KOMPAS.com - New lakes emerged after tropical cyclone Seroja hit East Nusa Tenggara (NTT) province on Sunday, April 4. Rainwater has covered some parts of the villages such as motocross track and farmland.
Head of the NTT Meteorology, Climatology and Geophysics Agency (BMKG) Margiono said the formation of the new lake namely Lake Tangkolo in Sikumana village, Kupang was the result of the recent extreme weather that hit the area.
"The extreme weather conditions at that time triggered the emergence of water springs from the rocks of a mountain ridge in the area," said Margiono at Lake Tangkolo Tuesday, April 20.
Elsewhere, the NTT Indonesian Geological Experts Association chairman Dr. Herry Kota said the new lake is categorized as a karst lake following a high erosion process in limestone areas.
"The newly-formed lake in Sikumana village is categorized as dolina lakes or karst lakes," State News Antara quoted Herry as saying Monday, April 19.
He explained that the formation of lakes often occurs in areas with karst topography or landscapes that have a distinctive hydrological cycle as a result of carbonate rocks development.
"The karst topographical area of Kupang city consists of extensive limestone. If high-intensity rain poured, there would be a very high process of erosion or dissolution of limestone," Herry continued.
Previously, Mikhael Lakapu, a resident, confirmed the appearance of the new lake in Sikumana Village.
At first, the residents felt earthquake tremors from the ground before water overflowed and covered the farmland.