Assessment of Meteorological Drought Return Periods Over a Temporal Rainfall Change

Datta, Rajarshi; Pathak, Abhishek A.; Dodamani, B. M.

doi:10.1007/978-981-15-6828-2_42

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…F X (x) and F Y (y) are marginal cumulative distribution functions. To select the best copula function, the higher the MLE logarithm value of a copula function, the more acceptable it is (Tsakiris et al 2016;Datta et al 2021).…”

Section: Parameter Estimation and The Fitness Test For Copula Functionmentioning

confidence: 99%

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Analyzing the duration frequency and severity of drought using copula function in the Yazd city

EskandariPour

Soltaninia

2021

Journal of Water and Climate Change

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Duration and severity are the two main variables used in drought analysis. The copula functions are appropriate for multivariate drought analysis, as it lacks the limitations of the classical multivariate distribution function. This study investigated the bivariate frequency analysis of drought duration and severity of Yazd city in Iran synoptic station during 1953–2013. To this end, first, the drought duration and severity variables were derived from the 6-month Standardized Precipitation Index. Then, considering the distribution functions, the gamma distribution function was selected for analyzing the severity and the exponential distribution function was selected for analyzing the duration and then the Clayton copula function was selected out of the three copula functions as the most appropriate one. After conducting bivariate frequency analysis, the joint seasonal and conjunctive return period and conditional return period curves were plotted. The current study well signified that multivariate analyses could present better interpretations of the reality; for example, as it was identified in conditional return period curves of the drought, for every constant duration, the amount of the return period changed as the severity changed. On the contrary, in analyzing the univariate of duration, no effects of severity were observed.

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Section: Parameter Estimation and The Fitness Test For Copula Functionmentioning

confidence: 99%

“…Also, E(L) is the mean time interval between successive droughts. Equation ( 4) is used to calculate the conjunctive joint return periods (Yang et al 2018;Datta et al 2021).…”

Section: Drought Joint Return Periodsmentioning

confidence: 99%

Analyzing the duration frequency and severity of drought using copula function in the Yazd city

EskandariPour

Soltaninia

2021

Journal of Water and Climate Change

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Evaluation of the Drought Trend Alongside of Change Point: A Study of the Purulia District in West Bengal, India

Raha,

Deb

2023

Curr. World Environ

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Since the drought is a significant issue in India, therefore, the scientists should pay close attention in order to manage it. Purulia District experienced the drought on numerous occasions in the past ten years, but the accurate and definite conclusions have not arrived yet. Hence, the Standardized Precipitation Index (SPI) for the 34 years (1979–2014) was utilised in this research together with the change point to evaluate the annual and seasonal drought in the Purulia District. Theil Sen's slope and the Mann-Kendal (MK) test were both employed to determine the trend and its’ magnitude. A trend-free pre-whitening technique was used to remove the influence of lag-1 correlation data from the series. The 1988-89 was marked as the best probable single change (shift) point in the time series of SPI. By calculating the percentage deviation from the SPI's mean trend, the magnitude of the change was calculated. The percentage change of Sen's slope and MK test was high (+ve) at the eastern parts of Purulia, whereas it was observed as the smallest at the southern parts of the region. Thus, it could be concluded that the drought had begun to spread to the study region's eastern sections after the change point. As Purulia is dependent on agricultural crop production, this research would significantly contribute to agricultural planning following the local level management of crop water and rain-water harvesting. Therefore, this research is extremely important for the drought risk management on a regional scale.

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Assessment of Meteorological Drought Return Periods Over a Temporal Rainfall Change

Cited by 2 publications

References 15 publications

Analyzing the duration frequency and severity of drought using copula function in the Yazd city

Analyzing the duration frequency and severity of drought using copula function in the Yazd city

Evaluation of the Drought Trend Alongside of Change Point: A Study of the Purulia District in West Bengal, India

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