Origin and Geochemical Processes of Porewater in Clay-Rich Deposits in the North Jiangsu Coastal Plain, China

Figure 7

Plots of δ²H versus δ¹⁸O for porewater, aquifer groundwater, and river water samples. Samples with (α) represent the water samples in the study area which were collected from Fu [22] based on aqueous analyses. Samples with represent aquifer groundwater samples in the Huai River basin that were obtained from Ha et al. [28]. The LMWL (δ²H = 5.8δ¹⁸O-6.79) was plotted based on the δ¹⁸O and δ²H values of the average monthly rainfall at the nearest coastal station. The mixing line between the standard seawater and fresh aquifer groundwater (δ²H: −60.1; δ¹⁸O: −8.4) is depicted in red.