Dinâmica do nível freático e da salinização das águas subterrâneas em áreas irrigadas

Andrade, Eunice Maia de; Aquino, Deodato do Nascimento; Luna, Nayara Rochelli de Sousa; Lopes, Fernando Bezerra; Crisóstomo, Lindbergue de Araújo

doi:10.1590/0034-737x201663050005

Cited by 3 publications

(3 citation statements)

References 21 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…De forma similar aos resultados descritos por Fontes Júnior et al (2012) e Andrade et al (2016), pode ser observado que ascensão do nível do lençol freático, coincidindo com a estação chuvosa, identifica que a precipitação pluviométrica determina a ascensão média do nível do lençol freático. Em seguida, após o término do período chuvoso, ocorre uma redução do nível da água.…”

Section: Resultsunclassified

Análise de não Homogeneidades de Séries de Vazão de Captações de Nascentes na Bacia Hidrográfica do Rio Gramame, PB, Brasil

Martins

Filgueira

Filho

et al. 2020

Rev. Bras. Geog. Fis.

View full text Add to dashboard Cite

A bacia hidrográfica do rio Gramame, no litoral sul paraibano, apresenta diversas nascentes perenes de água com vazões significativas que atendem a comunidades locais para diversos usos. Este trabalho teve como objetivo analisar quatro séries de vazões de captações de nascentes na região sudoeste da bacia e de dados pluviométricos, quanto à sua homogeneidade, entre os anos de 2010 e 2013. A questão motivadora da análise foi a suposta diminuição das vazões de captação das nascentes por consequência da construção de estradas e desmatamentos em áreas do entorno dessas nascentes. Para a análise da homogeneidade das séries, foram empregados testes estatísticos para determinação dos possíveis pontos de ruptura e de verificação da estacionariedade. Foi constatado que houve ruptura em todas as séries de vazões analisadas. Analysis of non-homogeneities of time series of flow in sources in the Gramame River basin, Paraíba State, Brazil A B S T R A C TThe Gramame river basin on the south coast of Paraiba State, has several perennial springs with significant flows that serve local communities for various uses. However, the construction of roads, in areas around the springs, and recent deforestation indicated to have caused the decrease in flows captured from sources in the basin. This work aimed at analyzing four data series of flows captured from sources in the southwestern basin and the rainfall data series searching to verify their homogeneity, between the years 2010 and 2013. To analyze the homogeneity of the series, statistical tests were used to find significant change points and to verify the stationarity. It was found that rupture occurred in all series of flow analyzed.Keywords: flow from springs, hydrometeorological time series, groundwater.

show abstract

Section: Resultsunclassified

Análise de não Homogeneidades de Séries de Vazão de Captações de Nascentes na Bacia Hidrográfica do Rio Gramame, PB, Brasil

Martins

Filgueira

Filho

et al. 2020

Rev. Bras. Geog. Fis.

View full text Add to dashboard Cite

show abstract

“…The use of multivariate analysis techniques to interpret water quality parameters can be used to classify similar groups and to express hydro-chemical responses with similar trends. Among these, clustering allows to classify a set of observation objects into homogeneous classes according to similarities, being used by several researchers from different parts of the world (ANDRADE et al, 2016). According to Nonato et al (2007), the hierarchical grouping technique associates the samples with each other, and produces a dendogram, in which the similar samples are grouped according to the chosen variables.…”

Section: /11mentioning

confidence: 99%

Surface water quality assessment of the main tributaries in the lower São Francisco River, Sergipe

