Advances in the hydraulic interpretation of water wells using flowmeter logs

Abstract. This paper reports on the methodology developed for a new hydraulic interpretation of flowmeter logs, allowing better characterization continental hydrological basins. In course log, different flow stretches are established, mostly corresponding to permeable layers (aquifers), among which there other mainly less (aquitards). such basins sufficient thickness, these may not have same head. fact brings about need that provides actual distribution horizontal permeability throughout aquifer at depth. The modified in this study focuses differences effective pressure gradient (considered difference between head well and each stretch) experienced by along well, due existence heads. has been starting from water located multilayered within so-called Madrid basin (the north-western part Tagus River), centre Iberian Peninsula. step-drawdown pumping test was conducted, rate versus drawdown specific capacity showed discrepancies with Darcian behaviour an exponent Jacob equation than 1. Flowmeter logs were then recorded discharge rates pump depths; resulting input deeper did appear show expected relation respect drawdown. With proposed results comply linearity cited solved.