Page 7 - Mediajaya 09 Edition 2020

MEDIA JAYA | 09 2020

akarta is preparing to enter the
rainy season this year. According to
J the “2020-2021 Rain Prediction in In-
donesia” from the Meteorology, Climat-
alogy and Geophysics agency (BMKG),
the rainy season in Jakarta will gradu-
ally begin in October, reaching its peak
time in January and February next year.
For the intensity of rainfall, it is predict-
ed that the area in East and South Ja-
karta will get more than 115% of intensity,
which is more than the normal average.

Since Jakarta has long history of flood-
ings, the government has prepared for
it. It is important since this year’s season
is more challenging due to the current
weather phenomena: La Nina in the Pa-
cific Ocean and negative phase of Indian
Ocean Dipole (IOD) in the Indian Ocean.
Both of them, according to the head of
BMKG Dwikoriita Karnawati, are potential 7
to increase the intensity of the rainfall
by 40%. It was estimated that 27.5% from
342 seasonal zones (ZOM) in the archi-
pelago will experience wetter rainy sea-
son than the annual average for the last
30 years (period of 1981-2010). The rain-
fall intensity will be higher.

Even without the impact of La Nina and
IOD, the rainfall intensity in Jakarta area
is relatively high. When the flooding oc-
cured last January, the rainfall reached
377 mm/day. As a result, many rivers
and drainages were overflowed, since
the capacity of the rivers in Jakarta only
covers 2,357 m3/second of water while
An aerial
photograph of the the debit of water that time reached
Ciliwung River and
dense settlements 3,389 m3/second. Besides, the drainag-
along the riverbank es in the city are designed to contain for
to the East Flood
Canal (BKT), a maximum of only 120 mm water per
Jakarta.
day.
Credits
Dharma W. Therefore, since last March the provin-
cial government of Jakarta (Pemprov