摘要
同位素技术是研究区域地下水循环规律的主要手段之一。本文对平原区地下水进行了取样分析,运用同位素技术并结合水文地质条件,研究了北京市平原区地下水循环演化规律。运用~3H和^(14)C的测年技术确定了地下水年龄;利用D和^(18)O关系曲线探讨了地下水的起源;按照是否积极参加了现代水循环的原则将第四系地下水划分为浅层水和深层水;对浅层水和深层水的更新状况进行了研究。研究表明,浅层水广泛分布于北京平原区,径流条件好,更新快;深层水主要分布于永定河、潮白河冲洪积扇下部及冲洪积平原的深部地区,补给条件相对差,与现代大气降水联系弱,径流条件差,更新慢。
Isotope technology is one of the principal means on the regional groundwater circulation research. Based on samples of the groundwater, using isotope technology and combining hydrogeological condition analysis, this paper focuses on the groundwater circulation rule on Beijing plain area. In the paper, the groundwater age is calculated by using the dating techniques of 14C and 3H, and the groundwater source is analyzed by analyzing groundwater relation curves of D and 180. According to whether actively participated in the modern water circulation, the Quaternary aquifers in Beijing plain area are divided to shallow aquifer and deep aquifer, then the recovery situation of shallow and deep aquifers are studied. The result shows that the shallow water widely distributes in Beijing plain area, its runoff condition and recovery are relatively good; the deep water mainly distributes in bottom of alluvial-pluvial fans for the Yongding River and the Chaobai River, the recharge conditions are relatively poor, with the little interconnection with modern atmospheric rainfall.
出处
《城市地质》
2013年第1期23-27,共5页
Urban Geology
关键词
北京平原区
同位素
地下水年龄
更新速率
地下水循环
Beijing plain area Isotope Groundwater age Recovery rate Groundwater circulation
作者简介
邢国璋（1979-），男，硕士，主要从事地下水数值模拟和地下水调蓄研究。Email：xgz0914@sina．com。
