Effects of Anthropogenic on Karst Groundwater Geohydrochemistry in an Urbanized Area

Abstract:

Laolongdong Underground River used to be important drinking water source, but the water quality has been deteriorated since 1990s and the underground river becomes a sewer nowadays because of anthropogenic and urbanization influence. In order to find out the impacts of water-bedrock interaction, domestic sewage and agricultural activities on groundwater, the chemical characteristics of the groundwater were monitored each month to research the contamination sources and the contributed factors. The result shows that the groundwater is characterized as the HCO₃-SO₄-Ca type, which implys that groundwater geochemistry is controlled by middle and lower Triassic carbonate rocks. Moreover, the concentrations of K⁺, Na⁺, Cl^-, and PO₄^3- reveale an increasing trend and NO₃^- deceasing from 2008 to 2012. According to general contamination sources, the data implys that urbanization process and land use changing caused karst ground water pollution process and contaminations convert from agriculture effort to sewage and animal feces effort.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 2418-2423
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.2418
• Online since: August 2013
• Authors: Jia Cheng Lan, Qiu Fang He, Ning Hu, Peng Wang, Kun Ren, Xue Bin Chen
• Keywords: Anthropogenic Impact, Karst Groundwater, Sewage, Urbanization, Water-Bedrock Interaction

References

[1] D Yuan, D Zhu, J Weng. In Karst of China. Geological Publishing House, Beijing (1993).

[2] Sasowsky I, Wicks C. Groundwater flow and contaminant transport in carbonate aquifers . Balkeman Publishing, Rotterdam (2000).

[3] Panno S. V., Kelly W. R.. Journal of Hydrology. Vol. 3(2004)pp.229-242.

[4] Y Wang, X Gao. Carsologica Sinica,Vol. 28(2009)pp.103-114. (in Chinese)

[5] J Lang, C Liu, Z Zhao, S Li, G Han. Advances in Water Science.Vol. 16(2005)pp.826-832. (in Chinese)

[6] M. Cao. Karst Groundwater Geohydrochemical and Isotopic characters, an example of Laolongdong Underground River, Chongqing. Southwest University(2012). (in Chinese)

[7] J Pu, D Yuan, Q He, Z Wang, Z Hu, P Gou. Environ Earth Sci.Vol. 64(2011)pp.1985-1993

[8] Y Hu., Qi S.H., Zhang J.P., et al. Journal of Geochemical Exploration, Vol. 111(2011)pp.47-55

[9] S He, L Zhu, Z Dong, Y Zhang, X Yu. Enviromental Science, Vol. 31(2010)pp.1176-1182. (in Chinese)

[10] Adria' n O-G. Journal of Hydrology, Vol.284(2003)pp.26-44.

[11] Hem, J.D., Study and Interpretation of the Chemical Characteristics of Natural Water. U.S. Geological Survey Water-Supply (1989)p.2254.

[12] Valdes D, Dupont J P, Laignel B,et al. Journal of Hydrology, Vol. 340(2007)pp.244-255.

[13] Reimann, C., de Caritat, P. In Chemical Elements in the Environment. Springer, New York. (1998).

[14] Parkhurst, D.L., Stollenwerk, K.G., Colman, J.A., U.S. Geological Survey Water-Resources Investigations Report 03–4017, (2003).