摘要
地下水中14C的年代与PMC(与大气中现代碳的百分含量之比)值的大小反映了地下水的补给、迳流、排泄的状况与循环条件。豫北平原地下水中的14C的年代与PMC值反映出:引黄灌区主干渠、山前冲洪积扇、近黄河地带为地下水强补给与迳流带,地下水14C年龄较小,地下水循环交替快;在交接洼地、微咸水区、地下水位下降漏斗区,地下水迳流滞缓,地下水14C年龄较大,地下水循环交替慢。其它资料也验证了此规律。
The ratio of the age of the ^14C in groundwater and the PMC value （percentage content of the present carbon in the air） reflect the groundwater recharge, runoff, discharge and circulation conditions. The ratio in the northern plain area of Henan province shows that the main irrigation ditches, the piedmont alluvial fans and the belts near the Yellow River are the strong recharge and runoff belts, which the ^14C age is low and the groundwater circulation is fast, that the groundwater runoff in the joint downland, the brackish groundwater area and the water table depression cone area is slow, where the ^14C age is high and the groundwater circulation is low.
出处
《工程勘察》
CSCD
北大核心
2006年第8期32-34,共3页
Geotechnical Investigation & Surveying
