从徐霞客游记研究三百多年来茈碧湖的演变*

根据《徐霞客游记》复原古茈碧湖原貌,以此进行古今对比研究,揭示湖泊演变过程及主要影响因素。

THE RKSEARCH ON THE CHANGES OF CIBI LAKE FOR RECENT 300 YEARS BASED ON XU XIA KE''S TRAVELS

The Change of lakes represents the changes of their envoirments,specialy for those oflittle lakes. Based on the records in Xu Xia ke's Travels ,in this thesis the authors recon-structed the o1d Cibi Lake which existed 300 years ago.The discoveries are as follows:1.During 17th centuny,the lake was alout twice as big as the present one and waschanging slowly. There were two connected lakas in this area. One was in the north,and the other in the south. 2.During 18-19th century,the population increased rapidly,and at the same time the affects of human activties were also intensified. The trees were cut doun, and large area of land was reclaimed for aguicultural uses. Conseguently,the lake was reduced greatly,and the south lake disappeared at that time. 3.During 20th century, the population is still growing.Local people turned the north lake into a small reservoir,The north lake, which changed rery slowly before,is also reducedgreatly now.The effects of the human activities are much greater than those of the nature. Human ac-tivities are the main causes of the shrinkage of the lake in recent 300 years.