This study assessed the meteorological and hydrological droughts their relationship over 30 years from 1985 to 2015 in largest river basin (Mahaweli River Basin (MRB)) Sri Lanka. Data 14 rainfall, 5 temperature, streamflow stations near MRB were used present study. Universal drought indices including Standardized Precipitation Index (SPI) Precipitation–Evapotranspiration (SPEI) assess droughts....

We present here the first experiments for an integrated system that is under development for drought monitoring and water resources assessment in Tuscany Region in central Italy. The system is based on the cross-evaluation of the Standardized Precipitation Index (SPI), Vegetation Indices from remote sensing (from MODIS and SEVIRIMSG), and outputs from the distributed hydrological model MOBIDIC,...

This study estimates of the impact of climate change on yields for the four most commonly grown crops (millet, maize, sorghum and cassava) in Sub-Saharan Africa (SSA). A panel data approach is used to relate yields to standard weather variables, such as temperature and precipitation, and sophisticated weather measures, such as evapotranspiration and the standardized precipitation index (SPI). T...

Due to the recent appearance of shares socioeconomic pathway (SSP) scenarios, there have been many studies that compare results between Coupled Model Intercomparison Project (CMIP)5 and CMIP6 general circulation models (GCMs). This study attempted project future drought characteristics in Cheongmicheon watershed using SSP2-4.5 Australian Community Climate Earth System Simulator-coupled model (A...

Crop performance in rainfed cropping systems generally is dependent on rainfall amount and distribution. The objective of this study was to analyze the long-term consequences of rainfall expressed as a standardized precipitation index (SPI) and fertilizer nitrogen (N) on yields and risk probabilities of maize in the udic-ustic moisture regimes in the Great Plains in Nebraska. The SPI is a preci...

Based on the Standardized Precipitation Index (SPI) and copula function, this study analyzed meteorological drought in upper Minjiang River basin. The Tyson polygon method is used to divide research area into four regions based stations. monthly precipitation data of stations from 1966 2016 were for calculation SPI. change trend SPI1, SPI3 SPI12 showed historical dry-wet evolution phenomenon sh...

abstract drought is one the most complicated and unknown natural disasters and rainfed agriculture is often the first sector to be affected by drought. in this research, we consider the drought monitoring from both meteorological and agricultural points of view. we have selected standardized precipitation index (spi) among the meteorological indices, with a one month time scale for the synoptic...

Climate change has caused droughts to increase in frequency and severity worldwide, which attracted scientists create drought prediction models mitigate the impacts of droughts. One most important challenges addressing is developing accurate predict their discrete characteristics, i.e., occurrence, duration, severity. The current research examined performance several different machine learning ...