Production-Induced Subsidence at the Los Humeros Geothermal Field Inferred from PS-InSAR

Table 2

Description of the models, the best-fitting volume changes attributed to the sources, and the average yearly produced and injected volumes. Note that the volume changes are reported for the period of one year.

(a)

Model results along the cross section (including 81 PS observations)
	Description	Depth (m)	Volume change (10^4 m^3) attributed to source 1	Volume change (10^4 m^3) attributed to source 2	Volume change (10^4 m^3) attributed to source 3	RMS
Model 1	Inflation/deflation point sources	1650	0.0	2.6	-5.8	0.64
Model 2	Tensile point sources	1650	-2.3	1.2	-4.3	0.59

(b)

Areal model results for the northern part of the LHGF (including 1337 PS observations)
	Description	Depth (m)	Total volume change attributed to the 7 sources (10^4 m^3)	RMS
Model 3	Inflation/deflation point sources	1650	-10.0	0.74
Model 4	Tensile point sources	1650	-5.5	0.83

(c)

Average yearly produced and injected volumes during the period of the InSAR based on well data provided by CFE
Total produced volume for a one-year period (10^4 m^3)	Total injected volume for a one-year period (10^4 m^3)
~500	~50