ABSTRACT: The Boğsak. karst spring is at `the entrance Boğsak village, al 10 km, distance on. W of Taşucu subprovince.It has 10 m.3/s discharge in .some years and a strong saliniz.ati.on is effective on. 11 months, in per year.An aquifer model possessing many closed underground drainage areas (bowls) taking place at different elevations»which, is proposed drains their water to only one neighbouring underground, drainage area .from only one point, when thegrounwater level of the static reservoir exceeded. This new aquifer model, which, explains both the discharge of the Boğsakkarst spring and the process of the saltation,, will open new sights in to karstic hydrogeology and the generalhydrogeologic s todies.It is concluded that, trying; to prevent the encroachment, of seawater to the spring will be unsuccesfull and uneconomicin general. Therefore., leaving the spring in its own. flow condition is useful only in January and February» when it hasmaximum discharges and discharging the fresh, water by a possible production well located at 1 km distance on SW of thespring with. 250-300 m. depth, is probably the most economical and realistic solution.The- defiencies of the classical way in. the analysis of discharge of a karst spring depending on the time in decreasing periodof spring discharge are explained numerically such .as .shown in. the example of the Boğsak karst spring. One of the mostimportant defiencies in violating assumptions regarding `the relations described in. teh discharge equations, The proposedapproach and the classical approach are applied to the discharge in decreasing period. Comparison of the results shows thevalidity of the approach proposed in this study, Based on all data determined above, the total, static and dynamic rezcrves of theground water in. aquifer- have- been calculated, from the hydraulic parameters and. the dimensional properties of the aquifer.