ANALISIS ANOMALI GAYABERAT ANTAR  WAKTU UNTUK PEMANTAUAN AMBLESAN TANAH  DI KOTA SEMARANG

Yossi Meida Malanda; - Supriyadi; Suharto Linuwih

Yossi Meida Malanda Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang
- Supriyadi Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang
Suharto Linuwih Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Semarang

Keywords: Land Subsidence, Anomaly, Tidal, Drift

Abstract

Land subsidence monitoring have been conducted in May and October 2012 method of gravity time lapse, after correction tides, drift correction, and the correction of rainfall it is known that severe land subsidence occurred in the Boysa Church, 109, and Altex Warehouse with anomalous values gravity greater than 0.8 mGal, while the Marina beach, Agility, Office of Energy and Mineral Resources, Mollitex, Puri Anjasmoro, Kampung Laut, Komijen, Ports, Kaligawe, RMJ Kaligawe, SPBE arteries, Cipto 4, and Cipto 5 gravity anomaly values of 0.2-0.8 mGal. In addition to soil subsidence occurs, Semarang city also experienced a reduction in groundwater that occur in the Puri Bima Sakti, Rabbit, Pump, 106, Barito, Kh. Wahid Hasim, Boom Lama Market, SMK 10, Dadapsari, and SMA 14 with anomalous values of -0.1 to -0.5 mGal. Another point that is relatively stable due to low value anomalies are approximately 0.1 to -0.1 mGal.

References

Akasaka, C. & S. Nakanishi. 2000. Correction of Background Gravity Changes Due to Precipitation in the Oguni Geothermal Field, Japan. Proceedings World Geothermal Congress, pp. 2471-2475.

Allis R.G. & T.H. Hunt. 1984. Modelling The Gravity Changes at Wairakei Geothermal Field. Proc. 6 th NZ Geothermal Workshop:117-121.

Dahrin, D., Sarkowi, W.G.A. Kadir, & S. Minardi. 2007. Penurunan Volume Airtanah Daerah Semarang berdasarkan Pemodelan 3D Gayaberat Antar Waktu. Jurnal Geoaplika,(2)1:11-17.

Davis, K., Y. Li, & M. Batzle. 2008. Time-Lapse Gravity Monitoring: A Systematic 4D Approach with Application to Aquifer Storage and Recovery. Journal of Applied Geophysics, (73)6: 61-69.

Jambrik, R. 2006. Analysis of Water Level and Subsidence Data from Thorez Open-Pit Mine, Hungary. Mine Water and The Enviromental,(14)2: 13-22.

Marsudi. 2000. Prediksi Laju Amblesan Tanah di Dataran Alluvial Semarang Propinsi Jawa Tengah. Disertasi. Bandung : Institut Teknologi Bandung.

Octonovrilna, L. & I.P. Pudja. 2009. Analisa Perbandingan Anomaly Gravitasi dengan Persebaran Intrusi Air Asin. Jurnal Meteorologi dan Geofisika, (10)1: 39-57.