Questions? Questions: 1:General introduction to confined aquifer? 2:What is groundwater? 3:What is seawater intrusion? 4:What is the specialty of GW in the capillary fringe? Questions? Questions： 1：General introduction to confined aquifer? 2: What is groundwater? 3: What is seawater intrusion? 4: What is the specialty of GW in the capillary fringe?