinity in alluvial aquifer upon rainfall and evapotranspiration

Júnior

Montenegro

2017

RBRH

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Rainfall uncertainty and high evapotranspiration rates in the semiarid regions not only play an important impact on surface water scarcity, but interfere on shallow groundwater quantity and quality. The aim of this study was to apply geostatistical methodology to analyze the time dependence of potentiometric levels and groundwater salinity in an intensively monitored alluvial aquifer upon agroclimatological variables, and thus investigate possible monthly and annual correlations. Statistically stable piezometers were considered for the temporal analysis, representing the mean behavior of the whole aquifer. It has been verified that stable piezometers for groundwater levels exhibited temporal dependence of 7 months, similar to the temporal scale of variation for monthly precipitation and potential evapotranspiration, which is consistent to the resulting crossed-semivariogram. Meanwhile, stable piezometers for electrical conductivity showed high uncertainty on temporal dependence scale, which ranged from 3 to 8 months. Thus, rainfall and evapotranspiration alone did not properly explain the temporal dynamics of groundwater salinity. The produced maps successfully identified the long term time pattern of groundwater variation, constituting an important support for water resources evaluation.Keywords: Shallow aquifer; Geostatistics; Water availability; Communal farming; Semiarid. RESUMOA incerteza das chuvas e as elevadas taxas de evapotranspiração nas regiões semiáridas apresentam não apenas um importante impacto na escassez de água superficial, mas interferem na qualidade e quantidade das águas subterrâneas. O objetivo deste estudo foi analisar a dependência temporal dos níveis potenciométricos e a salinidade das águas subterrâneas em aquífero aluvial intensamente monitorado sobre variáveis agroclimatológicas e assim investigar possíveis correlações mensais e anuais. Foram considerados piezômetros estatisticamente estáveis para a análise temporal, representando o comportamento médio do aquífero. Verificou-se que piezômetros estáveis a níveis exibiram dependência temporal de 7 meses, semelhante à escala temporal de variação para precipitação mensal e evapotranspiração potencial, o que é consistente com o semivariograma cruzado produzido. Entretanto, os piezômetros estáveis para condutividade elétrica apresentaram alta incerteza na escala de dependência temporal, que variou de 3 a 8 meses. Assim, as precipitações e a evapotranspiração isoladamente não explicam a dinâmica temporal da salinidade das águas subterrâneas. Os mapas produzidos identificaram com sucesso o padrão temporal de variação da água subterrânea, constituindo um importante suporte para a avaliação dos recursos hídricos.

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Section: Resultsmentioning

confidence: 99%

“…According to estimates made by Monteiro, Montenegro and Montenegro (2014), the maximum average extraction from these wells is 45.16 m 3 day -1…”

Section: Methodsmentioning

confidence: 99%

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Temporal dependence of potentiometric levels and groundwater salinity in alluvial aquifer upon rainfall and evapotranspiration

Júnior

Montenegro

2017

RBRH

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Alluvial groundwater recharge estimation in semi-arid environment using remotely sensed data

Coelho

Montenegro

Almeida

et al. 2017

Journal of Hydrology

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Limits and conditions for the exploitation of alluvial aquifers in the Brazilian semi-arid region

Alves

Rêgo

Galvão

et al. 2018

RBRH

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Easily exploitable aquifers are formed along river beds in the Brazilian semi-arid region and present characteristics that enable the construction of underground dams. The estimate of the potential effective exploitation of these aquifers must take into account the pumping limits of the wells, the upstream groundwater inflows and the flows to downstream reaches and through the underground dam, whose reduction influences the downstream supply. The current research presents a real case study about an aquifer reach, with underground dam and wells, which was analyzed through computational model. We simulated the groundwater flow patterns according to different exploitation scenarios and found that there should be water extraction limitations to assure the required downstream flows. The limitations can be minimized through appropriate well locations and exploitation regimes, as well as through the implementation of underground dams. The definition of these measures becomes possible through the sound use of computational simulation, but their effective implementation will depend on negotiations among users at the basin scale, so that appropriate water permits can be issued.

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Modelagem de Fluxo e Análise do Potencial Hídrico de Aquífero Aluvial no Semiárido de Pernambuco

Cited by 3 publications

References 15 publications

Temporal dependence of potentiometric levels and groundwater salinity in alluvial aquifer upon rainfall and evapotranspiration

Temporal dependence of potentiometric levels and groundwater salinity in alluvial aquifer upon rainfall and evapotranspiration

Alluvial groundwater recharge estimation in semi-arid environment using remotely sensed data

Limits and conditions for the exploitation of alluvial aquifers in the Brazilian semi-arid region

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