Hydrochemical characteristics and genesis of the groundwater in Funing County, Northern Jiangsu

TAO Xiaohu; WANG Hesheng; GONG Jianshi; XU Naizheng; TAN Mengjiao; HU Xiaoyu; DAI Feihu; MENG Xianchao; ZHU Chunfang; ZHOU Kaie; LI Liang

doi:10.16788/j.hddz.32-1865/P.2023.03.011

2023 Vol. 44, No. 3

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Article navigation > East China Geology > 2023 > 44(3): 357-366

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TAO Xiaohu, WANG Hesheng, GONG Jianshi, XU Naizheng, TAN Mengjiao, HU Xiaoyu, DAI Feihu, MENG Xianchao, ZHU Chunfang, ZHOU Kaie, LI Liang. 2023. Hydrochemical characteristics and genesis of the groundwater in Funing County, Northern Jiangsu. East China Geology, 44(3): 357-366. doi: 10.16788/j.hddz.32-1865/P.2023.03.011

Citation:

TAO Xiaohu, WANG Hesheng, GONG Jianshi, XU Naizheng, TAN Mengjiao, HU Xiaoyu, DAI Feihu, MENG Xianchao, ZHU Chunfang, ZHOU Kaie, LI Liang. 2023. Hydrochemical characteristics and genesis of the groundwater in Funing County, Northern Jiangsu. East China Geology, 44(3): 357-366. doi: 10.16788/j.hddz.32-1865/P.2023.03.011

Hydrochemical characteristics and genesis of the groundwater in Funing County, Northern Jiangsu

1. Nanjing Center, China Geology Survey, Nanjing 210016, Jiangsu, China;
2. Water Resources Service Center of Jiangsu Province, Nanjing 210029, Jiangsu, China;
3. Funing Bureau of Natural Resources and Planning, Yancheng 224400, Jiangsu, China;
4. Key Laboratory of Watershed Eco-Geological Processes, Ministry of Natural Resources, Nanjing 210016, Jiangsu, China

More Information

Corresponding author: WANG Hesheng, 411099641@qq.com

Received Date: 15 March 2023

Revised Date: 13 June 2023

Abstract

Abstract

For investigating hydrochemical evolution and recharge characterisitcs of the groundwater in Funing County, northern Jiangsu Province, the study collected various water samples from regional surface water, phreatic water and confined water (the Ⅱ, Ⅲ and Ⅳ confined water) and analyzed their hydrogen and oxygen isotopes (δ¹⁸O-δD) relations, distributive rules of water salinity, major ions’ relations and hydrochemical characteristics in combination of mathematical statistical analysis, Piper three-line diagram, Gibbs model and hydrochemical characteristic coefficient. The results show that: ① the groundwater in Funing is weakly alkaline in general, mass concentration of cations in both phreatic water and confined water are distributed in the sequence of Na⁺>Ca²⁺>Mg²⁺>K⁺; those of anions in the phreatic water presents as HCO^-₃>Cl^->SO^2-₄>NO^-₃while that in the Ⅱ, Ⅲ and Ⅳ confined water presents as HCO^-₃>SO^2-₄>Cl^->NO^-₃; The total dissolved solids (TDS) of the phreatic water is relatively higher than that of the Ⅱ, Ⅲ and Ⅳ confined water, with locally brackish and saline water; The water quality in the confined area is significantly better than that in the phreatic area. ② The groundwater recharge in the study area is related to the atmospheric precipitation. The phreatic water is closely associated with modern precipitation while the Ⅱ, Ⅲ and Ⅳ confined water mainly sourced from precipitation replenishment in Late Pleistocene or even earlier; ③ The chemical characteristics of groundwater in the region are less affected by precipitation and more controlled by water rock interaction and cation exchange, among which the salinity of the Ⅱ, Ⅲ, and Ⅳ confined water mainly come from the weathering of silicate rocks, and human activities have slight impact on the chemical composition of the groundwater.
- Funing County /
- groundwater /
- hydrochemical characteristics /
- hydrogen and oxygen isotopes /
- hydrochemical genesis

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References

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