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A landcover map watershed of downstream reach in the Gyungan stream was made by using the existing land use map and interpreting satellite images and aerial photos. Based on the map, we analyzed land use patterns of this basin. Broad-leaved forest occupied the largest area among landscape elements established in this watershed. The total area of the zone designated as the waterside district by the central government was 4.7km 2 , and broad-leaved forest occupied the largest area as 33.9% in this zone. Therefore, the area did not meet the qualifications of riparian zones. Riparian vegetation established in the Gyungan stream watershed was composed of Phragmites communis,Miscanthus sacchariflorus,Salix gracilistyla,Salix koreensis. But terrestrial vegetation elements such as Ambrosia trifida,Ailanthus altissima,Robinia pseudoacaciaalso appeared in this area. On the other hand, Phragmites japonica, Salix gracilistyla,Salix koreensis,Salix integra,Ulmus davidianaand so on appeared in the riparian zone the reference streams. Differently from the vegetation established on the reference streams, terrestrial vegetation elements appeared frequently in the Gyungan stream watershed. This result would be due to that the Gyungan stream watershed is exposed to excessive human interferences. Key words:Landscape structure, Land use type, Reference stream, Riparian vegetation

Diagnosis on the Riparian Vegetation in the Downstream Reach of the Gyungan Stream for Creating Vegetation Belt