Acta Geographica Sinica ›› 2017, Vol. 72 ›› Issue (1): 27-38.doi: 10.11821/dlxb201701003

• Climate and Vegetation • Previous Articles     Next Articles

Drought and flood disaster chain and its response to climate change in Baoji region during the Ming and Qing dynasties

Honglian WAN1,2(), Hailong SONG2, Chanchan ZHU2, Mi ZHANG2   

  1. 1. Key Laboratory of Disaster Monitoring and Mechanism Simulation of Shaanxi Province, BaojiUniversity of Arts and Sciences, Baoji 721013, Shaanxi, China
    2. College of Geography andEnvironment, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, China
  • Received:2016-07-25 Revised:2016-10-19 Online:2017-01-20 Published:2017-03-23
  • Supported by:
    National Natural Science Foundation of China, No.41371497;Science Planning Subject of Shaanxi Province, No.2016KTCL03-17;Fundamental Research Funds for Key Subject Physical Geography of Baoji University of Arts and Sciences;Key Laboratory Foundation of Education Department of Shaanxi Province, No.15JS008;Science and Technology Project of Baoji City, No.14SFGG-2;Key Project of Baoji University of Arts and Sciences, No.ZK16031

Abstract:

In this paper, the literatures about the drought and flood disasters in Baoji region during the Ming and Qing dynasties were collected and sorted. The drought and flood disaster chains were discussed, while the response to climate change in Baoji region during 1368-1911 years was analyzed by using the accumulative anomaly method, moving average method and wavelet analysis and so on. The results showed that 297 events of drought and flood disasters occurred in Baoji during 1368-1911, while drought occurred 191 times and flood 106 times, accounting for 64.31% and 35.69%, respectively. There were obvious stage characteristics for drought and flood disasters, with drought episodes mainly observed from 1368 to 1644, while during 1645-1804 a fluctuant phase emerged, and the period 1805-1911 experienced drought episodes, presenting the alternating drought-wet period on the whole. Meanwhile there were three periods (70a, 110a and 170a) of oscillation on time scale of drought and flood existence, which had relationship with sunspot activity cycle. Drought and flood disasters had obvious variations in space; the northern and eastern parts of the Weihe river basin were prone to drought and flood. The occurrence of drought and flood disaster chains was a response to global climate change during the Ming and Qing dynasties in Baoji. Since the 1760s, the global climate deterioration has led to frequent extreme drought and flood disaster events.

Key words: Baoji region, drought and flood disaster chains, climate change, spatial temporal distribution characteristics, wavelet analysis