ABSTRACT: Derme spring that .has an average, discharge of 2.6 m3/sc is. the most important karstic discharge in Malatya.Exposed geological units .around She spring` and. its recharge basin; Permo-caıboniferous Malatya, metamorphites, CretaceousGündüzbey group, Eocene Yeşilyurt group and at `the south Eocene Maden complex,, Miocene .Kilayik group.In this area,, limestones of Malatya metanıorphites .are the most important aquifers. Derme spring discharges `throughthe lower limestone, of Malatya metamorphites at 1235 m level. Horizons of basal conglomerate and. reef limestone ofoverburden units bear water of which amounts vary with the thickness and. distrubition of the units.In this research, distribution of aquifer` limestone, its relationship with adjoining groundwater basin» amount ofannual, recharge and coefficient of aquifer recession are determined Stale Hydraulic Works (DSİ) has started to operationsbased, on. the results of this research for development of Derme spring,