Tracing groundwater discharge into a coal mining subsidence lake in eastern China: Observations from water stable (delta D and delta O-18) and radon (Rn-222) isotopes

Jiang, Chunlu1,2; Liu, Dou2; Jiang, Chenghong2; Wang, Qianqian3,5; Sadat-Noori, Mahmood4; Li, Hailong3

2023-09-01

10.1016/j.apgeochem.2023.105757

APPLIED GEOCHEMISTRY   Impact Factor & Quartile

0883-2927

1872-9134

Many coal mining subsidence lakes have formed in eastern China due to underground coal mining. Lacustrine groundwater discharge (LGD) is of great importance to the hydrological cycle and the eco-environment of lakes. However, LGD in coal mining area is rarely reported. In the study, we quantified groundwater discharge into a Huainan coal mining subsidence lake (China) using water stable (D and O-18) and radioactive (Rn-222) isotopes. Rn-222 and O-18 mass balance models were used to independently estimate LGD. The lake water was sampled based on the horizontal and vertical profile sampling. The isotope depth profiles were weighted according to the lake bathymetry to obtain a representative isotope inventory by geographic information system (GIS) analysis. The LGD rates estimated from two models were comparable, and the values were 18 mm d(-1) for the O-18 and 14 +/- 8 mm d(-1) for the Rn-222. Compared with the LGD of Ammelshainer See lake (Germany), a subsidence lake formed by coal mining, the LGD in the study was larger, which may be related to the different hydrological conditions in different areas. By integrating the LGD rates from these two models, this study quantitatively analyzed the role of groundwater in maintaining the water balance in subsidence lakes, which is of great significance to water resources assessment and sustainable utilization of coal mining subsidence lakes in eastern China.

Mining subsidence lake Groundwater discharge O-18 Rn-222 Isotope inventory

SCI

English

Corresponding

null[42107055]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:001054682000001

PERGAMON-ELSEVIER SCIENCE LTD

GEOSCIENCES

Web of Science

1.China Univ Min & Technol, Sch Resources & Geosci, Xuzhou 221116, Jiangsu, Peoples R China
2.Anhui Univ, Sch Resources & Environm Engn, Anhui Prov Engn Lab Mine Ecol Remediat, Hefei 230601, Anhui, Peoples R China
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
4.UNSW Sydney, Sch Civil & Environm Engn, Water Res Lab, Kensington, NSW 2052, Australia
5.1088 Xueyuan Rd, Shenzhen, Guangdong, Peoples R China

Jiang, Chunlu,Liu, Dou,Jiang, Chenghong,et al. Tracing groundwater discharge into a coal mining subsidence lake in eastern China: Observations from water stable (delta D and delta O-18) and radon (Rn-222) isotopes[J]. APPLIED GEOCHEMISTRY,2023,156.

Jiang, Chunlu,Liu, Dou,Jiang, Chenghong,Wang, Qianqian,Sadat-Noori, Mahmood,&Li, Hailong.(2023).Tracing groundwater discharge into a coal mining subsidence lake in eastern China: Observations from water stable (delta D and delta O-18) and radon (Rn-222) isotopes.APPLIED GEOCHEMISTRY,156.

Jiang, Chunlu,et al."Tracing groundwater discharge into a coal mining subsidence lake in eastern China: Observations from water stable (delta D and delta O-18) and radon (Rn-222) isotopes".APPLIED GEOCHEMISTRY 156(2023).