DIVISION AND EVOLUTION OF DROUGHT AND FLOOD PHASES DURING THE LATEST 200 YEARS IN EASTERN CHINA

Lu Wenfang; Wang Qiang

doi:10.1007/BF02657940

Impact Factor: 5.8

Volume 3 Issue 4

Oct. 1986

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1986 > 3(4): 505-513

DIVISION AND EVOLUTION OF DROUGHT AND FLOOD PHASES DURING THE LATEST 200 YEARS IN EASTERN CHINA

1.
Department of Atmospheric Sciences, Nanjing University, Nanjing,Department of Atmospheric Sciences, Nanjing University, Nanjing

doi: 10.1007/BF02657940

Abstract
References
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Abstract:
Based on the past 200-year graded data of dryness/wetness in eastern China (24 stations), five phases to show the floods and droughts have been objectively divided by using the approach of cluster analysis of a sequential sample. The characteristics of flood/drought evolution have been described and explained. It is concluded that the floods or droughts occurred more often for the past two centuries, and the normal phase was seldom seen in eastern China. The transitions between floods and droughts are frequently of jumping feature. The extent and the frequency of serious drought or heavy flood in eastern China tended to expand and increase significantly in the last 50 years. Finally, by using the Walsh power spectrum, the periodicity of dryness/wetness graded series has been analysed. It is found that there exist the 2－9 year high-frequency fluctuations in eastern China.
References

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Manuscript History

Manuscript received: 10 October 1986

Manuscript revised: 10 October 1986

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

DIVISION AND EVOLUTION OF DROUGHT AND FLOOD PHASES DURING THE LATEST 200 YEARS IN EASTERN CHINA

1. Department of Atmospheric Sciences, Nanjing University, Nanjing,Department of Atmospheric Sciences, Nanjing University, Nanjing

Manuscript received: 1986-10-10
Manuscript revised: 1986-10-10

Abstract: Based on the past 200-year graded data of dryness/wetness in eastern China (24 stations), five phases to show the floods and droughts have been objectively divided by using the approach of cluster analysis of a sequential sample. The characteristics of flood/drought evolution have been described and explained. It is concluded that the floods or droughts occurred more often for the past two centuries, and the normal phase was seldom seen in eastern China. The transitions between floods and droughts are frequently of jumping feature. The extent and the frequency of serious drought or heavy flood in eastern China tended to expand and increase significantly in the last 50 years. Finally, by using the Walsh power spectrum, the periodicity of dryness/wetness graded series has been analysed. It is found that there exist the 2－9 year high-frequency fluctuations in eastern China.