JAKARTA - DKI Jakarta Governor Pramono Anung revealed that the flood that hit dozens of RTs in Jakarta on Sunday, January 18, was triggered by very extreme rainfall.
This condition occurred amid the efforts of the DKI Jakarta Provincial Government, which has carried out weather modification operations (OMC) for several days as an effort to reduce the impact of extreme weather.
OMC has been carried out since January 13 and is planned to last until January 22, 2026. The operation is carried out as a mitigation step in the face of potential heavy rain in the Jakarta area and its surroundings.
He explained that on Sunday, OMC was carried out up to three flights. The decision was made after seeing the condition of the Jakarta atmosphere which had been very dense since noon.
"Yesterday, Sunday, there were three flights. It just so happened that I ordered it directly, because Jakarta was already very crowded in the afternoon from three o'clock, two o'clock it was already very crowded," said Pramono at Aryaduta Menteng, Central Jakarta, Monday, January 19.
Pramono said the rainfall recorded in North Jakarta reached a figure he had never encountered during his tenure as governor over the past year. From the eight rain gauges in the area, the average rainfall was above 200 millimeters.
"In North Jakarta there are eight points to calculate the rainfall, an average of 260. There are even ones up to 280 and that is the highest I have ever known during my tenure as Governor of Jakarta," he said.
According to Pramono, the rain with this intensity lasted quite a long time and occurred evenly at all observation points. He emphasized that generally 200 millimeters of rainfall alone has the potential to cause flooding.
Because, the macro drainage system in Jakarta only accommodates a maximum rainfall of 150 millimeters (mm) and supporting channels with a capacity of 100 mm within four hours.
"It rained for a long time, in 8 points all above 200 mm. Even if it's only 200 mm, it's definitely a flood. But whatever I don't complain about it," he said.
In the monitoring of the DKI Provincial Government, the concentration of rain, which mostly occurred in North Jakarta. According to him, about 80 percent of the rainfall accumulated in the area.
Even so, flood management remains the responsibility of the local government. Based on the latest report, all flood-affected areas have been handled since Monday morning.
"Indeed, our estimate is that the rainfall is not like that. Once the rainfall turns out to be very high and then if it rains on Sunday, I am sure it will last a long time in Jakarta," he said.
"But thank God, yes, now the weather modification is scientific, so that weather modification is carried out and finally yesterday it became bright, there was no rain," continued Pramono.
However, he admitted that he was still aware of the potential for extreme rain that could happen again, considering that the rainfall at the end of last week was said to be unprecedented.
"Because after all, the issue of rain, flood management during this month until after Chinese New Year, for me, every day I control myself," he added.
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