Land Subsidence In The Cerro Prieto Geothermal Field, Baja California, Mexico, From 1994 To 2005, An Integrated Analysis Of Dinsar, Leveling And Geological Data

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Journal Article: Land Subsidence In The Cerro Prieto Geothermal Field, Baja California, Mexico, From 1994 To 2005, An Integrated Analysis Of Dinsar, Leveling And Geological Data

Abstract
Cerro Prieto is the oldest and largest Mexican geothermal field in operation and has been producing electricity since 1973. The large amount of geothermal fluids extracted to supply steam to the power plants has resulted in considerable deformation in and around the field. The deformationincludes land subsidence andrelated ground fissuring and faulting. These phenomena have produced severe damages to the local infrastructure such as roads, irrigation canals and other facilities. In this paper, the technique of Differential Synthetic Aperture Radar Interferometry (DInSAR) is applied using C-band ENVISAR ASAR data acquired between 2003 and 2006 to determine the extent and amount of land subsidence in the Mexicali Valley near Cerro Prieto Geothermal Field. The DInSAR results were compared with published data fromprecise leveling surveys (1994-1997 and 1997-2006) and detailed geological information in order to improve understanding of the temporal and spatial distributions of anthropogenic subsidence in the Mexicali Valley. The leveling and DInSAR data were modeledto characterize the observed deformation in terms of fluid extraction. The results confirm that the tectonic faults control the spatial extent of the observed subsidence. These faults likely act asgroundwater flow barriers for aquifers and reservoirs. The shape of the subsiding area coincides with the Cerro Prieto pull-apart basin.In addition, the changes in spatial pattern and rate of the subsidence are correlated with the development of the Cerro Prieto Geothermal Field.

Authors 
Olga Sarychikhina, Ewa Glowacka, Robert Mellors and Francisco Suarez Vidal








Published Journal 
Journal of Volcanology and Geothermal Research, Date Not Provided





DOI 
Not Provided
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Citation

Olga Sarychikhina,Ewa Glowacka,Robert Mellors,Francisco Suarez Vidal. . Land Subsidence In The Cerro Prieto Geothermal Field, Baja California, Mexico, From 1994 To 2005, An Integrated Analysis Of Dinsar, Leveling And Geological Data. Journal of Volcanology and Geothermal Research. (!) .