ABSTBACT: Sarayönü and Kadınhanı plain İs formed by Upper Miocene and PlJo-Quaiternary.aged lake sediments, TMs plain Is limited from south by Middle Devonkn-aged Ltaratonea and Lover Bevonian-aget] metanuDrpMc schiste, In the lake sediments groundwater levels reached their maximum In April 1981 and their minimum in October 1981, The groundwater levels during these two periods ranged from 0,4 to 2.75 m, At this budget period the height of precipîtotjon on the plain was approximately 400 mm. On the other hand, the calculated amount of the real evapo-transpiration was Etr = 345,18 ,mm. However during1 July, August, September üı 1981 the precipitation had fallen on the plain. Because of the excess of this precipitation Wm reserve of groundwater in October 1981 were comparable increased than of October 1980s The amount of fit can be shown as ; £ §, = 13.3x100 m«. Upper Miocene and Pli-Qmternary aged lake `sédiments are charged by the Kurşunlu formation. Charge rates are Q*n ^ »3.88x10« ntf/per year, Surface flows which occur after heavy raiiis don`t last long their amount is #hown as the twenty percent «af all precipitation (Qr s= £2.2x100 ntf/year)