| Analysis of Spatial and Temporal Characteristics of Meteorological Drought in Guanzhong Region of Shaanxi Province |
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| DOI：10.7606/j.issn.1000-7601.2011.02.39 |
| Key Words: meteorological drought SPI spatial and temporal characteristics Guanzhong Region of Shaanxi Province |
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| Abstract: |
| In this paper, SPI(standardized precipitation index)was applied as the index of drought research. Ac-cording to the daily meteorological data from thirty weather stations in Guanzhong Region of Shaanxi Province, SPI with time scales of year, season and month was calculated respectively， using forty- one years' meteorological data. Then spatial raster date was achieved based on the method of Kriging interpolation . The analysis of meteorological drought in Guanzhong Region indicated that anmual SPI presents decreasing trend of meteorological drought generally in the long term. In summer，SPI has an increasing trend, especially in June. However, SPI decreased remarkably in autumn and other month while SPI also appeared in decreasing tendencies of different degree. These changes of SPI showed that Guarzhong Region experienced serious annual meteorological drought with the characteristic of extremely autumn drought. The degree of meteorological drought increases gradually from southwest to northeast of the Guarzhong Region, and the eastem and north-central parts of Guanzhong Region were more susceptible to serious meteorological drought than other parts. In the year of drought，the whole region was widespread confronted with meteorological drought. |
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