采用历史文献及地名学的研究方法,对明代以后海河南系平原地区的湖沼演变过程进行分析。结果表明,明代至16世纪后期,该区主要有南起任县、北至宁晋的广阔湖泊——大陆泽。17世纪初,大陆泽分解成南泊大陆泽与北泊宁晋泊。分解时,大陆泽比宁晋泊更为深广。此后大陆泽不断缩小,宁晋泊却持续扩大。至19世纪初,宁晋泊已3倍于大陆泽。19世纪二三十年代之后,两湖泊同时发生显著萎缩。19世纪末,大陆泽就已走向消涸,宁晋泊此时也已"不显泊形",并在20世纪初同样走向终结。

The lakes once distributed all over the plain in the southern part of the Haihe River valley have now disappeared completely.As for the evolution and dry-up of these lakes,there are only general findings and conclusions, in need of further researches of higher resolution.Based on almost exhaustive historical archives and with the help of toponomy methods,this paper carries out an in-depth analysis to the evolution of the major lakes and clearly maps out the important evolving process from prosperity to extinction of these lakes.The principal findings are: During the Ming Dynasty to the late 16th century,there was the Daluze Lake,which extended from Renxian County at the southernmost to Ningjin County at the northernmost(both present location).In the early 17th century,the Daluze Lake disaggregated into two parts,with the Daluze Lake at the south and the Ningjinpo Lake at the north.On disaggregation,Daluze was deeper and wider than Ningjinpo.However,Ningjinpo thereafter continued to expand and,in the early 19th century,it became three times as large as Daluze,which was continuously shrinking.The two lakes simultaneously presented significant and rapid shrinkage since the 1820s or the 1830s.By the end of the 19th century,Daluze dried up entirely,while Ningjinpo could be hardly called a lake and at last became dry land by the end of 20th century.