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《Acta Geographica Sinica》 2017-01
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Drought and flood disaster chain and its response to climate change in Baoji region during the Ming and Qing dynasties

WAN Honglian;SONG Hailong;ZHU Chanchan;ZHANG Mi;Key Laboratory of Disaster Monitoring and Mechanism Simulation of Shaanxi Province, Baoji University of Arts and Sciences;College of Geography and Environment, Baoji University of Arts and Sciences;  
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, 110 a 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 1760 s, the global climate deterioration has led to frequent extreme drought and flood disaster events.
【Fund】: 国家自然科学基金项目(41371497);; 陕西省科技计划项目(2016KTCL03-17);; 宝鸡文理学院自然地理学陕西省重点学科基金项目;宝鸡文理学院重点项目(ZK16031);; 陕西省教育厅重点实验室项目(15JS008);; 宝鸡市科技计划项目(14SFGG-2)~~
【CateGory Index】: P426.616
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