Page 14 - Mediajaya 09 Edition 2020
P. 14
TOP REPORT A Collaboration
to Manage Rain Water
Together, the citizens of Jakarta build infiltration wells and vertical
drainages to prevent floodings.
he rapid change in land use impacted contain the rainwater so it wont run to the
on the water catchment area. It hard- sewers or rivers altogether. It will also help
T ened the ground to absorb rainwater. reduce the capacity load for the existing
The lack of this catchment area will allow drainages.
rainwater to run off and trigger floodings
14 and inundation. The city majors had followed up the decree,
one of them is the major and city govern-
Year by year, the total volume of run-off ment of East Jakarta. According to its Ma-
water in cities area including Jakarta has jor Muhammad Anwar, he and his staffs
always been increasing. In 1990-2000’s, have targetted on building 900,000 verti-
only 50-60% of rainwater had run off to the cal drainages in 10 out of 65 subdistricts in
city. Today, the volume increased to more East Jakarta. The vertical drainages, said
than 72%. In Jakarta alone, only 3% of rain- Anwar, will hopefully contain the rainwater
water being absorbed to the ground, while so it can prevent the risk of flood and in-
the other 97% ran off to the surfaces of the undation.
ground or into the channel drains, causing
flood as well as drought in dry season. Currently, in East Jakarta they have built
two points of drainages in Panjaitan Street
Several schemes were made by the Pro- and 40 points of drainages in Jatinega-
vincial Government of Jakarta (Pemprov ra district, start from Kodam Jaya to Pas-
DKI) to overcome the problem, but none ar Gembrong. He and his staffs focused to
of them seemed enough. By issuing a Gu- build vertical drainage in the south side of
bernatorial Decree (Ingub) No.52/2020, East Jakarta, specifically in residential ar-
Jakarta government invited communities eas where there are Kali Sunter and Kali
in Jakarta to collaborate, to build infiltra- Cipinang streams. By doing so, the rainwa-
tion wells and vertical drainages in office ter coming from the upstream area will be
buildings, public facilities and also in res- restrained in the reservoirs, vertical drain-
idential areas. Jakarta needs to build at ages and infiltration wells built by the resi-
least 1.8 millions of vertical drainages to dents.
