Inspection the time characteristics of meteorological drought using SPI and SEPI indices in Ardabil province

سبحاني, دکتر بهروز and گلدوست, اکبر (2017) Inspection the time characteristics of meteorological drought using SPI and SEPI indices in Ardabil province. University of Mohaghegh Ardabili, University of Mohaghegh Ardabili.

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Abstract

Drought as a climatic phenomenon affects on all aspects of human activity heavily. However, studies conducted in relation this phenomenon in the proper method is very low. Check the features of drought and recognizing its dimensions can deal and reduce the damage from it is to be effective. In this research to examine the characteristics of long drought for the stations of the province of Ardabil were paid. The data used for this study, the average amount of precipitation and temperature on a monthly basis in the statistical period is 23 years old. Standardized precipitation index (SPI) and stsndardized evaporansprecipitation index (SEPI) on a scale of 1 and 3 months of time to a time of drought characteristics were used. After evaluating the conditions of drought, with each of these indicators, the results of two findings were compared. Based on the results of these discussions it became clear that the process is based on the SPI index utilizing linear and additive SEPI has been in most cases. The most intense drought of Ardebil province based on the SPI index in Ardabil in 3 months time scale in may 1989, with the amount of -2/33, And SEPI index in Pars Abad in February 1999 to the amount of 0.95, at time scale 3-month prespectively. Based on the results of the study if study on precipitation-based drought we just (SPI index), dry conditions in station than it is to other stations, But if the effect of the temperature as well (SEPI index), in the higher temperature to the direction of Pars Abad, increased evaporation and in most cases the severity of drought has been more. Percent occurrence of drought in Khalkhal in SEPI is less than other stations. But the index is higher than that of the other stations the SPI

Item Type: Other
Persian Title: بررسي ويژگي هاي زماني خشکسالي هواشناسي استان اردبيل بر اساس شاخص SPI و SEPI
Persian Abstract: -
Subjects: Research Projects
Divisions: Subjects > Faculty of Literature & Humanities > Department of Geography
Faculty of Literature & Humanities > Department of Geography
Date Deposited: 13 Jul 2019 10:06
Last Modified: 13 Jul 2019 10:06
URI: http://repository.uma.ac.ir/id/eprint/8292

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