دورية أكاديمية
The effects of agricultural activities and atmospheric acid deposition on carbonate weathering in a small karstic agricultural catchment, Southwest China
| العنوان: | The effects of agricultural activities and atmospheric acid deposition on carbonate weathering in a small karstic agricultural catchment, Southwest China |
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| المؤلفون: | Yu Chen, Yongjun Jiang |
| المصدر: | Acta Carsologica, Vol 45, Iss 2 (2016) |
| بيانات النشر: | Slovenian Academy of Sciences and Arts, 2016. |
| سنة النشر: | 2016 |
| المجموعة: | LCC:Petrology LCC:Stratigraphy |
| مصطلحات موضوعية: | carbonate weathering, karst groundwater, agricultural activities, atmospheric acid deposition, qingmuguan, southwest china, Petrology, QE420-499, Stratigraphy, QE640-699 |
| الوصف: | In order to quantify the sources and fluxes of DIC, the effects of the use of N-fertilizers and acid deposition on carbonate weathering have been quantified by hydrochemistry and δ13CDIC of groundwater in Qingmuguan underground river system (QURS) – a small karstic agricultural catchment of Southwest China. The results show that: (1) the significant temporal variations for major element concentrations and δ13CDIC of groundwater in different months were observed, especially, of which the groundwater showed significant high concentrations of DIC, Ca2+, Mg2+, NO3−, SO42− and δ13CDIC in rainy season and fertilizing period in the QURS; (2) the contributions of carbonate dissolution by carbonic acid to total concentrations of (Ca2++Mg2+) and HCO3− of groundwater in different months averaged 68.5 % and 81.0 %, respectively. While the contributions of carbonate dissolution by nitric acid originated from the use of N-fertilizers and atmospheric acid deposition to total concentrations of (Ca2++Mg2+) and HCO3− of groundwater in different months averaged 11.1 % and 6.7 %, respectively, and the contributions of carbonate dissolution by sulphuric acid originated from the atmospheric acid deposition to total concentrations of (Ca2++Mg2+) and HCO3− of groundwater in different months averaged 20.4 % and 12.3 %, respectively; (3) the δ13CDIC increased obviously with (Ca2++Mg2+)/HCO3− of groundwater in the rainy season and fertilizing period indicated that the use of N-fertilizers and atmospheric acid deposition should be responsible for the elevated the δ13CDIC and the molar ratio of (Ca2++Mg2+)/HCO3− of groundwater in the QURS. Key words: carbonate weathering, karst groundwater, agricultural activities, atmospheric acid deposition, Qingmuguan, Southwest China. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 0583-6050 1580-2612 |
| العلاقة: | https://ojs.zrc-sazu.si/carsologica/article/view/4507Test; https://doaj.org/toc/0583-6050Test; https://doaj.org/toc/1580-2612Test |
| DOI: | 10.3986/ac.v45i2.4507 |
| الوصول الحر: | https://doaj.org/article/fffeb04986a24d1e84d2b776aed08af7Test |
| رقم الانضمام: | edsdoj.fffeb04986a24d1e84d2b776aed08af7 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 05836050 15802612 |
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| DOI: | 10.3986/ac.v45i2.4507 |