[1]ZHANG Xuemao,DU Huaming,DONG Tingxu,et al.Precipitation Characteristics and Spatial and Temporal Distribution Characteristics of Drought and Waterlogging in the Farming-Grazing Transitional Zone of Couth China in the Period 1960-2017[J].Research of Soil and Water Conservation,2020,27(05):126-132.
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Precipitation Characteristics and Spatial and Temporal Distribution Characteristics of Drought and Waterlogging in the Farming-Grazing Transitional Zone of Couth China in the Period 1960-2017
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 05
Page number:
126-132
Column:
目次
Public date:
2020-08-20
- Title:
- Precipitation Characteristics and Spatial and Temporal Distribution Characteristics of Drought and Waterlogging in the Farming-Grazing Transitional Zone of Couth China in the Period 1960-2017
- Keywords:
- SPI; wavelet analysis; precipitation characteristics; drought and waterlogging disaster; farming-grazing transitional zone of south China
- CLC:
- P426.616
- DOI:
- -
- Abstract:
- In order to understand the precipitation and drought characteristics in the farming-grazing transitional zone of south China, and provide a good scientific evidence for the assessment, prediction and active response of drought and flood disasters in this area, based on monthly precipitation data of 20 meteorological stations in the farming-grazing transitional zone of south China from 1960 to 2017, the precipitation characteristics, spatial and temporal patterns of drought and flood disasters in the farming-grazing transitional zone of south China in recent 58 years were studied by using standardized precipitation index(SPI), Kriging spatial interpolation and wavelet analysis. The results showed that:(1)in the past 58 years, the average annual precipitation of the farming-grazing transitional zone of south China had been increasing at the rate of 3.98 mm/decade, and the annual precipitation had a period of abundance-blight and abundance change of about 31 years;(2)due to the influence of monsoon, topography, altitude and other factors, precipitation in spatial distribution with Vici-Litang-Ruoergai as the boundary presented the high value center in the southeast, low value center in the northwest, showing the trend of decreasing from southeast to northwest;(3)the frequency of waterlogging occurred in the study area in 80s and 90s of the 20th century; then the frequency of drought occurred in the 60s and 70s of 20th century; in the end the frequency of drought and flood disasters had decreased since 2000. The annual precipitation in this area is increasing year by year, and there are obvious periodic changes, and the spatial distribution of precipitation is decreasing from southeast to northwest. Drought and flood disaster have reduced since 2000 in this area.
- References:
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Last Update:
2020-08-25