중소유역의 수문학적 특성이 하천유사량에 미치는 영향 = The Effects of Hydrologic Characteristics on Sediment Discharge in Streams with Small and Medium Size Watersheds

다국어 초록 (Multilingual Abstract)

The purpose of this study is to provide with information for the water resources development and management in stream management planning, such as information on the sediment trensport, design of dam and water facilities, river improvement and flood plains management.
The major results obtained from the field measurement and analysis of the watershed characteristics, hydraulic and sediment characteristics are as follows ;
1. The rating curve formulas obtained from the analysis of the hydraulic characteristics data collected are ; Q=110.563 (H -0.474)² for 0.7m<H<1.5m, at Seogpo-Gyo and Q=66.214(H -0.146)² for 0.4m<H<1.6m, at Songriweon-Gyo.
2. The variations of vertical distribution of sediment concentration increased and of horizontal distribution of sediment concentration are negligible as the depth increased at Seogpo-Gyo and Songriweon-Gyo.
3. The results of the simple correlation analyses between specific sediment yield rate and various factors representing stream watershed characteristics show that the circumferential length of watershed, the number of streams, the total length of tributary, the average breadth of watershed, the shape factor and the basin relief are highly correlated with sediment yield(R=0.7~0.9), while the other characteristics are weakly correlated(R=0.4~0.7).
The multiple regression analyses between sediment yield rate and stream watershed characteristics resulted in two variable model ; Sr=aX₁²X₂^c, in the experimental watershed.