[1]ZHAO Wei,ZHANG Yu,ZHANG Zhihong.Analysis of the Characteristics of Temporal and Spatial Variation of Seasonal Drought During 1981-2010 in Chongqing City[J].Research of Soil and Water Conservation,2016,23(03):192-198,203.
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Analysis of the Characteristics of Temporal and Spatial Variation of Seasonal Drought During 1981-2010 in Chongqing City
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 03
Page number:
192-198,203
Column:
Public date:
2016-06-28
- Title:
- Analysis of the Characteristics of Temporal and Spatial Variation of Seasonal Drought During 1981-2010 in Chongqing City
- CLC:
- S161
- DOI:
- -
- Abstract:
- According to measured meteorological data of 34 meteorological observation stations in Chongqing City, we select standardized precipitation index as drought index to calculate SPI value of each meteorological stations month by month and year by year from 1981 to 2010 and statistic drought degree of every station during 30 years. On this basis, we analyzed frequency, intensity and coverage of drought on the annual and seasonal scales, examined its temporal and spatial variation characteristics. The results show that: (1) Chongqing’s annual drought frequency is high in the east and low in the west, while drought intensity is mainly medium, highest in northeast Chongqing and relatively low in midwest and southeast Chongqing, drought occurrence area shows the trend o gradual increase over the period of 30 years, annual drought stations proportion differs greatly, is basically consistent with the history great drought year; (2) on the seasonal scale, drought happened most frequently in winter, followed by summer, autumn and spring, summer drought was the most severe among the four seasons, followed by autumn drought, winter drought and spring drought, the spatial distribution of spring, summer and winter drought was quite similar, the drought evolution in spring, winter showed a downward trend while in summer, autumn it showed a upward trend, reminded us to further strengthen the summer, autumn drought disaster prevention work so as to resist disaster; (3) Based on annual and seasonal scales, drought happened frequently in northeast and midwest Chongqing, the frequency and intensity of drought occurring in southeast Chongqing are relatively low.
- References:
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