Abstract
In the previous studies on the suspended sediment runoff of river, the relationships between suspended sediment concentration (C) and discharge (Q) have been classified based on the time lag between the peaks of C and of Q or the shapes of hysteresis loop of the C-Q curves. In this paper, the C-Q relations observed in some watersheds in Okinawa are classified according to the previous researches and the characteristics of _suspended sediment runoff is also discussed. As the result, the explanations for the suspended sediment runoff described in the previous studies can be applied well to the observed data. Moreover, observed examples show that simultaneous types in the classification based on time lag and counterclockwise types in the classification based on the shape of C-Q curves are predominant in comparison with previous studies. This result means that the observed data in Okinawa indicate the characteristics of the erosive watersheds.
