ComparabilityAnalyses of the SPI and RDIMeteorological Drought Indices in South Khorasan province in Iran
Journal Title: International journal of Advanced Biological and Biomedical Research - Year 2013, Vol 1, Issue 9
Abstract
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.
Authors and Affiliations
Gholamreza Zehtabian| Professors, Faculty of Natural Resources ,University of Tehran,Karaj, Iran, Kamran Karimi| M.Sc. Student of Deserts Region Management ,Faculty of Natural ResourcesUniversity of Tehran, Karaj, Iran, Sara Nakhaee nezhad fard| M.Sc. Student of Deserts Region Management ,Faculty of Natural ResourcesUniversity of Tehran, Karaj, Iran, E-mail: s_nakhaee@ut.ac.ir, Mahsa Mirdashtvan| M.Sc. Student of Watershed Management engineering, Faculty of Natural ResourcesUniversity of Tehran, Karaj, Iran, Hassan Khosravi| AssistanceProfessors, Faculty of Natural Resources ,University of Tehran ,Karaj, Iran
Keywords
Related Articles
- EP ID EP12882
- DOI -
- Views 365
- Downloads 20
Effect of STAT1 variants on milk production traits in Esfahan Holstein Cows
STATs are a family of latent transcription factors that reside in the cytoplasm of resting cells. The STAT1 transcription factor gene located on the chromosome 2 at interval 60 to 63 cM. This factor upon stimulation wi...
Partial purification and characterisation of polyphenol oxidase from tomatoes (solanum lycopersicum)
Polyphenol oxidase (PPO) from tomatoes was extracted and partially purified through (NH4)2SO4 precipitation, dialysis and ion exchange chromatography. The activity of polyphenol oxidase was investigated in solanum lyco...
Effect of plant density and nitrogen fertilizer on some attribute ofgrain sorghum (sorghum bicolor (l.) moench)
A field experiment was conducted in 2010, to evaluate the effects of plant density (D1, D2 and D3: 8, 14 and 20 plant/m2) on field performance of Sorghum under different nitrogen application rates (N1, N2 and N3: appli...
Effect of FE foliar application on morphological and physiological traits of different dryland wheat cultivars
A Split plot experiment based on randomized complete block design (RCBD) with three replications was conducted in 2012,Treatments were included the time of foliar application with 3 levels (tillering stage, heading sta...
Effect of Sick Building Syndrome on fatigue and runny nose
There have been few longitudinal studies on sick building syndrome (SBS), which include headache, fatigue, and runny nose. We considered effect of sick building syndrome with illnesses like headache, fatigue and runny...