Changes Of River-lake In North Huaihe River Area Of Anhui Province During The Ming And Qing Dynasties

River-lake environment of North Huaihe River Area of Anhui Province have changed a lot during the Ming and Qing dynasties.As for rivers,The change of Suihe River is the greatest in Ming Dynasty,the river source is changeable,the estuary increases;in the upper reaches of Suihe River in Qing Dynasty,it increases from one strand to three strands,and the lower reaches of Suihe River also change repeatedly in order to guarantee the "storing and brushing yellow".Huihe silting mainly occurred in Yuan Dynasty and before.During the Ming and Qing dynasties,the changes of Huihe River showed that it was difficult to find the source of Huihe River,The "five rivers" in Wuhe County are only "three rivers" which are closely related to the changes of the Huihe estuary.The changes of the vortex river and the Yinghe river are relatively small,but the two rivers are frequently invaded by the Yellow River,and the "vortex" and "stand out" events often occur.As for lakes,the lakes in northern Anhui are either "dead" or "new".Some lakes are gradually shrinking or even disappearing as a result of siltation of the Yellow River,combined with artificial occupation and reclamation,while others are originally depressions,filled with floods and human intervention,and accumulated into new lakes.As an important part of the natural environment,rivers and lakes will have a significant and far-reaching impact on the local environment.The negative change of river and lake environment in north Huaihe river area of Anhui has brought a lot of negative effects to the north Huaihe river area of Anhui.During the Ming and Qing dynasties,the flood disasters increased in north Huaihe river area of Anhui,and the change of soil and water conditions in some areas led to water conservancy disputes,land disputes and other contradictory disputes.According to the study of the change of rivei-lake in north Huaihe river area of Anhui,on the one hand,we can figure out the historical facts about the process of changes;on the other hand,it can provide references for comprehensive control of presentnorth Huaihe river area of Anhui procince.