The flow of water into and out of the Keelung and Tanshui Rivers is controlled by sluices. From the north and east, two creeks and an irrigation channel also feed water into the area, creating a diversity of saltwater and freshwater ecologies.
這裡長期被堤防圍繞，靠閘門控制著與基隆河、淡水水域間的流動；還有二條溪流和灌溉渠道提供水源，而形成鹹、淡水交雜的型態。