Assessment of groundwater quality for irrigation purposes and identification of hydrogeochemical evolution mechanisms in Pengyang County, China

Groundwater is an important water source for agricultural irrigation in Penyang County. Some traditional methods such as irrigation coefficient, sodium adsorption ratio, total alkalinity, total salinity and total dissolved solids were employed to assess groundwater quality in this area. In addition,...

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Bibliographic Details
Published in:Environmental earth sciences 2013-08, Vol.69 (7), p.2211-2225
Main Authors: Li, Peiyue, Wu, Jianhua, Qian, Hui
Format: Article
Language:English
Subjects:
Assessments
Biogeosciences
Dissolution
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Environmental Science and Engineering
Evolution
Evolutionary biology
Exact sciences and technology
Geochemistry
Geology
Ground-water quality
Groundwater
Hydrogeology
Hydrology. Hydrogeology
Hydrology/Water Resources
Irrigation
Mathematical models
Mineralogy
Minerals
Original Article
Quality
Silicates
Terrestrial Pollution
Water geochemistry
Water resources
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Summary:Groundwater is an important water source for agricultural irrigation in Penyang County. Some traditional methods such as irrigation coefficient, sodium adsorption ratio, total alkalinity, total salinity and total dissolved solids were employed to assess groundwater quality in this area. In addition, an improved technique for order preference by similarity to ideal solution model was applied for comprehensive assessment. The origin of major ions and groundwater hydrogeochemical evolution was also discussed. Groundwater in Penyang County contains relative concentrations of dominant constituents in the following order: Na +  > Ca 2+  > Mg 2+  > K + for cations and HCO 3 −  > SO 4 2−  > Cl −  > CO 3 2− for anions. Groundwater quality is largely excellent and/or good, suggesting general suitability for agricultural use. Calcite and dolomite are found saturated in groundwater and thus tend to precipitate out, while halite, fluorite and gypsum are unsaturated and will dissolve into groundwater during flow. Groundwater in the study area is weathering-dominated, and mineral weathering (carbonate and silicate minerals) and ion exchange are the most important factors controlling groundwater chemistry.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-012-2049-5