A saltwater intrusion prevention system (100) for use at an interface (102) between a fresh water body (104) and a saltwater body (106) includes a water recovery subsystem (160) for recovering fresh water from the fresh water body (104). A retention reservoir (166) in fluid communication with the water recovery subsystem (160) receives and redirects the recovered fresh water (189). A saltwater intrusion barrier subsystem (162) in fluid communication with the retention reservoir (166) is positioned at the interface (102) of the fresh water body (104) and the saltwater body (106). The saltwater intrusion barrier subsystem (162) includes a plurality of submerged return discharge ports (216) for vertically ejecting the recovered fresh water for providing hydraulic mounding zone, and a fine air bubbler header for creating a mixing zone. The hydraulic mounding zone and the mixing zone increase the density of the fresh water for offsetting saltwater from the saltwater body.
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