Thirteen flash flood events with total runoff volume more than the
threshold 100 m3 have been successfully recorded
during the five rainy seasons, though the observation system failed to
record the other two significant events on April 12, 2015, and on
February 22, 2016, due to technical problems. Therefore, the average
occurrence of flash flood events is estimated at 3.0 times in a rainy
season. The largest event occurred on April 13, 2016, as shown in Figure
3. Table 2 summarizes the date of occurrence, the starting time, the
ending time, , , , , , and for each flash flood event.
Figure 3. Photos shot during the flash flood event on April 13, 2016,
with an interval of 1 hour
Table 2. Observed rainfall-runoff events with total runoff volume more
than 100 m3