The formation of the pond was directly caused by long-term land subsidence due to over-pumping of groundwater in the coastal plain.
The park features a famous 'sunken' house structure that remains partially submerged, serving as an iconic visual symbol of the area's history.
It is a key stopover for migratory birds using the East Asian-Australasian Flyway.
The boardwalk system covers over 100 meters, specifically designed to minimize impact on the sensitive wetland environment.
During the monsoon season, the pond expands significantly, functioning as a critical flood-mitigation reservoir for Kouhu Township.
Yiwu Wet Pond is a coastal wetland ecosystem in Kouhu Township, Yunlin, serving as a vital sanctuary for migratory birds. The pond originated from land subsidence caused by excessive groundwater extraction, leading to the gradual flooding of former farmlands. It is now part of the Southwest Coast National Scenic Area and features extensive wooden boardwalks elevated above the water. The area acts as a natural water detention basin during heavy rainfall and typhoon seasons. The landscape is characterized by remnants of abandoned stone houses and submerged structures that provide a stark visual reminder of the region's geological transformation. It is a significant site for birdwatchers, especially during winter months when thousands of waterfowl inhabit the area.
The elevated viewing platform overlooking the partially submerged ruins during the 'golden hour'.
Bring binoculars as the bird-watching opportunities are best at a distance from the main boardwalk.
Visit during the late afternoon to witness the sunset reflecting off the expansive, calm water surfaces.
Wear insect repellent, as the stagnant water attracts significant mosquito activity.
Attempting to walk on the exposed mudflats, which are unstable and ecologically sensitive.
Stay strictly on the designated wooden boardwalks to avoid damaging fragile wetland flora and disturbing bird habitats.
