logo Kompas.id
EnglishFloods and Underground...

Floods and Underground Reservoirs

Jakarta is built in a lowland area that was once a sea and was formed by the sedimentation of soil collected from the mountains around the Bandung Basin up to Bogor during the Holocene and Pliocene ages.

· 5 minutes read
Kompas/Heru Sri Kumoro

People wade through floodwaters on Jl. Daan Mogot in West Jakarta, Wednesday (1/1/2020). Heavy rains caused flooding through Jakarta and its surrounding areas, paralyzing traffic on Jl. Daan Mogot as well as other roads and flooding homes.

Until now, sedimentation in the western and eastern parts of Jakarta Bay continues to occur. The distance the coastline protrudes into the sea will increase, and someday Jakarta Bay will become land. The main deposits that have formed this land, according to a Geological Research Center map, are alluvium, floodplain sediments, coastal ridge sediments and Banten tuffs, meaning floods have played an important role in the formation of this region since long ago. Therefore, the "annual nature party" in the form of floods provides a gift in the form of the land we call Jakarta today.

Old maps from the 1800s belonging to the writer\'s personal collection show that the northern parts of Jakarta were still swamps. Some parts of Jakarta that carry the name "Pulo" reportedly used to be islands and later became part of the mainland due to sedimentation. The physical characteristics of swampy land means it naturally has poor absorption, meaning that flooding has been an annual event since the founding of the city as Jayakarta in the Sunda Kepala region when Fatahillah of the Sultanate of Cirebon succeeded in driving the Portuguese army out of the area on June 22, 1527.

Syahnan Rangkuti
Logo Kompas
Logo iosLogo android
Kantor Redaksi
Menara Kompas Lantai 5, Jalan Palmerah Selatan 21, Jakarta Pusat, DKI Jakarta, Indonesia, 10270.
+6221 5347 710
+6221 5347 720
+6221 5347 730
+6221 530 2200
Kantor Iklan
Menara Kompas Lantai 2, Jalan Palmerah Selatan 21, Jakarta Pusat, DKI Jakarta, Indonesia, 10270.
+6221 8062 6699
Layanan Pelanggan
Kompas Kring
+6221 2567 6000