Análise do índice de aridez da bacia hidrográfica do rio Piracuruca, Nordeste do Brasil

Santos, Francílio de Amorim dos; Mendes, Lúcia Maria Silveira; Cruz, Lucia Maria Brito da

doi:10.5007/2177-5230.2018v33n67p181

Cited by 4 publications

(3 citation statements)

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“…Similar results were found by Souza et al (2010), in which the aridity index (AI) showed a statistically significant increase nucleus, at the level of 5% probability, in the Araripina micro region, with an annual maximum increase of around 1.65% in the municipality of Exú, in the state of Pernambuco. Santos et al (2018), analysed data from the Annual Average Precipitation (P), Potential Evapotranspiration (ETP) and Aridity Index (AI) in the Piracuruca River basin (PI/CE). These authors concluded that the highest levels of AI were concentrated in the areas, which registered the smallest precipitation totals and the highest values of ETP.…”

Section: Thornthwaite's Aridity Index (Ai)mentioning

confidence: 99%

Temporal trend of drought and aridity indices in semi-arid pernambucano to determine susceptibility to desertification

Silva

Azevedo

2020

RBRH

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ABSTRACT In semi-arid regions, the use of drought and aridity indices in order to establish diagnoses and prognoses that help in water resources management is crucial, above all, for the evaluation of long-term water availability, and monitoring hydrological extreme events. Therefore, the aim of this study was to evaluate the trends of extreme events to determine susceptibility to desertification in the Brígida river basin, by Drought (RAI, SPI and PDSI) and Aridity (MIA, AI and AIASD) Indices. The results of these indices submitted to statistical analysis (Tukey Test) and to the evaluation of the climate trend (TREND software). The Tukey Test indicated that the PDSI and RAI method are the most suitable for drought analysis, while AI is most appropriate for aridity. The results indicated that regardless of the indices employed, the stations presented significant results in the trend analysis, suggesting intensification of these events over time. Therefore, concluded that drought and aridity indices could help water resources management by managing bodies, indicating the evolution of extreme hydrological phenomena, suggesting the adoption of preventive and mitigating actions regarding the use of water priority. In conclusion, these indices can be used as a tool for indicating areas susceptible to the desertification process.

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Section: Thornthwaite's Aridity Index (Ai)mentioning

confidence: 99%

Temporal trend of drought and aridity indices in semi-arid pernambucano to determine susceptibility to desertification

Silva

Azevedo

2020

RBRH

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“…Among the coastal lagoons in Brazil, Peri Lagoon is the largest freshwater body by surface area on Santa Catarina Island (Santos et al, 1989). Limited environmental studies have been conducted on this lagoon since the 1970s, resulting in significant gaps in our understanding of its functions (Teive et al, 2008).…”

Section: Graphical Abstractmentioning

confidence: 99%

Ichthyoplankton distribution set by different environments shapes in a coastal freshwater lagoon

Lopes,

Reynalte-Tataje,

Nuñer

2024

Acta Limnol. Bras.

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Aim This study aimed to evaluate the spatial and temporal distribution of ichthyoplankton in the Peri Lagoon, a coastal freshwater lagoon in Brazil. Methods Ichthyoplankton samples were collected every two months from June 2008 to April 2010 with 500 µm conical-cylindrical planktonic nets at five sampling stations. Results In total, 181 fish eggs and 1,315 larvae, representing estuarine and freshwater species, were captured. The most representative species were Awaous tajasica, Ctenogobius sp1, and Platanichthys platana. Significant differences were found in temporal egg distribution and larval spatiotemporal distribution (Kruskal-Wallis test, p < 0.05). Eggs were predominantly captured during the autumn, winter, and spring Neotropical seasons. Geospatial analysis demonstrated spatial segregation in the distribution of larval assemblages, with higher abundances in areas adjacent to riparian forests, following stream mouths, and deeper areas with rocky substrates. Conclusions Proximity to streams and areas surrounded by dense forests is crucial for the spawning and development of fish species in the Peri Lagoon. The findings of this study provide valuable insights into the conservation of the ichthyofauna in this unique environment.

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“…This characterization, on the other hand, also needs to account for the remarkable interannual variability of precipitation influenced by teleconnection patterns between large-scale circulation mechanisms and local climatological aspects. It is known, for example, that the El Niño-Southern Oscillation (ENSO) oppositely influences rainfall regime in upper and lower portions of the SFW (Galvíncio and de Sousa, 2002;dos Santos et al, 2011;Souto et al, 2019). Additionally, the sea surface temperature gradient in the Tropical Atlantic Ocean (Atlantic Meridional Mode [AMM]) strongly influences rainfall over a considerable extension of semiarid drylands in Brazil (Andreoli and Kayano, 2006;Cavalcanti, 2012;Marengo et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Long‐term meteorological drought characterization in the São Francisco watershed, Brazil: A climatic water balance approach

Mutti

Dubreuil

Bezerra

et al. 2022

Intl Journal of Climatology

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Partially located in the Brazilian Semiarid region, the São Francisco watershed (SFW) is a strategic hydrological system for power generation, agricultural development and the integration of the national territory. Droughts are recurrent in the Brazilian Semiarid, and climate change projected scenarios indicate their intensification in the SFW, which may compromise the access to its resources.In this context, the objective of this study was to characterize long-term spatial and temporal meteorological drought patterns over the SFW while accounting for its different climates. We used gridded Climate Research Unit Time Series rainfall and potential evapotranspiration (PET) data for the 1942-2019 (78 years) period to retrieve a monthly climatic water balance-based drought index. The climatological aspects of drought incidence in the SFW were assessed through linear trend analysis, the estimation of the relative effects of precipitation and PET trends in drought occurrence, and the identification of the main interannual variability modes controlling the triggering of meteorological drought through wavelet functions. Results showed that water deficit periods are becoming more frequent and intense, affecting larger areas in the middle (tropical climate) and lower (semiarid climate) portions of the SFW. Months with water surplus in these regions are also becoming less frequent. In the upper (humid subtropical climate) SFW, evidences show that water deficit periods are becoming more frequent, with an expansion of areas affected by droughts. In this subregion, increasing PET trends played a more important role than precipitation trends in the propagation of drought. Finally, low-frequency teleconnection mechanisms such as the El Niño-Southern Oscillation were found to drive the occurrence of drought in most of the SFW, while higher frequency oscillations (such as the Atlantic Meridional Mode) play a role in the lower latitudes of the basin. In the upper SFW, results indicated that interannual variability might be driven by oscillations with stronger intraseasonal components.

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Análise do índice de aridez da bacia hidrográfica do rio Piracuruca, Nordeste do Brasil

Cited by 4 publications

References 1 publication

Temporal trend of drought and aridity indices in semi-arid pernambucano to determine susceptibility to desertification

Temporal trend of drought and aridity indices in semi-arid pernambucano to determine susceptibility to desertification

Ichthyoplankton distribution set by different environments shapes in a coastal freshwater lagoon

Long‐term meteorological drought characterization in the São Francisco watershed, Brazil: A climatic water balance approach

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