外源水对岩溶碳汇的影响——以桂林毛村地下河为例

黄芬; 唐伟; 汪进良; 曹建华; 殷建军

doi:10.3969/j.issn.1001-4810.2011.04.011

外源水对岩溶碳汇的影响——以桂林毛村地下河为例

doi: 10.3969/j.issn.1001-4810.2011.04.011

1.
中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室/联合国教科文组织国际岩溶研究中心
2.
中国地质科学院岩溶地质研究所/国土资源部、广西岩溶动力学重点实验室/联合国教科文组织国际岩溶研究中心；西南大学地理科学学院

基金项目: 国家自然科学基金项目(40702061和41072192)、“中国岩溶碳汇过程与效应研究”、“我国岩溶碳汇动态评价”、外源水对岩溶作用的响应研究(2010001)、2008年中国地质科学院岩溶地质研究所所控项目(不同土地利用条件下的岩溶水文水化学过程及其控制机理研究)、广西自然科学基金青年基金项目“广西典型峰林洼地的岩溶作用对大气CO2汇效应”(2010GXNSFB013004),中国地质科学院基本科研业务费项目(2010-SYS-15)

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出版历程
- 收稿日期: 2011-04-23
- 发布日期: 2011-12-25

The influence of allogenic water on karst carbon sink：A case study in the Maocun Subterranean River in Guilin, China

1.
Institute of Karst Geology, CAGS / Karst Dynamics Laboratory, MLR & GZAR / International Research Centre on Karst, under the Auspices of UNESCO
2.
Institute of Karst Geology, CAGS / Karst Dynamics Laboratory, MLR & GZAR / International Research Centre on Karst, under the Auspices of UNESCO；School of Geographical Sciences, Southwest University

摘要

摘要: 以桂林毛村地下河为对象,研究了外源水对岩溶碳汇的影响。观测计算结果表明:外源水进入岩溶区后,由于内外源水相互混合,提高了岩溶水的溶蚀能力,以致DIC含量不断升高,其碳酸盐饱和指数也逐渐增加,SIc由不饱和达到饱和,增加了岩溶碳汇的通量。2010年9月至2011年3月仅以位于地下河上游的小龙背的外源水补给量和地下河出口的HCO3-浓度进行计算,岩溶碳汇通量由2.28×105g增加至2.04×106g,增加了近10倍。碳汇通量的增加固然与沿途大气降水、植被及土地利用等可能产生的CO2输入有关,但更与外源水加入形成的混合溶蚀作用有关。因此,在岩溶碳汇通量计算中外源水的影响作用不容忽视。
- 外源水 /
- 岩溶碳汇 /
- 地下河 /
- 桂林毛村
Abstract: Based on the field monitoring and theoretical calculation, this research studied the influence of allogenic water on karst carbon sink flux in the Maocun Subterranean Stream in Guilin. The results showed that (1) entered into karst area, allogenic water mixed with autogenic water, which enhanced karst water corrosion, increased DIC concentration and carbonate saturation index gradually, changed SIc from unsaturated into saturated and increased the karst carbon sink flux; (2)during September 7, 2010 to March 26, 2011, the carbon sink flux increased about 10 times (from 2.28×105g to 2.04×106g ), calculated only with the allogenic water recharge of Xiao Long Bei in the upstream and the HCO3- concentration of outlet water of underground river; (3) the increase of carbon sink flux have some connection with potential CO2 input due to precipitation, vegetation and land-use types on the way, but have more to do with mixture corrosion of allogenic water. So, allogenic water takes an obvious contribution to karst carbon sink, and can’t be ignored in calculation of karst carbon sink.
- allogenic water /
- karst carbon sink /
- subterranean stream /
- Maocun in Guilin

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