LAND SUBSIDENCE AND GEOTECHNICAL IMPACT OF JAKARTA KOTA AREA

Land subsidence has long occurred around the Special Capital Region of Jakarta. It is important to know and deal with events which also cause various negative impacts. Aim: When large amounts groundwater are withdrawn from certain types rocks, such as fine-grained sediments, land occurs. The rock compacts because water helps keep ground in place. removed, rocks collapse on themselves.The immediate impact building Kota Tua DKI Methodology Results: research method used a quantitative descriptive survey by observing amount that occurs area its surroundings. results showed there been vertical varies between 20-60 cm. Based resistivity values coordinates plotted Regional Geological Map (Jakarta Kep Seribu), location classified into Lithology: Clay, Sand Silt, Gravel, Pebbles (Quartenary deposits). phenomenon, subsidence, caused combination parameters, including natural consolidation alluvial soils, excessive extraction, loads infrastructure development tectonic factors. Conclusion, significance, study: Knowing value expected support urban planning, basic planning development, housing, settlement local financial improvement efforts mitigate disasters.