Appraisal of Drought Characteristics of Representative Drought Indices using Meteorological Variables
In order to efficiently utilize meteorological drought indices, meteorological variables were compared with drought characteristics from the widely known Standardized Precipitation Index (SPI) and Standardized Precipitation Evapotranspiration Index (SPEI). The results of this study indicate that SPI overestimated drought severity and SPEI overestimated drought frequency and length under the same weather conditions. For droughts of high severity and short duration, the shortage of precipitation was the dominant cause for the occurrence of drought. For investigation on drought duration, it was revealed that precipitation was the dominant variable influencing droughts at short durations. The effect of precipitation on drought decreased at long durations, with the effect of Potential Evapotranspiration (PET) on drought became important. For investigation on drought severity, it was revealed that drought severity was proportional to precipitation in both SPI and SPEI, but other meteorological variables did not have a significant relationship with drought severity. These results mean that the magnitudes of the two drought indices changes in different meteorological regimes and it is possible to contribute to the quantitative decision and the combination of drought indices for meteorological drought.
KeywordsSPI SPEI drought characteristics meteorological variables
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- Allen, R. G., Pereira, L. S., Raes, D., and Smith, M. (1998). Crop evapotranspiration: Guidelines for computing crop water requirements, FAO Irrigation and Drainage Paper No. 56, Food and Agr. Orgn. of the United Nations, Rome.Google Scholar
- Kauffmann, G. J. and Vonck, K. J. (2011). “Frequency and intensity of extreme drought in the Delaware basin, 1600-2002.” Water Resources Research, Vol. 47, No. W05521, DOI: 10.1029/2009WR008821.Google Scholar
- Kim, B. S., Sung, J. H., Kang, H.-S., and Cho, C. H. (2012). “Assessment of drought severity over South Korea using Standardized Precipitation Evapotranspiration Index (SPEI).” Journal of Korea Water Resources Association, Vol. 45, No. 9, pp. 887–900, DOI: 10.3741/JKWRA. 2012.45.9.887.CrossRefGoogle Scholar
- Kim, B. S., Sung, J. H., Lee, B. H., and Kim, D. J. (2013). “Evaluation on the impact of extreme droughts in South Korea using the SPEI and RCP8.5 climate change scenario.” Journal of the Korean Society of Hazard Mitigation, Vol. 13, No. 2, pp. 97–109, DOI: 10.9798/KOSHAM.2013.13.2.097.CrossRefGoogle Scholar
- Kim, S. H. and Chung, E.-S. (2017). “Peak drought index analysis of cheongmicheon watershed using meteorological and hydrological drought index.” Journal of Korea Water Resources Association, Vol. 50, No. 1, pp. 65–73.Google Scholar
- Lorenzo-Lacruz, J., Vincente-Serrano, S. M., Lopez-Moreno, J. I., Begueria, S., Garcia-Ruiz, J. M., and Cuadrat, J. M. (2010). “The impact of droughts and water management on various hydrological systems in the headwaters of the Tagus River (central Spain).” Journal of Hydrology, Vol. 386, No. 1, pp. 13–26, DOI: 10.1016/j.jhydrol. 2010.01.001.CrossRefGoogle Scholar
- McKee, T. B., Doesken, N. J., and Kleist, J. (1993). “The relationship of drought frequency and duration to time scales.” 8th Conference on Applied Climatology, California.Google Scholar
- Tsakiris, G. and Vangelis, H. (2005). “Establishing a drought index incorporating evapotranspiration.” European Water, VolS. 9/10, pp. 3–11.Google Scholar
- Vicente-Serrano, S. M., Schrier, G. V., Begueria, S., Azorin-Molina, C., and Lopez-Moreno, J.-I. (2015). “Contribution of precipitation and reference evapotranspiration to drought indices under different climates.” Journal of Hydrology, Vol. 526, pp. 42–54, DOI: 10.1016/j.jhydrol.2014.11.025.CrossRefGoogle Scholar
- Yevjevich, V. (1967). An objective approach to definitions and investigations of continental hydrologic droughts, Hydrology Paper 23, Colorado State University, Fort Collins.Google Scholar
- Yu, M., Li, Q., Hayes, M. J., Svoboda, M. D., and Heim, R. R. (2014). “Are droughts becoming more frequent or severe in China based on the Standardized Precipitation Evapotranspiration Index: 1951-2010?.” International Journal of Climatology, Vol. 34, No. 3, pp. 545–558, DOI: 10.1002/joc.3701.CrossRefGoogle Scholar