When every drop counts: Analysis of Droughts in Brazil for the 1901-2013 period
To provide information useful in policy formulation and management of drought impacts in Brazil, in this study, a sequence of drought events based on monthly rainfall of 1901-2013 on ~ 25 km x 25 km grid are derived at 4 timescales that include short-timescales (3-month and 6-month) and medium to lo...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/21690 |
| _version_ | 1848750660796809216 |
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| author | Awange, Joseph Mpelasoka, F. Goncalves, R. |
| author_facet | Awange, Joseph Mpelasoka, F. Goncalves, R. |
| author_sort | Awange, Joseph |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | To provide information useful in policy formulation and management of drought impacts in Brazil, in this study, a sequence of drought events based on monthly rainfall of 1901-2013 on ~ 25 km x 25 km grid are derived at 4 timescales that include short-timescales (3-month and 6-month) and medium to long-timescales (12-month and 24-month). Subsequently, probability of drought occurrences, intensity, duration and areal-extent are calculated. The probabilities of occurrence of severe and extreme droughts at short-timescales are 1 in 12 and 1 in 66 years, respectively, all over the country. At medium to long-timescales, the probability of severe droughts is about 1 in 20 years in northern Brazil, and 1 in 10 years in the south. The probabilities of extreme droughts are 1 in 9 and 1 in 12 years over northern Brazil and in the south, respectively. In general, no evidence of significant (a = 0.05) trend is detected in drought frequency, intensity, and duration over the last 11 decades (since 1901) at all the 4 timescales. The drought areal-extent show increasing trends of 3.4%/decade over Brazil for both 3-month and 6-month timescales. However, the trend increases for the 12-month and 24-month timescales are relatively smaller, i.e., 2.4%/decade and 0.5%/decade, respectively. |
| first_indexed | 2025-11-14T07:40:22Z |
| format | Journal Article |
| id | curtin-20.500.11937-21690 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:40:22Z |
| publishDate | 2016 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-216902018-06-13T07:31:45Z When every drop counts: Analysis of Droughts in Brazil for the 1901-2013 period Awange, Joseph Mpelasoka, F. Goncalves, R. To provide information useful in policy formulation and management of drought impacts in Brazil, in this study, a sequence of drought events based on monthly rainfall of 1901-2013 on ~ 25 km x 25 km grid are derived at 4 timescales that include short-timescales (3-month and 6-month) and medium to long-timescales (12-month and 24-month). Subsequently, probability of drought occurrences, intensity, duration and areal-extent are calculated. The probabilities of occurrence of severe and extreme droughts at short-timescales are 1 in 12 and 1 in 66 years, respectively, all over the country. At medium to long-timescales, the probability of severe droughts is about 1 in 20 years in northern Brazil, and 1 in 10 years in the south. The probabilities of extreme droughts are 1 in 9 and 1 in 12 years over northern Brazil and in the south, respectively. In general, no evidence of significant (a = 0.05) trend is detected in drought frequency, intensity, and duration over the last 11 decades (since 1901) at all the 4 timescales. The drought areal-extent show increasing trends of 3.4%/decade over Brazil for both 3-month and 6-month timescales. However, the trend increases for the 12-month and 24-month timescales are relatively smaller, i.e., 2.4%/decade and 0.5%/decade, respectively. 2016 Journal Article http://hdl.handle.net/20.500.11937/21690 10.1016/j.scitotenv.2016.06.031 Elsevier fulltext |
| spellingShingle | Awange, Joseph Mpelasoka, F. Goncalves, R. When every drop counts: Analysis of Droughts in Brazil for the 1901-2013 period |
| title | When every drop counts: Analysis of Droughts in Brazil for the 1901-2013 period |
| title_full | When every drop counts: Analysis of Droughts in Brazil for the 1901-2013 period |
| title_fullStr | When every drop counts: Analysis of Droughts in Brazil for the 1901-2013 period |
| title_full_unstemmed | When every drop counts: Analysis of Droughts in Brazil for the 1901-2013 period |
| title_short | When every drop counts: Analysis of Droughts in Brazil for the 1901-2013 period |
| title_sort | when every drop counts: analysis of droughts in brazil for the 1901-2013 period |
| url | http://hdl.handle.net/20.500.11937/21690 |