Fig. 4
From: Evaluating an enhanced thermal response test (ETRT) with high groundwater flow
Depth-specific results for a the representative transient temperature increase (ΔT), b the effective thermal conductivity (λeff) and c Darcy velocity (vf) from the Péclet number analysis applying the different specific heat loads, and d the borehole profile. Darcy velocities are compared with results from the MILS analyses (vf,MILS) and the pumping test (vf,pt) by Reuß et al. (2012). Depth intervals where no convergence criterion (Δλeff/λeff < 0.05/20 h) is obtained are highlighted in grey (i.e., no convergence)