Figure 10
From: Groundwater Throughflow and Seawater Intrusion in High Quality Coastal Aquifers
Set of graphs comparing measured water levels in the seawater intrusion monitoring (SIM) wells to monthly rainfall. Panel A shows measured water levels from 1990 to 2018. The frequency of measurements decreases after the IWSS pumping begins. The measured water levels in SIM 1, SIM 2, and SIM 3, are similar despite separation of 150 m (see Figs. 3 and 7). SIM 4 and SIM 6 also show similar measured water levels despite being separated by close to 200 m. Shallow gradients between these monitoring points suggests zones of localised extreme permeability. Panel B shows water levels and monthly rainfall between 1992 and 1995. Summer periods (October to March) are shaded orange and the winter periods (April to September) are shaded blue. A clear relationship between annual rainfall cycles and water levels is present.
