NDLI: Escalas temporais da variabilidade pluviométrica na bacia hidrográfica do Rio Mundaú

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Escalas temporais da variabilidade pluviométrica na bacia hidrográfica do Rio Mundaú

Content Provider	Semantic Scholar
Author	Silva, Djane Fonseca Da Sousa, Francisco Kayano, Mary Toshie
Copyright Year	2010
Abstract	The Rain Anomaly Index (RAI) and the Wavelet Analysis (WA) were used to study the rainfall variability in different regions of the Mundau river basin. ANA (Water National Agency) monthly rainfall data over the basin (States of Alagoas and Pernambuco) for the period 1955 to 1991 were used. The analysis were performed for three regions of this basin: High Mundau (HM), Medium Mundau (MM) and Low Mundau (LM). Analyses of the RAI annual series show distinct temporal variations among these regions, except for the predominance of dry years during the beginning of the analysis period. Therefore, in some years the large scale phenomena might have the same effect on the three regions of the Mundau basin, and have not on another. For WA and for each region a precipitation index calculated as the average of the normalized anomaly series of the stations was used. The results showed that the rainfall variability is defined by temporal multi-scales localized in certain time intervals. However, the ENSO related interannual variability and the decadal variability influenced the local rainfall variability. From these results, it is aimed that the Mundau river basin would have more information for the management of its water resources and climate monitoring.
Starting Page	324
Ending Page	332
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1590/s0102-77862010000300004
Volume Number	25
Alternate Webpage(s)	http://www.scielo.br/pdf/rbmet/v25n3/a04v25n3.pdf
Alternate Webpage(s)	http://submission.scielo.br/index.php/rbmet/article/download/15291/7504
Alternate Webpage(s)	http://www.rbmet.org.br/port/revista/revista_dl.php?id_arquivo=2575&id_artigo=990
Alternate Webpage(s)	https://doi.org/10.1590/s0102-77862010000300004
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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