Jakarta Floods Not Caused By Heavy Rain

Rainfall that fell over the past two days turned out to be smaller when compared with the daily rainfall data at the time of the great flood in 2007. But its impact is almost equal. Overflowing Ciliwung river to soak in the area of Jatinegara and other areas. It’s exactly the same as when the flood hit Jakarta five years ago.

Overall, the floods soak up to 50 villages in the Capital on Tuesday. As of Wednesday, January 16, 2013, flooding still in some places and cut off roads, as roads in the Tangerang-Jakarta Ciledug. In total, nearly 10 thousand people displaced.

The Meteorology, Climatology and Geophysics Agency (BMKG) said the highest daily rainfall in Jakarta on Tuesday and Wednesday mornings only about 100 millimeters. That figure is much lower than the record of highest rainfall in a single day in January 2007 to reach 340 millimeters. Rainfall during January is the predicted 300-400 mm was also considered normal.

Rainfall in the region of Puncak, Bogor, West Java is also lower than five years ago. In 2007, rainfall during the month in Puncak area could even reach 640 mm, with a maximum daily rainfall was 136 mm.

While today, it rained all three days ago much less. on Monday of 22.6 mm, 74.2 mm on Tuesday, and Wednesday 61.4 mm, said Chief Climatological Station Class 1 Darmaga Bogor, Nuryadi, on Wednesday, January 16, 2013.

This proves that the floods in Jakarta discharge due Ciliwung river flows increased dramatically. The increase is related to the discharge of Ciliwung river upstream region was damaged in Puncak.

Head of the Centre for Disaster Studies, Bogor Agricultural University, Euis Sunarti, confirmed. Although the rainfall in the upper Ciliwung-Cisadane smaller, the impact to the greater Jakarta due to water absorption in Puncak, Bogor, is getting weaker. Based on studies with satellite imagery, ecological balance in Puncak area earlier this year had fallen by 50 percent over the previous 15 years.

At the same time, the rivers in Jakarta increasingly lost the ability to carry water up to 70 percent due to narrowing and silting. This condition happens in Puncak and lead to flooding in Jakarta are getting worse.

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