Environmental Engineering Reference
In-Depth Information
Fig. 4.4 Annual
precipitation between 1961
and 2009
1800
1600
1400
1200
1000
800
600
400
200
0
Month
Fig. 4.5 Monthly
precipitation between 1961
and 2009
350
300
250
200
150
100
50
0
Month
In 1963, 1976, and 1977, the maximum monthly precipitation was 277, 242.3,
and 346.1 mm, respectively (recorded in November, December, and March).
Between 1961 and 2009, the maximum rainfall was in spring and autumn, with the
first peak occurring in May and June and the second peak occurring in October and
November (Figs.
4.5
and
4.6
).
For the recent flood event of 2008, the amount of precipitation recorded in May
was 156 mm; however, almost the same value was recorded for 1983 but no flood
was reported for this year. It is obviously clear that there was a triggering factor for
occurrence of flood in 2008.
Although a similar precipitation value to the 2008 flood event was recorded for
1983, no flood was reported.
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