TY - JOUR
T1 - MONITORING OF JAKARTA SUBSIDENCE APPLYING 4D MICROGRAVITY SURVEY BETWEEN 2014 AND 2018
AU - Rosid, Mohammad Syamsu
AU - Prastama, Rizky Adityo
AU - Yusuf, Mahmud
AU - Daud, Yunus
AU - Riyanto, Agus
N1 - Funding Information:
We would like to thank DRPM Universitas Indonesia for the valuable financial support of PUTI grant No: BA-1690/UN2.RST/PPM.00.03.01/2020 to publish the results. We also thank BMKG and BKAT for their permission to use the measurement tools as well as the gravity secondary data and water level data.
Publisher Copyright:
© 2021 Int. J. of GEOMATE. All Rights Reserved.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - A study of time-lapse or 4D microgravity has been conducted to detect subsidence zones and the rate of subsidence between 2014 and 2018 in Jakarta. Jakarta city is mostly covered by a quaternary alluvium fan. Subsidence happened by several factors including excessive water exploitation, loss of recharge area, surface load, and the natural sinking properties of unconsolidated alluvium. By combining the complete Bouguer Anomaly (CBA) equation and gravity gradiometry methods, the Bouguer density of 2.33 g/cm3 can be obtained. Since subsidence occurred in the near-surface, the regional gravity anomaly has been separated from CBA by using combined spectrum analysis and moving average methods after implementing a Fourier Transform. The result shows that subsidence occurred all over the coastal area of Jakarta. In northern Jakarta, the average subsidence rate is more than 10 cm/year, and the highest rate happened in Tambora district with 15.9 cm/year. There is also a negative 4D microgravity anomaly in the southern part of Jakarta that seems to be related to ground level uplift and declining groundwater level.
AB - A study of time-lapse or 4D microgravity has been conducted to detect subsidence zones and the rate of subsidence between 2014 and 2018 in Jakarta. Jakarta city is mostly covered by a quaternary alluvium fan. Subsidence happened by several factors including excessive water exploitation, loss of recharge area, surface load, and the natural sinking properties of unconsolidated alluvium. By combining the complete Bouguer Anomaly (CBA) equation and gravity gradiometry methods, the Bouguer density of 2.33 g/cm3 can be obtained. Since subsidence occurred in the near-surface, the regional gravity anomaly has been separated from CBA by using combined spectrum analysis and moving average methods after implementing a Fourier Transform. The result shows that subsidence occurred all over the coastal area of Jakarta. In northern Jakarta, the average subsidence rate is more than 10 cm/year, and the highest rate happened in Tambora district with 15.9 cm/year. There is also a negative 4D microgravity anomaly in the southern part of Jakarta that seems to be related to ground level uplift and declining groundwater level.
KW - Gradiometry
KW - Jakarta
KW - Microgravity
KW - Moving Average
KW - Subsidence
UR - http://www.scopus.com/inward/record.url?scp=85101585013&partnerID=8YFLogxK
U2 - 10.21660/2021.79.j2031
DO - 10.21660/2021.79.j2031
M3 - Article
AN - SCOPUS:85101585013
SN - 2186-2982
VL - 20
SP - 132
EP - 138
JO - International Journal of GEOMATE
JF - International Journal of GEOMATE
IS - 79
ER -