Abstract
Regional Drought can be assessed through various meaningfulprocedures mainly related to the expected consequences. However, a general knowledge of the occurrence of drought, thearea which is affected, its severity and its duration are ofgreat importance for a series of decisions, which may beappropriate for a variety of activities. From the existingsimple and popular indices used for the estimation of drought,the Standardised Precipitation Index, known as SPI, seems to winuniversal applicability. A method based on the estimation of SPIover a geographical area and its use for characterising drought,is presented in this paper. Applications of the method arepresented using a digital terrain model and a simple computercalculating routine. It is shown that the proposed procedurecan be easily applied and can support a Drought Watch System foran area of mesoscale dimensions.
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References
Agnew, C. T.: 2000, 'Using the SPI to Identify Drought', Drought Network News (Newsletter of IDIC and NDMC) Vol. 12, No. 1, pp. 6–12.
Beran, M. and Rodier, J. A.: 1985, 'Hydrological Aspects of Drought', Studies and Reports in Hydrology 39, Unesco-WMO, Paris.
Correia, F. N., Santos, M. A. and Rodrigues, R. R.: 1991, 'Reliability in Regional Drought Studies', in Jacques Ganoulis (ed.), Water Resources Engineering Risk Assessment, NATO ASI Series, Vol. G29, Berlin, pp. 43–62.
Guttman, N. B., Wallis, J. R. and Hosking, J. R. M.: 1992, 'Spatial comparability of the Palmer Drought Severity Index', Water Resour. Bull. 28(6), 1111–1119.
Hayes, M. J.: 1999, 'Drought Indices', NDMC – Drought Happens, Drought Indices, http://enso.unl.edu/ndmc/enigma/indices.htm/, updated 12 October 1999.
Hayes, M. J.: 2000, 'Revisiting the SPI: Clarifying the Process', Drought Network News (Newsletter of IDIC and NDMC), Vol. 12, No. 1, pp. 13–14.
O'Connell, P. E., Beran, M., Gurney, R., Jones, D. and Moore, R.: 1977, 'Methods for Evaluating the U.K. Raingauge Network', Report 40, Institute of Hydrology, Wallingford.
Rossi, G., Benedini, M., Tsakiris, G. and Giakoumakis, S.: 1992, 'On regional drought estimation and analysis', Water Resour. Manage. 6(4), 249–277.
Tate, E. L. and Gustard, A.: 2000, 'Drought Definition: A Hydrological Perspective', in J. V. Voght and F. Somma (eds), Drought and Drought Mitigation in Europe, Kluwer Academic Publishers, Dordrecht, pp. 23–48.
Tsakiris, G.: 1994, 'Drought Effects on Vegetation and Soil Degradation in Mediterranean Countries', Final Report of the EPOC-CT90_0028 Project, EEC.
Tsakiris, G., Cavadias, G., Strangeways, I. and Ritsatakis, Em.: 1997, 'Technico-economic Study of the Restructuring and Modernisation of the Hydrologic Station Network of the Ministry of Environment', Final Report, Ministry of Environment, Greece (in Greek).
Wilhite, D. A., Hayes, M. J. and Svoboda, M. D.: 2000, 'Drought Monitoring and Assessment: Status and Trends in the United States', in J. V. Voght and F. Somma (eds), Drought and Drought Mitigation in Europe, Kluwer Academic Publishers, Dordrecht, pp. 149–160.
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Tsakiris, G., Vangelis, H. Towards a Drought Watch System based on Spatial SPI. Water Resources Management 18, 1–12 (2004). https://doi.org/10.1023/B:WARM.0000015410.47014.a4
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DOI: https://doi.org/10.1023/B:WARM.0000015410.47014.a4