ISSN (0970-2083)

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GEOCHEMICAL REACTIVE TRANSPORT MODELING IN CONTAMINATED AQUIFERS, BEIJING AREA, CHINA

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Abstract

Water supplies, which are vital to economic development, are severely at risk through pollution. Problems relating to water are more serious for some countries, such as China, where water is relatively scarce. A three-dimensional multicomponent reactive transport model was developed to predict the future development of groundwater quality in aquifers in and around Beijing. PHT3D, which combines the three-dimensional transport simulator MT3DMS with the geochemical model PHREEQC-2, was used as the model code. The model results showed that although nitrate in the groundwater was partially reduced by denitrification, nitrate was still present in excessive levels. The coupled model was able to quantify the influence of various land-use functions on groundwater quality, and it could identify the geochemical processes taking place in the aquifers. Finally, a novel conceptual model for an urban area that can be used to evaluate future site-remediation scenarios was developed as part of this study.

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