Natural and anthropogenic factors affecting the shallow groundwater quality in a typical irrigation area with reclaimed water, North China Plain.

In this study, the hydrochemical characteristics of shallow groundwater were analyzed to get insight into the factors affecting groundwater quality in a typical agricultural dominated area of the North China Plain. Forty-four shallow groundwater samples were collected for chemical analysis. The water type changes from Ca·Na-HCO type in grass land to Ca·Na-Cl (+NO) type and Na (Ca)-Cl (+NO+SO) type in construction and facility agricultural land, indicating the influence of human activities.