A Preliminary Study on the Evolution of Drought Sand Floods in the Jianghuai Area of Anhui during the Ming and Qing Dynasties——Taking Hangbu River as an Example
This paper quantified the year-by-year rank of disasters in the nearby states and countries of the Hangbu River basin through his torical data,calculated data such as the average rank values of droughts and floods by combining the characteristics of this basin with the methods of existing disciplines,and reconstructed the spatial and temporal evolu-tion sequence of droughts and floods in the basin to assist with the comprehensive management of the basin today.It was found that the basin was divided into six stages from 1428 to1905:from 1428 to 1477,the climate was relatively stable;from 1478 to 1559,droughts and floods alternated,with droughts predominating;from 1560 to 1614,the climate was more humid,with a high frequency of extremes;and from 1615 to 1725,the climate alternated between droughts and floods,with an increase in the frequency of extreme drought climates;from 1726 to1855 wet climate prevailed with fre-quent floods;from 1856 to 1905,droughts and flood took turns with redcued intensity.
drought and flood levelsHangbu Riverspatial and temporal sequencesMing and Qing dynasties
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