Spatiotemporal analysis of meteorological drought over Kucuk Menderes River Basin in the Aegean Region of Turkey
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ORIGINAL PAPER
Spatiotemporal analysis of meteorological drought over Kucuk Menderes River Basin in the Aegean Region of Turkey Ebru Eris 1 & Yonca Cavus 2,3 Hulya Boyacioglu 7
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Hafzullah Aksoy 4
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Halil Ibrahim Burgan 5
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Hakan Aksu 6
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Received: 13 July 2020 / Accepted: 13 September 2020 # Springer-Verlag GmbH Austria, part of Springer Nature 2020
Abstract Meteorological drought is analyzed both in time and space by using drought indices based on site-specific precipitation and temperature data. Departure of precipitation from its normal called in this study as the Dimensionless Precipitation Anomaly Index (DPAI) is used at annual scale, while the Standardized Precipitation Index (SPI) using precipitation and the Standardized Precipitation Evapotranspiration Index (SPEI) using precipitation and temperature are considered at monthly time scale. Five meteorological stations over Kucuk Menderes River Basin in the western part of Turkey are selected for the case study. Results are presented in the forms of drought index time series, drought risk graphs, and drought severity maps. The prolonged severe historical dry periods of the river basin are correctly identified by the drought indices. It is seen that simple tools such as the drought indices used in this study based on easily available meteorological data could explain temporal variability at a site or spatial variability over a river basin. They are therefore important not only for the scientific community dealing with drought as a research problem but also for decision-makers, stakeholders, and end-users making practice about the drought through water allocation studies and drought management plans. Keywords Dimensionless Precipitation Anomaly Index . Drought risk . Drought severity map . Standardized Precipitation Evapotranspiration Index . Standardized Precipitation Index
1 Introduction
* Ebru Eris [email protected] 1
Department of Civil Engineering, Ege University, Izmir, Turkey
2
Department of Civil Engineering, Beykent University, Istanbul, Turkey
3
Graduate School of Science, Engineering and Technology, Istanbul Technical University, Istanbul, Turkey
4
Department of Civil Engineering, Istanbul Technical University, Istanbul, Turkey
5
Department of Civil Engineering, Akdeniz University, Antalya, Turkey
6
Department of Meteorological Engineering, Samsun University, Samsun, Turkey
7
Department of Environmental Engineering, Dokuz Eylul University, Izmir, Turkey
Drought is a natural temporary imbalance of water availability. It is a stochastic event which emerges from remarkable deficiency in precipitation. It has an impact on large number of sectors such as irrigation, energy, water supply, ecology, etc. since water is the source of life. The fact that drought affects different sectors makes it hard to point one certain definition for the drought, which is a complicated process due to the great variability of water demand in different regions around the world (Mishra and Singh 2010) and also to region-specific climates. Perhaps,
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