수심적분법에 의한 유사량 추정연구 = A Study on Estimation by Depth Integrating Method of Sediment Discharge

다국어 초록 (Multilingual Abstract)

In Korea, total sediment discharge of a river has been estimated simply by using certain sediment transport formulas including, among others, Einstein's formula. Those formular, however, are known not to be reliable enough for the result calculated by them to be used directly to river planning and management.
Therefore, the study used the Modified Einstein Procedure to the estimation of total sediment discharge, because this method is reliable estimated by measurement.
Here, measurement of sediment discharge used depth integrating method.
The major results obtained from the study for estimation by depth integrating method of sediment discharge in Naeseong stream are as follow;
1. The sedeiment characteristics of Naeseong stream are;
The distribution of sediment grain size shows that silt and clay are 55% and sand is 45%, and the bed load sediment grain size is constituted that sand contained with the grain size from 0.062mm to 2.0mm is 80%
2. The sediment rating formulas derived from the regression analysis between the sediment discharge and flow discharge are;
Seogpo-Gyo : Qs=0.017×10^-4 Q^2.352, where discharge is 10cms<Q<100cms.
Songriweon-Gyo : Qs=0.074×10^-4 Q^2.066, where discharge is 10cms<Q<120cms.
3. The sediment discharge fluctuates with the wider range variation than the flow discharge does. As the rate of flow discharge increased, the portion of suspend load in total load increased as well.