Fig 2. Box plots of the groundwater concentrations of the major ions in the Yuncheng Basin.
(a), shallow groundwater; (b), deep groundwater. The concentrations of Ca, Mg and NO3- refer to the right axis.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.