Fault characterization and heat-transfer modeling to the Northwest of Nevado del Ruiz Volcano

Three modeling scenarios were considered, investigating the influence of fault dip in groundwater flow and heat transfer processes. It was possible to reproduce the temperature measured at the Hotel Termales hot spring, where the Samaná Sur fault appears to behave as a pathway for geothermal fluids. It was additionally found that fault dip has an influence on the simulated temperatures. When the dip is in favor of the fluid flow (<90° facing fluid flow), the simulated surface temperature increases; on the other hand, if the dip of fault is opposite to the fluid flow (>90° facing fluid flow), the simulated surface temperature decreases.