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Land subsidence characteristics of Bandung Basin as revealed by ENVISAT ASAR and ALOS PALSAR interferometry
Ge L.a, Ng A.H.M.a, Li X.a, Abidin H.Z.b, Gumilar I.b
a Geoscience and Earth Observing Systems Group (GEOS), School of Civil and oEnvironmental Engineering, The University of New South Wales (UNSW), Australia
b Geodesy Research Division, Faculty of Earth Science and Technology, Institute of Technology Bandung (ITB), Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]In this work, land subsidence in Bandung Basin, Indonesia between 2002 and 2011 was mapped using the C-band ENVISAT ASAR and L-band ALOS PALSAR data. Twenty four ALOS PALSAR and thirty ENVISAT ASAR images acquired between 2002-2008 and 2007 – 2011, respectively, were analysed. Several locations that were experiencing land displacement were identified including Cimahi, Dayeuh Kolot, Rancaekek, Solokan Jeruk and Gedebage. The subsidence rates in the basin range from -240. mm/year to 40. mm/year. The comparison between the ALOS PALSAR and ENVISAT ASAR measurements, which showed good agreement, suggested the subsidence in many areas of the basin were steady between 2002 and 2011, except south Bandung. Acceleration of subsidence in south Bandung was observed between the measurements from the two datasets, likely as a result of increasing population and industries. The subsidence in the basin was expected mainly as a result of excessive groundwater extraction and soil consolidation caused by surficial loading. GPS survey data collected between 2002 and 2010 were used to validate the ALOS PALSAR and ENVISAT ASAR measurements. Good correlations were observed between InSAR and GPS measurements. The comparison between the land subsidence measurements and the groundwater level information showed there were some correlations between them. For every 1. m reduction in groundwater level per annum, ground subsidence of 20-23. mm per annum has been observed. The comparison results suggested that there was no evidence showing the aquifer in the basin is being recovered. © 2014 Elsevier Inc.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Alos palsar datum,Bandung Basin,Comparison result,Good correlations,Groundwater extraction,InSAR,Radar interferometry,Soil consolidation,ALOS PALSAR,Bandung basin,ENVISAT ASAR,Land subsidence[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Bandung Basin,InSAR,Radar Interferometry,Subsidence[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]This research was supported under Australian Research Council’s Discovery funding scheme (project number DP130101694 ). The authors wish to thank the Earth Remote Sensing Data Analysis Center (ERSDAC) and the European Space Agency (ESA) for providing the ALOS PALSAR and ENVISAT ASAR data, respectively. METI and JAXA retain ownership of the ALOS PALSAR original data. Finally, the authors would like to thank the reviewers and editor for their comments which have helped greatly to improve the manuscript.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.rse.2014.08.004[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]