SRC Method 에 의한 산지 소유역의 부유토사 유출량 산정 = The Estimation of Suspended Sediment Yield by the SRC Method in a Small Mountainous Catchment

다국어 초록 (Multilingual Abstract)

The estimation of suspended sediment yield was made by the SRC method in a small mountainous catchment. The regularities of suspended sediment discharge were also discussed by analyzing the discharge patterns of suspended sediment concentration. In order to accomplish the purpose of this study, the data of suspended sediment, water discharge and rainfall amount were collected during the year 1989. Throughout the study period, total 994 observations of sediment concentration during 16 runoff events were measured. The exponent n(C=kQⁿ) has a good relationship with total rainfall amount, and it decreases exponently. And the numerical coefficient k is proportional to total rainfall amount. The larger the rainfall amount is, the greater is the hysteresis effect of suspended sediment. Rainfall intensity is more important than rainfall amount in the discharge of suspended sediment and the total rainfall amount and suspended sediment yield have a good relation with each other. The suspended sediment discharge during June, August and September forms about 80 per cent of the annual discharge of suspended sediment. The main source of suspended sediment is in-channel, so the in-channel process must be considered as the most important factor in the development of valley formation.