WATER FLOW AND STORAGE IN ALLUVIUM AT PERNAMBUCO SEMIARID FOR SUPPLYING SMALL COMMUNITIES

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Wendell José Soares dos Santos
Anderson Luiz Ribeiro de Paiva
Artur Paiva Coutinho
Jaime Joaquim da Silva Pereira Cabral

Abstract

The Northeastern region has a large part of its territory inserted in the semiarid region,
which is characterized by relatively low annual rainfall levels and where the situation
of access to water is aggravated in rural areas with deficient conventional supply. One
of the alternatives for these regions is the use of groundwater, but these springs are
often exploited without knowledge of their behavior. In order to help managers better
understand and manage aquifers, computational models are used, which represent the
situation of the real environment. The present work aimed to evaluate the accumulation
of water in the alluvium in a river stretch in this region, and to develop a numerical model
of underground flow of the porous medium. Infiltration tests were performed with the
Beerkan method at three points in the study area, with collections for granulometric
analysis of the soil, where it was possible to obtain: the granulometric curve, the
hydrodynamic parameters and to build the infiltration, water retention, and hydraulic
conductivity curves. The soil was characterized as predominantly sandy, with infiltration
time varying with the depth, where the average value of hydraulic conductivity and
saturated humidity was 1.84 x 10-4 m/s and 0.44, respectively. The soil presented a low
retention capacity for the tested points. An alluvial model was built using the Visual
Modflow software and the monitoring of water levels was achieved with a satisfactory
numerical model. The results obtained by potentiometric maps of hydraulic heads
adjusted the observations. It was also possible to observe a lowering of the water table,
presenting a critical situation in future scenarios with the prolongation of the drought.

Article Details

How to Cite
Santos, W., Paiva, A., Coutinho, A., & Cabral, J. (2020). WATER FLOW AND STORAGE IN ALLUVIUM AT PERNAMBUCO SEMIARID FOR SUPPLYING SMALL COMMUNITIES. Brazilian Journal of Environmental Sciences (Online), 55(4), 479-497. https://doi.org/10.5327/Z2176-947820200639
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Articles
Author Biographies

Wendell José Soares dos Santos, Universidade Federal de Pernambuco (UFPE)

Doutorando do Programa de Pós-graduação em Engenharia Civil (PPGEC) da Universidade Federal de Pernambuco (UFPE)

Anderson Luiz Ribeiro de Paiva, Universidade Federal de Pernambuco (UFPE)

Doutor em Engenharia Civil, com ênfase em Recursos Hídricos, pela Universidade Federal de Pernambuco (UFPE), em 2009, com período de doutorado sanduíche de um ano na Universidade Livre de Berlim (Freie Universität Berlin), durante o ano de 2006. Mestre em Engenharia Civil, com ênfase em Recursos Hídricos, pela UFPE, em 2004. Graduado em Engenharia Civil pela UFPE em 2002. Atualmente, professor associado do Departamento de Engenharia Civil e Ambiental (DECIV) da UFPE, desde 2010. Atuando na ára de Engenharia Sanitária, com ênfase em Recursos Hídricos, com temáticas principais: salinização de aquíferos costeiros, modelagem de águas subterrâneas, interação rio aquífero, estatística, drenagem urbana.

Artur Paiva Coutinho, Universidade Federal de Pernambuco (UFPE)

Professor Adjunto do Núcleo de Tecnologia (NT) do Centro Acadêmico do Agreste (CAA) da Universidade Federal de Pernambuco (UFPE).

Jaime Joaquim da Silva Pereira Cabral, Universidade Federal de Pernambuco (UFPE)

Professor da Universidade de Pernambuco, membro permanente do Programa de Pós-graduação em Engenharia Civil (PPGEC) da Universidade Federal de Pernambuco (UFPE).