Gyeongpo Lake was a
bay 6,000 years ago but became a lagoon. The area of the lake was continuously reduced due to soil influx from nearby river valley and artificial landfilling. It was 1.74 km2 in the 1910s but became 0.90 km2 in the 2000s. In 1982, Gyeongpo Lake with Sageunjin Beach, Gyeongpo Beach, Gangmun Beach and Songjeong Beach were designated as Gyeongpo Provincial Park but in 2016, most of the beaches were excluded from the designation. == Ecosystem ==