Figure 2

Box plots of spatial variation for δ18O (a) and δ2H (b) among Yazi River, Shiting River Pihe River and Jiangxi River. The box plot has lines at the lower quartile, median, and upper quartile values. The whiskers of the box are lines extending from each end of the box to show the extent of the rest of the data. The outliers of the box are data with values beyond the ends of the whiskers.