International journal of Advanced Biological and Biomedical Research، جلد ۱، شماره ۹، صفحات ۹۸۱-۹۹۲
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عنوان انگلیسی ComparabilityAnalyses of the SPI and RDI Meteorological Drought Indices in South Khorasan Province in Iran
چکیده انگلیسی مقاله Comparability analyses are performed to investigate similarities/differences of the standard precipitation index (SPI) and the reconnaissance drought index (RDI), respectively, utilizing precipitation and ratio of precipitation over potential evapotranspiration (ET0). Data are from six synoptic stations in south Khorasan province in Iran.At the first for calculating SPI, the elevation-precipitation regression of each period was obtained then this relationship was applied on DEM layer using GIS software. The result showed that the most severity droughts occurred in 2008, 2000, 2006 and 2001 respectively. In order to obtain RDI index, we used yearly temperature, precipitation data from the stations and potential evapotranspiration were obtained by Torrentwhite method. The resultshowed that 4 stations classified in extremely and severely classes and there was no medium and small class in 2008. The results of RDI indicate that the frequency of droughts with high severity in this area. The calculation of the standardized RDI seems to be as complicated as the computation of the SPI
کلیدواژه‌های انگلیسی مقاله SPI,RDI,ArcGIS9.3,drought,South Khorasan
نویسندگان مقاله غلامرضا زهتابیان |
professors, faculty of natural resources, university of tehran,karaj, iran
سازمان اصلی تایید شده: دانشگاه تهران (Tehran university)

کامران کریمی |
m.sc. student of deserts region management, faculty of natural resourcesuniversity of tehran, karaj, iran
سازمان اصلی تایید شده: دانشگاه تهران (Tehran university)

سارا نخعی نژادفرد | nakhaee nezhad fard
m.sc. student of deserts region management, faculty of natural resourcesuniversity of tehran, karaj, iran
سازمان اصلی تایید شده: دانشگاه تهران (Tehran university)

مهسا میردشتوان |
m.sc. student of watershed management engineering, faculty of natural resourcesuniversity of tehran, karaj, iran
سازمان اصلی تایید شده: دانشگاه تهران (Tehran university)

حسن خسروی |
assistanceprofessors, faculty of natural resources, university of tehran ,karaj, iran
سازمان اصلی تایید شده: دانشگاه تهران (Tehran university)

نشانی اینترنتی http://www.ijabbr.com/article_7862_4415925a83d14ca9766e6d5e75d2ed4f.pdf
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زبان مقاله منتشر شده en
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