Isotopes and Sustainability of Ground Water Resources, North China Plain
Isotopes and Sustainability of Ground Water Resources, North China Plain
复制标题
DOI：
10.1111/j.1745-6584.2005.0038.x
复制
发表时间：
2005-07
期刊：
影响因子：
2.6
通讯作者：
C. Zongyu;Nie Zhenlong;Zhang Zhaoji;Qi Jixiang;Nan Yunju
中科院分区：
文献类型：
--
作者：
C. Zongyu;Nie Zhenlong;Zhang Zhaoji;Qi Jixiang;Nan Yunju
深层承压水是华北平原工农业和生活用水的主要水源之一。地下水年龄和补给量的详细信息对于这些水资源的正确管理至关重要，为此，我们利用水中溶解无机碳和氚的碳14测量了华北平原地下水的年龄并确定了补给区。这些同位素数据表明，华北平原皮埃蒙特地区的地下水年龄大多小于40年，是局部补给的。而华北平原中部和沿岸的部分地下水的年龄为1万~ 2.5万年。地下水的δ 18 O（δD）值比皮埃蒙特平原地下水的δ 18 O（δD）值低1.7‰（11‰），可能反映了末次冰期气候较冷时地下水的补给。根据δ 18 O值，该补给水的温度范围为3.7°C至8.4°C，而现代补给水的温度为12°C至13°C。综合同位素数据表明，华北平原中部和沿岸的部分地下水是在非稳定状态下开采的。
Ground water in deep confined aquifers is one of the major water resources for agricultural, industrial, and domestic uses in the North China Plain. Detailed information on ground water age and recharge is vital for the proper management of these water resources, and to this end, we used carbon 14 of dissolved inorganic carbon and tritium in water to measure the age and determine the recharge areas of ground water in the North China Plain. These isotopic data suggest that most ground water in the piedmont part of the North China Plain is <40 years old and is recharged locally. In contrast, ground water in the central and littoral portions of the North China Plain is 10,000 to 25,000 years old. The δ18O (δD) values of this ground water are 1.7‰ (11‰) less than that in the piedmont plain ground water and possibly reflect water recharged during a cooler climate during the last glaciation. The temperature of this recharge, based on δ18O values, ranges from 3.7°C to 8.4°C, compared to 12°C to 13°C of modern recharge water. The isotopic data set combined indicates that ground water in the central and littoral part of the North China Plain is being mined under non–steady state conditions.