Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/hess-2018-26
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
12 Feb 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Hydrology and Earth System Sciences (HESS).
Evaluation of Lacustrine Groundwater Discharge, Hydrologic Partitioning, and Nutrient Budgets in a Proglacial Lake in Qinghai-Tibet Plateau: Using 222Rn and Stable Isotopes
Xin Luo1,2, Xing Xing Kuang3, Jiu Jimmy Jiao1,2, Sihai Liang4, Rong Mao1,3, Xiaolang Zhang1,3, and Hailong Li3 1Department of Earth Sciences, The University of Hong Kong, P. R. China
2The University of Hong Kong, Shenzhen Research Institute (SRI), Shenzhen, P. R. China
3School of Environmental Science and Engineering, South University of Science and Technology of China (SUSTC), Shenzhen, China
4School of Water Resources & Environment, China University of Geosciences, 29 Xueyuan Road, Beijing, China
Abstract. Proglacial lakes are good natural laboratories to investigate groundwater and glacier dynamics under current climate condition and to explore primary productivity under pristine lake status. This study conducted a series of investigations of 222Rn, stable isotopes, nutrients and other hydrogeochemical parameters in Ximen Co Lake, a remote proglacial lake in the east of Qinghai-Tibet Plateau (QTP). A radon mass balance model was used to quantify the lacustrine groundwater discharge (LGD) of the lake, leading to an LGD estimate of 10.3 ± 8.2 mm d−1. Based on the three end member models of stable 18O and Cl, the hydrologic partitioning of the lake is obtained, which shows that groundwater discharge only accounts for 7.0 % of the total water input. The groundwater derived DIN and DIP loadings constitute 42.9 % and 5.5 % of the total nutrient loading to the lakes, indicating the significance of LGD in delivering disproportionate DIN into the lake. The primary productivity of the lake water is calculated to be 0.41 mmol C m−2 d−1. This study presents the first attempts to evaluate the LGD and hydrologic partitioning in the glacial lake by coupling radioactive and stable isotopic approaches and the findings advance the understanding of nutrient budgets and primary productivity in the proglacial lakes of QTP. The study is also instructional in revealing the hydrogeochemical processes in proglacial lakes elsewhere.

Citation: Luo, X., Kuang, X. X., Jiao, J. J., Liang, S., Mao, R., Zhang, X., and Li, H.: Evaluation of Lacustrine Groundwater Discharge, Hydrologic Partitioning, and Nutrient Budgets in a Proglacial Lake in Qinghai-Tibet Plateau: Using 222Rn and Stable Isotopes, Hydrol. Earth Syst. Sci. Discuss., https://doi.org/10.5194/hess-2018-26, in review, 2018.
Xin Luo et al.
Xin Luo et al.

Viewed

Total article views: 127 (including HTML, PDF, and XML)

HTML PDF XML Total Supplement BibTeX EndNote
104 17 6 127 4 0 5

Views and downloads (calculated since 12 Feb 2018)

Cumulative views and downloads (calculated since 12 Feb 2018)

Viewed (geographical distribution)

Total article views: 124 (including HTML, PDF, and XML)

Thereof 124 with geography defined and 0 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 22 Feb 2018
Publications Copernicus
Download
Share