Development of an annual drought classification system based on drought severity indexes.

An Acad Bras Cienc 2019 8;91(1):e20180188. Epub 2019 Apr 8.

Instituto Federal de Educação, Ciência e Tecnologia do Espírito Santo, Unidade Colatina, Av. Arino Gomes Leal, 1700, Santa Margarida, 29700-060 Colatina, ES, Brazil.

In order to characterize the occurrence and intensity of droughts in the Doce River Basin, as well as to develop a system for its classification, four different drought indexes were evaluated: Percent of Normal Precipitation (PNP), Deciles Method (DM), Rainfall Anomaly Index (RAI) and Standardized Precipitation Index (SPI). The indices were calculated annually, based on precipitation data from 89 rainfall stations of the Brazilian National Water Agency (ANA). Nine analysis units (AUs) were determined in the basin and the Thiessen Polygons method was used to obtain the average precipitation in the respective drainage areas. The indices were calculated for each AU and then related to the drought intensity classes. An overall classification of the indices was proposed for the drought classification system for a 30-year base period, from 1985 to 2015. The most critical hydrological years of the Doce River Basin in relation to the drought were 1994/1995, 2000/2001 and 2014/2015, the latter being the most critical of the last 30 years. The results show that the annual drought classification system proved to be efficient in the identification of events, allowing to verify that the Doce River Basin presents a severe climatic drought condition, on average, every seven years.

Download full-text PDF

Source
http://dx.doi.org/10.1590/0001-3765201920180188DOI Listing
April 2019
2 Reads

Article Mentions


Provided by Crossref Event Data
datacite
Datacite: Datacite
April 9, 2019, 10:49 pm EST

Publication Analysis

Top Keywords

river basin
12
classification system
12
doce river
12
drought classification
12
indices calculated
8
annual drought
8
drought
8
classification
5
method average
4
areas indices
4
drainage areas
4
precipitation respective
4
average precipitation
4
respective drainage
4
classes classification
4
indices proposed
4
proposed drought
4
classification indices
4
polygons method
4
drought intensity
4

References

(Supplied by CrossRef)

CUNHA RLA et al.
2008
Climatologia da Bacia do Rio Doce e sua relação com a topografia local
CUPOLILLO F et al.
Revista Geografias 2008

GARCIA SR et al.
2006

GIBBS WJ et al.
1967
Apagão cognitivo: a crise energética e sua sociologia
GRÜN R et al.
Dados – Rev Bras Ci Soc 2005
Análise do índice padronizado de precipitação para o estado da Paraíba, Brasil
MACEDO MJH et al.
Ambi-Agua 2010

MARQUES FA et al.
2010

Similar Publications