Forecasting Palmer Index Using Neural Networks and Climatic Indexes
Publication: Journal of Hydrologic Engineering
Volume 14, Issue 6
Abstract
In recent years, several drought monitoring indexes have found application to describe and compare droughts among different time periods and regions as well as to forecast the evolution of ongoing droughts, in order to select appropriate mitigation measures and policies for water resources management under shortage risk conditions. However, limited efforts have been made to investigate the possibilities of using information conveyed by large-scale climatic indexes to improve the forecasting ability of drought indexes, provided they exert some influence on the climatic variability in a region. The aim of the paper is to develop models for forecasting Palmer Hydrological Drought Index series in Sicily (Italy) based on artificial neural networks, and to extend such models in order to include information from large-scale climatic indexes. First, the influence of North Atlantic Oscillation (NAO) and European Blocking (EB) indexes on Palmer index series, computed on areal monthly precipitation from 1955 until 1999 in Sicily, has been investigated by means of a correlation analysis. Results indicate that NAO and EB series are significantly correlated with Palmer index series for winter and autumn months, with special reference to the last decades. Then, forecasting models based on neural networks have been developed, using different approaches. The comparison between the prediction for winter and autumn months obtained by either including or not including the NAO and EB indexes within the forecasting model indicates some improvements in terms of when NAO and especially EB are considered. A different model behavior has been observed for the spring and summer predictions for which no significant improvements in terms of model predictive capability, due to the introduction of the climatic indexes as input variables, have been observed.
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Acknowledgments
The present research has been developed with the partial financial support of the Italian project MIUR PRIN 2005 “Drought indexes forecasting and definition of water supply systems operating rules.” In particular, the writers acknowledgement Dr. Carlo Cacciamani (ARPA Emilia Romagna) for his contributions and for the information provided about climatic indexes.
References
ASCE Task Committee on Application of Artificial Neural Networks in Hydrology. (2000a). “Artificial neural networks in hydrology. I: Preliminary concepts.” J. Hydrol. Eng., 5(2), 115–123.
ASCE Task Committee on Application of Artificial Neural Networks in Hydrology. (2000b). “Artificial neural networks in hydrology. II: Hydrologic applications.” J. Hydrol. Eng., 5(2), 124–137.
Berry, M. J. A., and Linoff, G. (1997). Data mining techniques, Wiley, New York.
Briffa, K. R., Jones, P. D., and Hulme, M. (1994). “Summer moisture variability across Europe, 1892–1991: An analysis based on the Palmer drought severity index.” J. Climatol., 14(5), 475–506.
Cacciamani, C., Morgillo, A., Marchesi, S., and Pavan, V. (2007). “Monitoring and forecasting drought on a regional scale: Emilia Romagna Region.” Methods and tools for drought analysis and management, G. Rossi et al., eds., Springer, Dordrecht, The Netherlands.
Cancelliere, A., Di Mauro G., Bonaccorso, B., and Rossi, G. (2007). “Drought forecasting using the standardized precipitation index.” Water Resour. Manage., 21(5), 801–819.
Cancelliere, A., Rossi, G., and Ancarani, A. (1996). “Use of Palmer Index as drought indicator in Mediterranean regions.” Proc., Int. Association for Hydraulic Research Congress “From Flood to Drought,” Sun City, South Africa, August 5–7, IAHR, 1–25.
Cordery, I., and McCall, M. (2000). “A model for forecasting drought from teleconnections.” Water Resour. Res., 36(3), 763–768.
Goodess, C. M., and Jones, P. D. (2002). “Links between circulation and changes in the characteristics of Iberian rainfall.” Int. J. Climatol., 22(13), 1593–1615.
Heim, R. R. (2000). “Drought indices: A review.” Drought: A global assessment, D. A. Wilhite, ed., Routledge, London.
Hurrell, J. W. (1995). “Decadal trends in the North Atlantic Oscillation: Regional temperatures and precipitation.” Science, 269(5224), 676–679.
Hurrell, J. W., Kushnir, Y., and Visbeck, M. (2001). “The North Atlantic Oscillation.” Science, 291(5504), 603–605.
Jones, P. D., Jonsson, T., and Wheeler, D. (1997). “Extension of the North Atlanctic Oscillation using early instrumental pressure observations from Gibraltar and southwest Iceland.” Int. J. Climatol., 17(13), 1433–1450.
Karl, T. R. (1986). “The sensitivity of the Palmer drought severity index and Palmer’s Z-index to their calibration coefficients including potential evapotranspiration.” J. Clim. Appl. Meteorol., 25(1), 77–86.
Kim, T., and Valdes, J. B. (2003). “Nonlinear model for drought forecasting based on a conjunction of wavelet transforms and neural networks.” J. Hydrol. Eng., 8(6), 319–328.