Britto

Vasco

Netto

et al. 2018

RBRH

View full text Add to dashboard Cite

Contamination of water body by diffuse and point sources in springs has caused concerns mainly due to restrictions on its quality. The problem becomes more serious when contamination affects water for human consumption, as occurs in the river São Francisco, which supplies several municipalities of Sergipe. In this sense, the objective of the study was to evaluate water quality in eleven tributaries of the São Francisco river in its low course in the period from 2013 to 2014, in order to subsidize decision making by public management bodies operating in the region. For this purpose, it was used the Water Quality Index (WQI) and the Trophic State Index (TSI), as well the hierarchical grouping techniques associated to the samples to compare the different causes of contamination of each source. The lowest WQI values were observed in the rivers Betume and Jacaré and they were associated with high concentrations of coliforms related to the disposal of domestic effluents from the riverside cities. It was observed a tendency to eutrophication in the Jacaré stream, Santo Antônio, Pilões, Papagaio and Capivara rivers demonstrated by the high TSI in the rainy season. The results of the cluster analysis were close to their Euclidean distance, and showed that there were similarity relationships between the different water sources related to their parameters of water quality. In this piece of work, we also used the Factor Analysis resulted in the selection of five factors of water quality indicators which are mainly related to mineral content, organic matter, surface runoff and the level of pollution. Thus, it is concluded that the water quality of the São Francisco river tributaries is at a strong tendency towards contamination and that its tributaries need a constant monitoring for the environmental management decisions to be the most adequate for the sustainable survival of the riverside communities.

show abstract

“…Among the problems that arise from an excessive application of fertilizers, we can mention contamination of water tables, by which elements are leached to depths below the root system, and may reach water sources and pollute the environment (BORTOLOTTO et al 2013). Among the fertilizers that may cause pollution as a consequence of an inadequate management, we can highlight N fertilizers, with an emphasis on the nitrate ion (NO 3 -) and its action in the contamination of groundwater (ANDRADE et al, 2016), and potassium fertilizers, which may raise the levels of K + in the soil to levels above those required for crops when applied excessively (SILVA et al, 2014). In semi-arid regions, the contamination of groundwater may happen even faster, since the soil of such regions are shallow and groundwater is close to the surface (BADR et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Nitrate and potassium movement in a sandy loam soil cultivated with fertigated grapevine (Vitis vinifera /L.) in the Brazilian semiarid

2018

View full text Add to dashboard Cite

Fertigation can increase the efficiency of fertilizer application and facilitate the nutritional management of a crop. Thus, nitrate and potassium movements in a sandy loam soil were evaluated as function of fertilizer doses during three growing seasons of the grapevine cv. Syrah grafted on Paulsen 1103 rootstock (June to October 2013, February to June 2014, and August to November 2014) in Petrolina, state of Pernambuco, Brazil. Five doses of N (0, 15, 30, 60 and 120 kg ha-1) and five doses of K2O (0, 15, 30, 60 and 120 kg ha-1) were combined in a fractional 52 factorial design, totaling 13 combinations, in a randomized blocks experiment with four replications. The concentrations of nitrate and potassium in the soil solution were determined. Samples were collected by porous cup extractors installed at 0.4 and 0.6 m depths. The movement of these ions was obtained by the product between their concentration in the soil solution and the soil water flux density. The increase in nitrogen fertilization promoted a greater movement of NO3- (62.2 kg ha-1) in the soil. The movement of K+ was also observed in two growing seasons .

show abstract

Dinâmica do nível freático e da salinização das águas subterrâneas em áreas irrigadas

Abstract: Dinâmica do nível freático e da salinização das águas subterrâneas em áreas irrigadas

Cited by 3 publications

References 21 publications

Análise de não Homogeneidades de Séries de Vazão de Captações de Nascentes na Bacia Hidrográfica do Rio Gramame, PB, Brasil

Análise de não Homogeneidades de Séries de Vazão de Captações de Nascentes na Bacia Hidrográfica do Rio Gramame, PB, Brasil

Surface water quality assessment of the main tributaries in the lower São Francisco River, Sergipe

Nitrate and potassium movement in a sandy loam soil cultivated with fertigated grapevine (Vitis vinifera /L.) in the Brazilian semiarid

Contact Info

Product

Resources

About