Figure 4

A map showing the study site, Hwasun Bay of Jeju Island, and sampling locations of seawater (circle) and groundwater (triangle) in October 2018. This figure was drawn using Adobe Illustrator Version 24.1.3.

A map showing the study site, Hwasun Bay of Jeju Island, and sampling locations of seawater (circle) and groundwater (triangle) in October 2018. This figure was drawn using Adobe Illustrator Version 24.1.3.