Figure 6. Contour of groundwater level for 1470 days of pumping
the piedmont plain area is no longer recharged to the wetland, and the amount of water recharged from the wetland to the piedmont plain aquifer was 2702.9 m3/d. This process is the third process of wetland–aquifer interaction. Figures 7 and 8 show the relationship between base flow and induced infiltration with time. In the next numerical simulation, the third process is continued, and the induced infiltration from the wetland to the piedmont plain aquifer gradually increases. The induced infiltration increases to 6386.4 m3/d at 7200 days.
To visually observe the groundwater divide formed between the piedmont plain and the wetland due to groundwater exploitation, three calculation points are set up to observe the water level change between the piedmont plain and the wetland in order to determine the specific location of the groundwater divide. The coordinates of the five calculation points are shown in Table 2.
Table 2 Location of head observation wells