Page 8 - EDITION 1 APRIL 2020

MEDIA JAYA EDITION | 01 2020

TOP REPORT Extreme Rains and Flood in Jakarta

Heavy Flooding Intensity of Rain Recorded in BMKG Kebayoran Heaviest Intensity

February 20 th , 1918 125.2 mm/day
February 19 th , 1979 198 mm/day
198 mm/day
February 10 th , 1996 216.2 mm/day Kwitang: 216.2 mm/day
February 2 nd , 2002 168.5 mm/day Kwitang: 168.5 mm/day

February 2 nd , 2007 234/7 mm/day Pd. Betung: 340 mm/day
1. People who were
affected by the flood
evacuated their January 17 th , 2013 174 mm/day Kemayoran: 174 mm/day
motorcycles.
2. Children were January 17 th , 2014 147.9 mm/day Rorotan: 178 mm/day
playing cheerfully in
the flood. February 11 th , 2015 277.5 mm/day Sunter Kodamar: 367 mm/day

January 1 st , 2020 145 mm/day Halim PK: 377 mm/day
Credit
Dharma W/ Source: Infographic/Tommy.K.R
8 Humas Doc The Meteorology, Climatology and 9
Geophysics Agency (BMKG)

the urbanization. It cause a more pow- tors such as landscape, spatial and He also explained that the calcu- preparing proper spatial management around Jakarta has to be involved in
erful and more frequent rain in the management planning, and social lation has considered the runoff co- for water absorption. For example, the order to solve this problem. “The in-
morning. “A research done by Siswan- economy which involved many sectors efficient controlled by the land cover. increasing of residential area in Depok volvement of buffer areas has to be
to (a researcher at BMKG) shows that and multi-interests. “The average runoff coefficient in Ja- has reached of 8% per year in average. the key to handle the flood in Jakarta,”
urbanization in Jakarta changed the According to him, the changing karta was 0.61. it means that 61% of “In 2006 there was 55,16 ha swamp he insisted.
rain pattern, which usually occur in rain pattern from upstream to down- rain became the runoff and only 39% area that functions as water retention Hendricus said that the issue of
the afternoon to be more in the morn- stream areas impacts badly to Jakar- remain absorbed into the land,” area. But in 2009 it became residen- Jakarta’s flooding started with the
ing, especially in December and Janu- ta. Moreover, Jakarta is located in the The condition affected Jakarta, as tial areas,” said Hudoyo. The condi- badly-spatial management for water
ary,” Edvin added. slope of Ciliwung Watershed—making most of the Capital area is categorized tion was worsened by the erosion in absorption in the upstream areas. In
In his opinion, the change of water the Capital as the water accumulation as inundated land system, means the upstream area, causing siltation and another hand, the development of the
channel infrastructure and water-ab- area. area is inundation or depdession stor- reducing the capacity of those 13 riv- cities kept on going.
sorption capacity are needed in order When the flooding happened on age. There will be not enough water ers to stream water to Jakarta. Cur- What he meant by the badly spa- “Rain with the intensity of
to prepare the upcoming extreme con- January 1st, Hudoyo expected that to flow to the lower place towards the rent data shown that total erosion of tial management was the neglection 377 mm day indicated an
dition. there was water accumulation of sea. those 13 watersheds are 217.620 ton/ of natural defenses systems such as anomaly and set a new
4.566,28 m3/second that inundating Long duration of rain with high vol- ha/year. setu and lakes. While in fact, setus record for now,”
The Importance of Buffer Areas many of Jakarta’s area. The expecta- ume also resulted in an exceeding wa- According to Hudoyo, spatial plan- and lakes are effective natural de-
tion came from the calculation of BM- ter holding capacity. Cloudy and rainy ning, controling and advancing water fense areas to absorp water and thus Endarwin,
In separate interview, Hudoyo, KG’s rain intensity data on Decem- days also reduces the sun exposures retention function in each landscape prevent flood in Jakarta. Head of Sensory
the Directorate General of Watershed ber 31st, 2019 and Januury 1st, 2020, needed for evaporation or evapotrans- has to be the concern of every parties, “I hope those in the (upstream) ar- Management Division at The
and Forest Protection Management showing that 8 watersheds (includ- piration, thus increases the amount of in order to handle the flood in Jakarta. eas can protect the existing setus and Meteorology, Climatology
(PDASHL) in the Ministry of Environ- ing 13 rivers) has supplied water of water accumulated on the land sur- Urban and Regional Planner from lakes, as they can be very useful to and Geophysics
ment and Forestry (KLHK) , explained 7.616,88 m3/second to Jakarta. Mean- face. the University of Indonesia, Hendricus contain water when the rain hits hard Agency (BMKG)
that besides climate change, the flood while, those 13 rivers’ can only stream In the meantime, buffers area es- Andy Simarmata, agrees with Hudoyo. in the future,” he explained
in Jakarta also caused by another fac- water of 3.050,62 m3/second. pecially in the downstream had not yet He believes that buffer areas located yen/mus/nis