Lohani, V. K., and Loganathan, G. V. (1997). “An early warning system for drought management using the Palmer drought index.” J. Am. Water Resour. Assoc., 33(6), 1375–1386.
Lohani, V. K., Loganathan, G. V., and Mostaghimi, S. (1998). “Long-term analysis and short-term forecasting of dry spells by Palmer Drought Severity Index.” Nord. Hydrol., 29(1), 21–40.
Lopez-Moreno, J. I., Begueria, S., Vicente-Serrano, S. M., and Garcia-Ruiz, J. M. (2007). “Influence of the North Atlantic Oscillation on water resources in central Iberia: Precipitation, streamflow anomalies and reservoir management strategies.” Water Resour. Res., 43(9), W09411.
McKee, T. B., Doesken, N. J., and Kleist, J. (1993). “The relationship of drought frequency and duration to time scales.” Proc., 8th Conf. on Applied Climatology, American Meteorol. Soc., Anaheim, Calif., 179–184.
Moreira, E. E., Paulo, A. A., Pereira, L. S., and Mexia, J. T. (2006). “Analysis of SPI drought class transitions using loglinear models.” J. Hydrol., 331(1–2), 349–359.
Nash, J. F., and Sutcliffe, J. (1970) “River flow forecasting through conceptual models. Part 1: A discussion of principles.” J. Hydrol., 10(3), 282–290.
Palmer, W. C. (1965). “Meteorological drought.” Research Paper No. 45, U.S. Weather Bureau, Washington, D.C.
Pavan, V., Molteni, F., and Bankovic, C. (2000a). “Winter variability in the Euro-Atlantic region in observations and in ECMWF seasonal ensemble experiments.” Q. J. R. Meteorol. Soc., 126(567), 2143–2173.
Pavan, V., Tibaldi, S., and Brankovic, C. (2000b). “Seasonal prediction of blocking frequency: Results from winter ensemble experiments.” Q. J. R. Meteorol. Soc., 126(567), 2125–2142.
Qian, B., Corte-Real, J., and Xu, H. (2000). “Is the North Atlantic Oscillation the most important atmospheric pattern for precipitation in Europe?” J. Geophys. Res., 105(D9), 11901–11910.
Quadrelli, R., Lazzeri, M., Cacciamani, C., and Tibaldi, S. (2001a). “Observed winter Alpine precipitation variability and links with large-scale circulation patterns.” Clim. Res., 17, 275–2854.
Quadrelli, R., Pavan, V., and Molteni, F. (2001b). “Wintertime variability of Mediterranean precipitation and its links with large-scale circulation anomalies.” Climate Dyn., 17, 457–466.
Rao, A. R., and Padmanabhan, G. (1984). “Analysis and modelling of Palmer’s drought index series.” J. Hydrol., 68, 211–229.
Rogers, J. C. (1990). “Patterns of low-frequency monthly sea level pressure variability (1899–1989) and associated wave cyclone frequencies.” J. Clim., 3(12), 1364–1379.
Rossi, G. (2000). “Drought mitigation measures: A comprehensive framework.” Drought and drought mitigation in Europe, J. V. Vogt and F. Somma, eds., Kluwer Academic, Dardreecht, The Netherlands, 233–246.
Rossi, G., and Cancelliere, A. (2002) “Early warning of drought: Development of a drought bullettin for Sicily.” Proc., 2nd Int. Conf. on New Trends in Water and Environmental Engineering for Safety and Life: Eco-Compatible Solutions for Aquatic Environments, CSDU, Capri, Italy, 1–12.
Smith, D. I., Hutchinson, M. F., and McArthur, R. J. (1993). “Australian climatic and agricultural drought: Payments and policy.” Drought Network News, 5(3), 11–12.
Swingler, K. (1996). Applying neural networks: A practical guide, Academic, London.
Tibaldi, S., and Molteni, F. (1990). “On the operational predictability of blocking.” Tellus, Ser. A, 42A, 343–365.
Vicente Serrano, S. M. (2005). “El Niño and La Niña influence on drought conditions at different time scales in the Iberian Peninsula.” Water Resour. Res., 41(12), W12415.
Walker, G. T., and Bliss, E. W. (1932). “World weather V.” Mem. R. Meteorol. Soc., 4, 53–84.
Wallace, J. M., and Gutzler, D. S. (1981). “Teleconnections in the geopotential height field during the Northern Hemisphere winter.” Mon. Weather Rev., 109, 784–812.
Wilhite, D. A. (2000) Drought: A global assessment, Vol. 2, Routledge, London.
Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 14 • Issue 6 • June 2009
Pages: 588 - 595
Copyright
© 2009 ASCE.
History
Received: Apr 18, 2008
Accepted: Sep 18, 2008
Published online: Feb 16, 2009
Published in print: Jun 2009
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