| 岩溶泉水化学性质及δ13CDIC影响因素 |
| 摘要点击 2135 全文点击 930 投稿时间：2014-12-17 修订日期：2015-01-11 |
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| 中文关键词 岩溶泉 水动力条件 HCO3-脱水 水化学性质 δ13CDIC |
| 英文关键词 karst spring hydrodynamic condition dehydration of HCO3- hydrochemistry δ13CDIC |
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| 中文摘要 |
| 为了深入研究岩溶泉水水化学性质与溶解无机碳同位素(δ13CDIC)的变化特征及其影响因素,在雨季(2014年6月~2014年10月)对柏树湾泉、兰花沟泉、后沟泉进行监测,并与旱季进行对比分析. 结果表明, 3个岩溶泉在雨季的碳酸盐岩溶蚀量大于旱季,但消耗的CO2量却小于旱季,其中兰花沟泉和后沟泉的CO2消耗量为负值. 相对于雨季其它月份,7月与旱季一样,岩溶作用减弱但消耗的CO2量增加. 因为受到水动力条件影响,7月H2CO3对碳酸盐岩溶蚀的贡献增加,而HNO3与H2SO4对碳酸盐岩溶蚀的贡献则降低. 另外,HNO3与H2SO4溶蚀碳酸盐岩及其对HCO3-产生的脱水作用都会导致δ13CDIC偏正,因此δ13CDIC与NO3-+SO42-浓度呈现出正相关性,而与HCO3-浓度呈现出负相关性. 这说明水动力条件以及HNO3与H2SO4的参与对岩溶泉水化学性质及δ13CDIC的变化具有重要影响. |
| 英文摘要 |
| To gain more knowledge on the change of karst spring and its influencing factors, the hydrochemistry and δ13CDIC of Baishuwan spring, Lanhuagou spring and Hougou spring were monitored in rainy season (from June 2014 to October 2014) and contrasted with the results obtained in dry season. The results showed that more carbonate rock was dissolved and less CO2 was consumed in rainy season. And for Lanhuagou spring and Hougou spring, the CO2 consumption was less than the production. Compared to other months in rainy season, the least carbonate rock dissolution and the most CO2 consumption were observed in July 2014. Influenced by hydrodynamic condition, carbonate rock dissolved by HNO3 and H2SO4 increased while that dissolved by H2CO3 decreased during the rainy season. The δ13CDIC increased due to the HNO3 and H2SO4 dissolution of carbonate rock and the dehydration of HCO3-. Therefore, δ13CDIC correlated negatively to HCO3- concentration and positively to NO3-+SO42- concentration. It was indicated that the hydrochemistry and δ13CDIC of karst springs were affected by the HNO3, H2SO4 and hydrodynamic condition. |
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