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The subject of this project is to evaluate precipitation variability, trends and projections due to climate change in north-w estern Bulgaria as part of the changes in the early 21st century in that area. Studies in recent years show a decline of precipitation for the Balkans and Bulgaria in particular. The re duction in rainfall amounts is typical for the last 10 years of the 20th century and continues into the early 21st century. Examination models of the precipitation amount indicate a trend of increasing of th...

Drought issues are discussed: concept, definition and classification of drought as well as drought indices, drought prediction and monito ring. The second part is on the weather network in the country as a tool for drought monitoring.

During the last decades an increase of the number of extreme natural events has been observed all over the world. Drought in Southeastern Europe is among the extreme events, which might have significant negativ e impacts on the socio-economic sectors. Drought in Bulgaria has been in details studied by many researchers, but being a problem of vital importance, is continuously considered with enhanced attention. 50- years time series of precipitation, collected from 20 weather stations located at the Maritsa and Tun...