Assessing the Karst Groundwater Quality and Hydrogeochemical Characteristics of a Prominent Dolomite Aquifer in Guizhou, China
| Autor: | Xuewei Chu, Zhongmei Wang, Martin Torres, Genlan Yang, Prakash Paudel, Liangbo Hu |
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| Rok vydání: | 2020 |
| Předmět: |
lcsh:Hydraulic engineering
assessment 0208 environmental biotechnology Geography Planning and Development Dolomite Geochemistry Aquifer 02 engineering and technology 010501 environmental sciences Aquatic Science water quality 01 natural sciences Biochemistry lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 hydrogeochemical karst groundwater 0105 earth and related environmental sciences Water Science and Technology lcsh:TD201-500 geography aquifer geography.geographical_feature_category Karst Total dissolved solids 020801 environmental engineering Water resources dolomite TheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGES Environmental science Sedimentary rock Water quality Groundwater |
| Zdroj: | Water Volume 12 Issue 9 Water, Vol 12, Iss 2584, p 2584 (2020) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w12092584 |
| Popis: | Karst groundwater is one of the primary water resources in most provinces of Southwestern China where karst topography is strongly featured. In Guizhou Province, a prominent geologic sedimentary formation is the dolomite stratum which exists as the restricted platform facies and potentially provides a large reservoir for drinking water. A proper understanding and evaluation of its hydrogeochemical characteristics and water quality is the key to ensuring the drinking water safety. In the present study, groundwater samples were collected from 25 locations of the dolomite aquifer across Guizhou to determine their major chemical compounds, including the cations (K+, Na+, Ca2+, Mg2+) and the anions (HCO3&minus F&minus Cl&minus NO3&minus SO42&minus ), as well as the pH, total hardness, and total dissolved solids. HCO3&minus and Ca2+ were found to be the dominant anion and cation, respectively, which is characteristic of typical karst groundwater and supports the overall observation of a slightly weak acid to weak alkaline environment in the studied groundwater, as the pH measurements ranged from 6.80 to 8.37. Fuzzy comprehensive evaluation method is used to evaluate the groundwater quality based on typical drinking water safety standard. The results show that the groundwater in most of the studied aquifers is of reasonably good quality. However, in some aquifers, concentrations of NO3&minus and/or SO42&minus were found to be excessively high. Overall, the studied dolomite aquifer in its natural environment as investigated in the present study can be considered as a potential geological stratum for water resources exploitation in Guizhou. |
| Databáze: | OpenAIRE |
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