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Water 2016, 8(5), 206; doi:10.3390/w8050206

Hydro-Meteorological Drought Projections into the 21-st Century for Selected Polish Catchments

Institute of Geophysics, Polish Academy of Sciences, Warsaw, 01-452, Poland
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Academic Editor: Athanasios Loukas
Received: 27 January 2016 / Revised: 10 May 2016 / Accepted: 11 May 2016 / Published: 17 May 2016
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Abstract

The nature of drought conditions is estimated using a range of indices describing different aspects of drought events. Three drought indices are evaluated, namely the Standardized Precipitation Index (SPI), Standardized Precipitation Evapotranspiration Index (SPEI) and Standardized Runoff Index (SRI), using observed hydroclimatic data and applying them to hydro-meteorological projections into the 21st century. The first two indices are evaluated using only meteorological variables and from this point of view, are better suited to meteorological drought projections than the third index, SRI, which is based on catchment discharge and represents hydrological drought. We assess information contained in those indices and their suitability to catchment scale climate projection drought assessment in ten selected Polish catchments, representing different hydro-climatic conditions, which are used as a case study. Projections of climatic variables (precipitation and temperature) are obtained from the EURO-CORDEX initiative derived from seven climate models at a grid resolution of 12.5 km for the time period 1971–2100. Future runoff projections for the catchments are obtained using a conceptual rainfall-runoff model (HBV). The results of analyses of indices based on observations in the reference period show consistent estimates for most of the catchments. Hydro-meteorological climate model projections for three periods, including the reference period 1971–2000, and two 30-year periods, near-future 2021–2050 and far-future 2071–2100, are used to estimate changes of future drought conditions in the catchments studied. The results show a substantial variation of temporal drought patterns over the catchments and their dependence on projected precipitation and temperature variables and the type of indices applied. Of the three indices studied, only SPEI projections indicate drier conditions in the catchments in the far-future period. The other two indices, SPI and SRI, indicate wetter climates in the future. View Full-Text
Keywords: SPI; SPEI; SRI; climate change; EURO-CORDEX; drought projection; Poland SPI; SPEI; SRI; climate change; EURO-CORDEX; drought projection; Poland
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Meresa, H.K.; Osuch, M.; Romanowicz, R. Hydro-Meteorological Drought Projections into the 21-st Century for Selected Polish Catchments. Water 2016, 8, 206.

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