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Table 4 Values of the rock properties fixed during the back analysis

From: THM modeling of hydrothermal circulation at Rittershoffen geothermal site, France

Property (unit) Upper sediments Lower sediments Upper granite Lower granite
Porosity \(\phi _o\) (\(\%\)) 9.0 9.0 3.0 0.3
Total specific mass \(r_0\) (kg m\(^{-3}\)) 2390 2390 2690 2690
Biot coefficient b (–) 0.73 0.90 0.36 0.36
Specific heat \(c_s\) (J kg\(^{-1}\) K\(^{-1}\)) 800.0 800.0 800.0 800.0
Thermal dilation \(\alpha _0\) (10\(^{-5}\) K\(^{-1}\)) 1.4 1.4 1.4 1.4
Heat source production \(\theta _{\text{rad}}\) (\(\upmu\)W m\(^{-3}\)) 0.1 1.0 5.0 5.0