Groundwater flow characterization of an ophiolitic hard-rock aquifer from cross-borehole multi-level hydraulic experiments

•Characterization of structural heterogeneities and discontinuities in ophiolitic rock.•Cross-borehole open pumping tests and multi-level pumping/monitoring hydraulic tests.•Data interpretation with semi-analytical solutions and automatic fitting techniques.•Models with non-integral flow dimension, leakage and time-dependent pumping flow rate.•Hydraulic property estimates for highly/poorly conductive areas and small flow rates.