A comprehensive analysis and comparison of SPI and SPEI for spatiotemporal drought evaluation

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dc.contributor.authorAbu Arra, Ahmad
dc.contributor.authorŞişman, Eyüp
dc.date.accessioned2025-07-01T10:24:09Z
dc.date.available2025-07-01T10:24:09Z
dc.date.issued2024
dc.departmentİstanbul Medipol Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, İnşaat Mühendisliği Bölümü
dc.description.abstractAssessing drought is crucial for effective water resources management and the development of mitigation strategies. Drought indices serve as indispensable tools in this evaluation process, and choosing an appropriate index is vital for accurate drought assessment. The characteristics and classification of drought depend entirely on the chosen index. Based on the existing literature, the Standardized Precipitation Index (SPI) and Standardized Precipitation Evapotranspiration Index (SPEI) are the most commonly and widely used indices, and there is a significant need for a comprehensive comparison between SPI and SPEI to understand their differences and implications for drought assessment. This research aims to compare SPI and SPEI based on drought indices, characteristics, and classifications using the innovative drought classification matrix (IDCM) for spatiotemporal drought evaluation, and the comparison process is done for events and monthly scales. Also, it aims to investigate the comparison between SPEI obtained from in situ meteorological stations and from the SPEI database. The application and the comparison are presented for Istanbul city between 1951 and 2020. The results show similar variations and high correlation (more than 0.65) between SPI and SPEI. For drought characteristics, there is no consistent relationship between SPI and SPEI at the drought event scale. The outcomes revealed that approximately 60% of the months exhibit consistent drought classifications between the two indices. Finally, it shows a significant difference between SPEI based on in situ meteorological stations and satellite data. The comparison between SPI and SPEI based on different aspects is necessary and essential for drought studies and water resources management.
dc.identifier.citationAbu Arra, A. ve Şişman, E. (2024). A comprehensive analysis and comparison of SPI and SPEI for spatiotemporal drought evaluation. Environmental Monitoring and Assessment, 196(10). http://dx.doi.org/10.1007/s10661-024-13127-7
dc.identifier.doi10.1007/s10661-024-13127-7
dc.identifier.issn0167-6369
dc.identifier.issn1573-2959
dc.identifier.issue10
dc.identifier.pmid39325243
dc.identifier.scopus2-s2.0-85204882923
dc.identifier.scopusqualityQ2
dc.identifier.urihttp://dx.doi.org/10.1007/s10661-024-13127-7
dc.identifier.urihttps://hdl.handle.net/20.500.12511/12993
dc.identifier.volume196
dc.identifier.wosWOS:001321774000001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.institutionauthorŞişman, Eyüp
dc.institutionauthorid0000-0003-3696-9967
dc.language.isoen
dc.relation.ispartofEnvironmental Monitoring and Assessment
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/embargoedAccess
dc.subjectComparison
dc.subjectDrought Characteristics
dc.subjectDrought Classification
dc.subjectSpatiotemporal Drought
dc.subjectSPEI
dc.subjectSPI
dc.titleA comprehensive analysis and comparison of SPI and SPEI for spatiotemporal drought evaluation
dc.typeArticle

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