Ratio of Major Ions in Groundwater to Determine Saltwater Intrusion in Coastal Areas

Global Colloquium on GeoSciences and Engineering 2017

Sudaryanto^1 ; Naily, Wilda^1

Research Center for Geotechnology, Indonesian Institute of Sciences, Indonesia^1

关键词: Clean waters;    Coastal area;    Coastal cities;    Environmental characteristic;    Groundwater aquifer;    Groundwater sampling;    Ion analysis;    Major ions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/118/1/012021/pdf
DOI  :  10.1088/1755-1315/118/1/012021

来源: IOP

【 摘 要 】

Saltwater or seawater intrusion into groundwater aquifers occurs mostly in big cities and developing coastal cities. Coastal hydrology is associated with complex and highly dynamic environmental characteristics of interactions between groundwater, surface water, and water from the estuary. The rise of sea levels and excessive use of groundwater for clean water source trigger saltwater intrusion. Identification of saltwater intrusion into groundwater can be done by groundwater sampling and major ion analysis. The major ions dissolved in water are Ca, Mg, Na, K, Cl, HCO3, and SO4; the major ion ratios are Cl/Br, Ca/Mg, Ca/ (HCO3and SO4), and Na/Cl. By knowing whether groundwater quality has been or has not been influenced by saltwater, groundwater zones can be determined in every coastal area. In addition, by analyzing and reviewing some concepts about the intrusion or contamination of saltwater into groundwater, there will be sufficient results for the identification of saltwater intrusion.