B e c a u se o f stro n g h e te ro g e n e ity a n d a n iso tro p y o f th e k a rst a q u ife r, it is very h a rd to u n d e rs ta n d th e in te rn a l p ro p e rtie s o f th e k a rst a q u ife r. A n a ly z in g th e re c e ssio n c u rv e o f th e k a rs l s p rin g is a n effe ctiv e w ay to so lv e th is p ro b le m . T h is p a p e r r e - v ie w ed th e m e th o d s th a t w ere w id e ly u se d to a n a ly z e th e re c e s s io n c u rv e o f th e k a rsl sp rin g , in c lu d in g e x p o n e n tia l re c e s s io n , n o n - e x p o n e n tia l re c e ssio n a n d so m e co m b in a tio n a n a ly s is m e th o d s. T h e in flu e n c e o f th e c o n d u it o n th e re c e s s io n c u rv e w as a lso d is - c u s s e d . B a se d o n th e s e a n a ly s is m e th o d s, so m e k ey p ro b le m s n e e d to b e so lv e d in th e fu tu re w ere p ro p o se d .