地下水开采——重要的CO<sub>2</sub>排放源

贾国东; 段光杰; 钟佐燊

地下水开采——重要的CO₂排放源

1.
中国科学院广州地球化学研究所, 广东广州 510640
2.
中国地质大学水资源与环境工程系, 北京 100083

详细信息

作者简介:
贾国东(1969-), 男, 副研究员, 1998毕业于中国地质大学(北京), 获博士学位, 现主要从事有机地球化学和水文地球化学研究.E-mail: jiagd@263.net

中图分类号: P641
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出版历程
- 收稿日期: 2001-11-12
- 刊出日期: 2002-03-25

Groundwater Exploitation: An Important CO_2 Source

1.
Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou 510640, China
2.
Department of Water Resources and Environmental Engineering, China University ofGeosciences, Beijing 100083, China

摘要

摘要: 运用水文地球化学模拟软件计算了大庆市齐家水源地地下水的CO₂分压及地下水被抽出至地表与大气CO₂达成平衡后CO₂自水中的逸出量, 结果表明, 地下水p(CO₂)= 1.28× 10⁴ Pa, 显著高出大气p(CO₂); 当地下水到达地表环境后将有11.15 mmol/kg的CO₂释放进入大气.进一步的讨论得知, 各种岩性含水层的地下水都可以含有较高的p(CO₂).因而, 地下水的开采成为了一个不容忽视的CO₂人为排放源.这应该引起有关学者的重视.
- 水文地球化学模拟 /
- 地下水开采 /
- CO₂排放
Abstract: Partial CO₂pressure(p(CO₂))of groundwater from Qijia water supply base and mass transfers after the groundwater being pumped out to equilibrate with atmospheric CO₂are calculated by hydrogeochemical modeling. The results show that the groundwater p(CO₂)is pronounced higher than atmospheric p(CO₂), and that 11.15 mmol/kg CO₂will be emitted to the atmosphere when the groundwater reaches the surface. Further discussion has revealed that different lithologic aquifers usually contain higher groundwater p(CO₂).Consequently, groundwater exploitation hasbecome a man-made CO₂source and should arouse our attention.
- hydrogeochemical modeling /
- groundwater exploitation /
- CO₂ emission

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表 1 齐家水源地泰康组含水层水化学特征

Table 1. Hydrochemical characteristics of Qijia groundwater

表 2 地下水抽出至地表与大气充分平衡后的化学成分

Table 2. Hydrochemical composition of the pumped water equilibrated with air 10^-3mol/kg

表 3 地下水抽出至地表与大气平衡后产生的物质迁移量

Table 3. Mass transfers when groundwater being pumped out to equilibrate with air 10^-3mol/kg

表 4 不同岩性地区地下水成分及地下水到达地表后CO₂的逸出量

Table 4. Examples of groundwater compositions from different lithologic aquifers and amounts of CO₂ degassing after the groundwater being pumped to surface

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