3. RESULTS
3.1 Runoff and Sediment Yield
To investigate the temporal relationship between runoff and SY, this
study used observational data of the Water Resources Agency, Ministry of
Economic Affairs during 1999–2009 to plot the temporal distribution of
runoff and SY (Figure 7) and display the daily runoff and SY values.
Figure 7 shows that the peaks of runoff and SY occurred mostly during
July–October, and mainly in the typhoon season in Taiwan. The maximum
daily runoff and maximum daily SY occurred during Typhoon Morakot
(August 8, 2009), and the values were 228.55 and 10.35 mm, respectively.