中文摘要：

本文对河北平原第四系地下水^14C年龄最新的结果进行了分析,得出如下认识：（1）垂向上,地下水的^14C年龄随深度的增加而增大,或者沿地下水的流向而增大。但是,在同一孔组中,地下水埋深大于300m时出现了混乱现象。地下水^14C年龄不但不增大,反而减小,其原因复杂;（2）水平方向上,第三含水组Q2地下水较老的年龄出现在河北平原中部,大致与子牙河方向一致,而第四含水组Q1地下水较老的年龄则呈北东东方向展布,即沧州—歧口一线分布,可能是地质结构影响所致。

英文摘要：

In this paper, the latest results of ^14C age of groundwater in the Hebei Plain are analyzed. The understanding is as follows ： （ 1 ） Vertically, the ^14C age of the groundwater increases as the increasing depth or along the flow path of groundwater. However, in the same hole group, the result is confused when depth to the groundwater level deeper than 300 m. The ^14C age of the groundwater has not increased, but decreased. The reasons for this are complicated ; （2） horizontal, in the 3rd aquifer group Q2, the older groundwater is in the center Hebei plain, generally in a line with the direction of the Ziya River. In the fourth aquifer group Q1, the older groundwater extends in a NEE direction from Cangzhou to Qikou, possibly due to the special geological structure.