Droughts occur naturally, but climate change has generally accelerated the hydrological
processes to make them set in quicker and become more intense, with many consequences …

In recent years droughts have been occurring frequently, and their impacts are being
aggravated by the rise in water demand and the variability in hydro-meteorological variables …

Forecasted increase drought frequency and severity may drive worldwide declines in forest
productivity. Species‐level responses to a drier world are likely to be influenced by their …

The standardized precipitation evapotranspiration index (SPEI) was developed in 2010 and
has been used in an increasing number of climatology and hydrology studies. The objective …

Drought monitoring and early warning (M & EW) systems are a crucial component of drought
preparedness. M & EW systems typically make use of drought indicators such as the …

The authors propose a new climatic drought index: the standardized precipitation
evapotranspiration index (SPEI). The SPEI is based on precipitation and temperature data …

In this study, the authors investigated an approach to calculate the standardized streamflow
index (SSI), which allows accurate spatial and temporal comparison of the hydrological …

In this study, the authors provide a global assessment of the performance of different drought
indices for monitoring drought impacts on several hydrological, agricultural, and ecological …

In contrast to other natural disasters, droughts may develop gradually and last for extended
periods of time. The World Meteorological Organization advises using the Standardized …

With respect to the necessity of comprehensive studies on drought and also high damages
that caused by drought, this research studied the meteorological and hydrological droughts …