Extreme Hydrologic Events in North Area of Buenos Aires Province (Argentina)

Capriolo, Alberto Daniel; Scarpati, Olga Eugenia

doi:10.5402/2012/415081

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…It is a simple test for trend, and as such, it is not dependent upon the magnitude of data, assumptions of distribution (does not have to have a normal/ bell shape distribution), missing data, or irregularly spaced monitoring periods. It helps assess whether a data series shows a trend at a specified significance level [43]. [44] was also developed by the US Geological Survey (USGS) in the 1980s to analyze trends in surface-water quality throughout the United States.…”

Section: Mann-kendall (Mk) Testmentioning

confidence: 99%

“…e confidence intervals of the median slope were computed at α � 0.05, considering the two-sided confidence interval about the slope estimate. For larger data size, the critical value Z 1 − α/2 from a table of standard normal curve gives the upper and lower ranks of the slopes corresponding to the ends of the confidence interval [2,43,46]. e value of Z at α � 0.05 is 1.96.…”

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confidence: 99%

“…e MAKESENS technique calculates the confidence limits at two dissimilar significance levels: α � 0.01 and α � 0.05 [43].…”

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confidence: 99%

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Trend Analysis of Hydrometeorological Data of Gilgel Gibe Catchment, Ethiopia

Rabba

2022

Advances in Meteorology

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Trend analysis of hydrometeorological data is vital for proper water resources planning and management. This paper examines the trends of the hydrometeorological data in Gilgel Gibe catchment and whether the trends are significant. Daily rainfall, temperature, and streamflow data of the stations in/around (nearby) the catchment (7 stations for rainfall, 4 stations for temperatures, and 6 stations for streamflow) for a period longer than 25 years were collected and then analyzed to detect the variability and the changes in trend. Prior to conducting trend tests, the missed data were filled, and their inconsistencies were also adjusted. The nonparametric Mann-Kendall test along with Sen’s slope technique was employed to detect monotonic trends in the data series. The results showed that, on average, the rainfall exhibits an insignificant increasing tendency. It was also observed that there is, in general, an increasing trend in temperature (both maximum and minimum) in the study area. The analysis of the stream flows indicated that only one station (Bulbul Nr. Serbo) showed a positive slope at a 5% significance level. Two stations (Aweitu Nr. Babu and Gibe Nr. Seka) showed a slightly increasing trend, whereas the remaining 3 stations (Gibe Nr. Assendabo, Aweitu at Jimma, and Kitto Nr. Jimma) indicated an insignificant decreasing trend. The streamflow of the catchment generally shows a tiny decreasing tendency (0.007% per year) at its outlet. However, the results in general specified statistically insignificant trend changes of the hydrometrological data of the study catchment.

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Section: Mann-kendall (Mk) Testmentioning

confidence: 99%

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Trend Analysis of Hydrometeorological Data of Gilgel Gibe Catchment, Ethiopia

Rabba

2022

Advances in Meteorology

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“…For Argentina some related studies have also been pursued, namely the work of Capriolo and Scarpati (2012). Given the soil water balance obtained by the evapotranspiration formula of Penman-Monteith, soil water deficit and surplus were considered as triggers of extreme hydrologic events.…”

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confidence: 99%

Analysis of Temporal Variability of Droughts in Southern Paraguay and Northern Argentina (1961–2011)

Portela¹,

Silva²,

Santos³

et al. 2014

Climate Change Management

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The study presents an analysis of droughts using monthly rainfall data, from January 1961 to December 2011, from 11 rain gauges located in Paraguay and Northern Argentina. The characterization of the drought events used the standardized precipitation index (SPI) applied at different time scales (3, 6, and 12 consecutive months). The temporal variability of the droughts in the study period was analyzed in terms of changes in their frequency-regardless of the severity, has the frequency of droughts increased or decreased?-and in their severity-are we experiencing more severe droughts or not? The results achieved, despite proving the suitability of the approaches applied, did not reveal any trend towards an increase or a decrease either in the frequency of the droughts or in their severity in the studied area.

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Drought analysis in southern Paraguay, Brazil and northern Argentina: regionalization, occurrence rate and rainfall thresholds

et al. 2014

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The objective of the present study is to characterize the drought occurrences in a region comprising Paraguay, southern Brazil and northeastern Argentina. To recognize the drought occurrences the standardized precipitation index at the time-scales of 3 and 6 months was applied to the rainfall records from 1961 to 2011 at 51 rain gauges located in that region. After a drought regionalization using principal component analysis, a new approach, the Kernel occurrence rate estimation method coupled with bootstrap confidence band was used to quantify yearly drought occurrence rates. The study also includes the results of an additional and new approach based on rainfall threshold surfaces aimed at recognizing and monitoring the drought occurrence at the early stages of their development. For both time-scales, the study allowed identification of some spatial homogeneous regions regarding the severe droughts. In some of those regions, trends in the severe drought frequency occurrence were identified. The rainfall threshold surfaces, besides providing an adequate interpretation of the meaning of the standard precipitation index, can be quite easily and reliably utilized to identify the drought episodes.

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Extreme Hydrologic Events in North Area of Buenos Aires Province (Argentina)

Cited by 4 publications

References 12 publications

Trend Analysis of Hydrometeorological Data of Gilgel Gibe Catchment, Ethiopia

Trend Analysis of Hydrometeorological Data of Gilgel Gibe Catchment, Ethiopia

Analysis of Temporal Variability of Droughts in Southern Paraguay and Northern Argentina (1961–2011)

Drought analysis in southern Paraguay, Brazil and northern Argentina: regionalization, occurrence rate and rainfall thresholds

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