Drought is an unpredictable hydrological phenomenon, and climate change has made it difficult to predict analyze droughts. Nyala city airport metrological station rainfall records from 1943 2017 (75 years) were investigated. Four statistical drought indices used; the standardized precipitation index (SPI), anomaly (RAI), decile percent (RDI), normal (PNI). The study analyzes, assesses, compares...

Drought is one of the most important weather-induced phenomena which may have severe impacts on different areas such as agriculture, economy, energy production, and society. A number of drought indices have been introduced and used in various countries to date. In the current study, four meteorological drought indices including Percent of Normal Precipitation Index (PNPI), Standard Index of Ann...

drought is one of the most important weather-induced phenomena which may have severe impacts on different areas such as agriculture, economy, energy production, and society. a number of drought indices have been introduced and used in various countries to date. in the current study, four meteorological drought indices including percent of normal precipitation index (pnpi), standard index of ann...

In Brazil, the Northeast region, particularly state of Pernambuco, is prone to extreme hydrological events, especially episodes heavy rain and long periods drought. This study examined spatiotemporal variability rainfall in Pernambuco occurrence events. this study, following climate indices were used daily data from historical series 1990 2020: (a) Precipitation Concentration Index (PCI), (b) S...

Drought is an environmental disaster related to the extremes (on a drier side) in hydrometeorology. The precipitation amount modulates drought Nepalese river basins. It vital for efficient water resources management quantify and understand drought. This paper aims characterize droughts Nepal based on standard index (SPI) rainfall anomaly (RAI) using daily data assess their impacts annual crop y...

Here we develop a numerical model to investigate the hypothesis proposed by a companion paper [Eltahir, this issue], which describes a soil moisture–rainfall feedback mechanism. The model is designed to describe the seasonal evolution of the West African monsoon rainfall and is used to perform numerical experiments that elucidate the mechanisms of the response of rainfall to soil moisture anoma...

The occurrence of annual and multiannual droughts in the Brazilian semiarid is a recurrent phenomenon that triggers series consequences, impacting environment quality life population inhabiting this region. Due to its location drought polygon, Immediate Geographical Region Monteiro – PB (REGIM does not diverge from reality. Given above, research aims correlate DM, PNI, RAI Severity Indices Drou...

Abstract As the short- and long-term impacts of climate change are becoming more visible at smaller regional scales, frequent occurrence (absence) erratic precipitation as well water scarcity issues can be identified reliable indicators for predicting meteorological droughts. A supervised declaration drought based on available data requires an understanding reliability consistency indices appro...

Abstract The present study investigates the influence of different atmospheric teleconnections on annual precipitation variability in Northeast Brazil (NEB) based data from Global Precipitation Climatology Center (GPCC) 1901 to 2013. objective this is analyze total NEB for 1901–2013 period, considering physical characteristics four subregions, i.e., Mid-north, Backwoods, Agreste, and Forest zon...

the aim of this research is to analyze the performance of 8 drought’s index in isfahan, kerman and yazd province and choose the best index. for this purpose, used monthly and yearly rainfall data in the period of 30 years (1985-2014) and also used 8 drought indexes in 20 meteorological stations of central iran which the accuracy of each index in determining drought is examined. also zoning in a...