The wetland is located at the estuary of the Yanshui River, bordering zone A2 of Sicao Wetland. From the north, the wetland starts from the north levee of the Yanshui River main drainage. To the south, it meets Anping levee. In the east, it borders the Provincial Highway No. 17 and Guanhai Bridge in Dagang. In the west, it extends to the 6m depth contour in the waters. Totally, it occupies a total area of 635 hectares. In recent years, the intermediate egret (Ardea intermedia) reproduces along the coastal area in southwestern Taiwan and establishes a new stock.