Monitoring of drought large Caron basin by using SPI index (1978-2014)
Author(s):
Abstract:
Drought monitoring of the Great Karoon basin by using SPI index (1978-2014) Abstract One of the main features of Iran's climate is low amount of precipitation and high fluctuations in daily, seasonal and annual time scales. Each drought has 4 major characteristics which include continuation, intensity, frequency and coverage. The main objective of this study is to evaluate and zoning the drought characteristics of the Great Karoon basin. In this study, the 28-year SPI drought index was used to analyze the characteristics of drought in 42 stations located inside and outside the basin three time scales of 3, 6 and 12 - months. Continuity and severity of drought were extracted at each time scale then drought maps were plotted in GIS environment. The lowest SPI of -3.29 was observed in Yasouj station at the 12 months scale , and the long lasted drought was observed in Bostan with duration of 61 months. Also the longest of continuity and coverage of drought in each year was determined. Key words: drought, continuation, severity, extent , karoon.
Keywords:
Drought , continuation , severity , EXTENT , Karoon
Language:
Persian
Published:
Nivar, Volume:43 Issue: 104, 2019
Pages:
27 to 40
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