| Popis: |
The Toyohira River flows steeply through central Sapporo. Because the river passes though an urban area, its top priority is safety in times of flooding and environmental conservation and recreational use at other times. The riparian woods on the Toyohira are important for its ecosystem and landscape, but they hinder the flow of floodwater. Thus, there is a call for a felling technique that preserves environment, is effective for a long period and prevents hindrance to flow of floodwaters. We evaluated the river habitat by surveying the flora and fauna after a method of 80% felling. |
