The sewage canal, which was believed to be in the same location as the ‘Old Emscher’ river, could not remain as it existed on the site, and was placed underground (Diedrich, 73). A new canal has taken the place of the sewage canal, but is now flowing with fresh rainwater. Instead of creating a more "naturally" shaped waterway, this new canal, the Emscher River, was kept as straight as the canal before. The canal aids in one's understanding of water processes and changes in time. Markers made by soil mounds (these also break up the culvert form) allow the depth of the water to be read by the visitor to the site. Here the visitor is able to understand on a seasonal basis the process of the site and mark their experience of the park by how high the water was.